/**
    * Copyright 2005-2016 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.krms.impl.ui;
  
  import org.apache.commons.collections.CollectionUtils;
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.uif.RemotableAttributeError;
  import org.kuali.rice.core.api.util.KeyValue;
  import org.kuali.rice.core.api.util.tree.Node;
  import org.kuali.rice.krad.maintenance.MaintenanceDocument;
  import org.kuali.rice.krad.service.KRADServiceLocator;
  import org.kuali.rice.krad.service.SequenceAccessorService;
  import org.kuali.rice.krad.uif.UifParameters;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.ObjectUtils;
  import org.kuali.rice.krad.web.controller.MaintenanceDocumentController;
  import org.kuali.rice.krad.web.form.DocumentFormBase;
  import org.kuali.rice.krad.web.form.MaintenanceDocumentForm;
  import org.kuali.rice.krad.web.form.UifFormBase;
  import org.kuali.rice.krms.api.KrmsApiServiceLocator;
  import org.kuali.rice.krms.api.engine.expression.ComparisonOperatorService;
  import org.kuali.rice.krms.api.repository.LogicalOperator;
  import org.kuali.rice.krms.api.repository.operator.CustomOperator;
  import org.kuali.rice.krms.api.repository.proposition.PropositionParameterType;
  import org.kuali.rice.krms.api.repository.proposition.PropositionType;
  import org.kuali.rice.krms.api.repository.rule.RuleDefinition;
  import org.kuali.rice.krms.api.repository.term.TermDefinition;
  import org.kuali.rice.krms.api.repository.term.TermResolverDefinition;
  import org.kuali.rice.krms.api.repository.term.TermSpecificationDefinition;
  import org.kuali.rice.krms.api.repository.type.KrmsAttributeDefinition;
  import org.kuali.rice.krms.impl.repository.ActionBo;
  import org.kuali.rice.krms.impl.repository.AgendaBo;
  import org.kuali.rice.krms.impl.repository.AgendaItemBo;
  import org.kuali.rice.krms.impl.repository.ContextBoService;
  import org.kuali.rice.krms.impl.repository.FunctionBoService;
  import org.kuali.rice.krms.impl.repository.KrmsAttributeDefinitionService;
  import org.kuali.rice.krms.impl.repository.KrmsRepositoryServiceLocator;
  import org.kuali.rice.krms.impl.repository.PropositionBo;
  import org.kuali.rice.krms.impl.repository.PropositionParameterBo;
  import org.kuali.rice.krms.impl.repository.RuleBo;
  import org.kuali.rice.krms.impl.repository.RuleBoService;
  import org.kuali.rice.krms.impl.repository.TermBo;
  import org.kuali.rice.krms.impl.rule.AgendaEditorBusRule;
  import org.kuali.rice.krms.impl.util.KRMSPropertyConstants;
  import org.kuali.rice.krms.impl.util.KrmsImplConstants;
  import org.kuali.rice.krms.impl.util.KrmsServiceLocatorInternal;
  import org.springframework.stereotype.Controller;
  import org.springframework.validation.BindingResult;
  import org.springframework.web.bind.annotation.ModelAttribute;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.ResponseBody;
  import org.springframework.web.servlet.ModelAndView;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Controller for the Test UI Page
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @Controller
  @RequestMapping(value = org.kuali.rice.krms.impl.util.KrmsImplConstants.WebPaths.AGENDA_EDITOR_PATH)
  public class AgendaEditorController extends MaintenanceDocumentController {
  
      private SequenceAccessorService sequenceAccessorService;
  
      /**
       * Override route to set the setSelectedAgendaItemId to empty and disable all the buttons
       *
       * @see org.kuali.rice.krad.web.controller.MaintenanceDocumentController#route
       *     (DocumentFormBase, BindingResult, HttpServletRequest, HttpServletResponse)
       */
      @Override
      @RequestMapping(params = "methodToCall=route")
      public ModelAndView route(@ModelAttribute("KualiForm") DocumentFormBase form, BindingResult result,
              HttpServletRequest request, HttpServletResponse response) {
  
         ModelAndView modelAndView;
         MaintenanceDocumentForm maintenanceForm = (MaintenanceDocumentForm) form;
         AgendaEditor agendaEditor = ((AgendaEditor) maintenanceForm.getDocument().getNewMaintainableObject().getDataObject());
         agendaEditor.setSelectedAgendaItemId("");
         agendaEditor.setDisableButtons(true);
         modelAndView = super.route(form, result, request, response);
 
         return modelAndView;
     }
 
     /**
      * This overridden method does extra work on refresh to update the namespace when the context has been changed.
      *
      * @see org.kuali.rice.krad.web.controller.UifControllerBase#refresh(org.kuali.rice.krad.web.form.UifFormBase, org.springframework.validation.BindingResult, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
      */
     @RequestMapping(params = "methodToCall=" + "refresh")
     @Override
     public ModelAndView refresh(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
         ModelAndView modelAndView = super.refresh(form, result, request, response);
 
         // handle return from context lookup
         MaintenanceDocumentForm maintenanceForm = (MaintenanceDocumentForm) form;
         AgendaEditor agendaEditor = ((AgendaEditor) maintenanceForm.getDocument().getNewMaintainableObject().getDataObject());
         AgendaEditorBusRule rule = new AgendaEditorBusRule();
         if (rule.validContext(agendaEditor) && rule.validAgendaName(agendaEditor)) {
             // update the namespace on all agenda related objects if the contest has been changed
             if (!StringUtils.equals(agendaEditor.getOldContextId(), agendaEditor.getAgenda().getContextId())) {
                 agendaEditor.setOldContextId(agendaEditor.getAgenda().getContextId());
 
                 String namespace = "";
                 if (!StringUtils.isBlank(agendaEditor.getAgenda().getContextId())) {
                     namespace = getContextBoService().getContextByContextId(agendaEditor.getAgenda().getContextId()).getNamespace();
                 }
 
                 for (AgendaItemBo agendaItem : agendaEditor.getAgenda().getItems()) {
                     agendaItem.getRule().setNamespace(namespace);
                     for (ActionBo action : agendaItem.getRule().getActions()) {
                         action.setNamespace(namespace);
                     }
                 }
             }
         }
         return modelAndView;
     }
 
 
     @Override
     public ModelAndView maintenanceEdit(@ModelAttribute("KualiForm") MaintenanceDocumentForm form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         // Reset the page Id so that bread crumbs can come back to the default page on EditAgenda
         form.setPageId(null);
         return super.maintenanceEdit(form,result,request,response);
     }
 
     /**
      * This method updates the existing rule in the agenda.
      */
     @RequestMapping(params = "methodToCall=" + "goToAddRule")
     public ModelAndView goToAddRule(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
         setAgendaItemLine(form, null);
         AgendaEditor agendaEditor = getAgendaEditor(form);
         agendaEditor.setAddRuleInProgress(true);
         form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-AddRule-Page");
         return super.navigate(form, result, request, response);
     }
 
     /**
      * This method sets the agendaItemLine for adding/editing AgendaItems.
      * The agendaItemLine is a copy of the agendaItem so that changes are not applied when
      * they are abandoned.  If the agendaItem is null a new empty agendaItemLine is created.
      *
      * @param form
      * @param agendaItem
      */
     private void setAgendaItemLine(UifFormBase form, AgendaItemBo agendaItem) {
         AgendaEditor agendaEditor = getAgendaEditor(form);
         if (agendaItem == null) {
             RuleBo rule = new RuleBo();
             rule.setId(getSequenceAccessorService().getNextAvailableSequenceNumber("KRMS_RULE_S", RuleBo.class)
                     .toString());
             if (StringUtils.isBlank(agendaEditor.getAgenda().getContextId())) {
                 rule.setNamespace("");
             } else {
                 rule.setNamespace(getContextBoService().getContextByContextId(agendaEditor.getAgenda().getContextId()).getNamespace());
             }
             agendaItem = new AgendaItemBo();
             agendaItem.setRule(rule);
             agendaEditor.setAgendaItemLine(agendaItem);
         } else {
             // TODO: Add a copy not the reference
             agendaEditor.setAgendaItemLine((AgendaItemBo) ObjectUtils.deepCopy(agendaItem));
         }
 
 
         if (agendaItem.getRule().getActions().isEmpty()) {
             ActionBo actionBo = new ActionBo();
             actionBo.setTypeId("");
             actionBo.setNamespace(agendaItem.getRule().getNamespace());
             actionBo.setRuleId(agendaItem.getRule().getId());
             actionBo.setSequenceNumber(1);
             agendaEditor.setAgendaItemLineRuleAction(actionBo);
         } else {
             agendaEditor.setAgendaItemLineRuleAction(agendaItem.getRule().getActions().get(0));
         }
 
         agendaEditor.setCustomRuleActionAttributesMap(agendaEditor.getAgendaItemLineRuleAction().getAttributes());
         agendaEditor.setCustomRuleAttributesMap(agendaEditor.getAgendaItemLine().getRule().getAttributes());
     }
 
     /**
      * This method returns the id of the selected agendaItem.
      *
      * @param form
      * @return selectedAgendaItemId
      */
     private String getSelectedAgendaItemId(UifFormBase form) {
         AgendaEditor agendaEditor = getAgendaEditor(form);
         return agendaEditor.getSelectedAgendaItemId();
     }
 
     /**
      * This method sets the id of the cut agendaItem.
      *
      * @param form
      * @param cutAgendaItemId
      */
     private void setCutAgendaItemId(UifFormBase form, String cutAgendaItemId) {
         AgendaEditor agendaEditor = getAgendaEditor(form);
         agendaEditor.setCutAgendaItemId(cutAgendaItemId);
     }
 
     /**
      * This method returns the id of the cut agendaItem.
      *
      * @param form
      * @return cutAgendaItemId
      */
     private String getCutAgendaItemId(UifFormBase form) {
         AgendaEditor agendaEditor = getAgendaEditor(form);
         return agendaEditor.getCutAgendaItemId();
     }
 
     /**
      * This method updates the existing rule in the agenda.
      */
     @RequestMapping(params = "methodToCall=" + "goToEditRule")
     public ModelAndView goToEditRule(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         agendaEditor.setAddRuleInProgress(false);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
         String selectedItemId = agendaEditor.getSelectedAgendaItemId();
         AgendaItemBo node = getAgendaItemById(firstItem, selectedItemId);
 
         preprocessCustomOperators(node.getRule().getProposition(), getCustomOperatorValueMap(form));
 
         setAgendaItemLine(form, node);
 
         form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-EditRule-Page");
         return super.navigate(form, result, request, response);
     }
 
     /**
      * Gets a map from function ID to custom operator key.
      *
      * <p>The key for a custom operator uses a special prefix and format.</p>
      *
      * @param form the form containing the agenda editor
      * @return the map from function id to custom operator key
      */
     protected Map<String,String> getCustomOperatorValueMap(UifFormBase form) {
         List<KeyValue> allPropositionOpCodes = new PropositionOpCodeValuesFinder().getKeyValues(form);
 
         // filter to just custom operators
         Map<String, String> functionIdToCustomOpCodeMap = new HashMap<String, String>();
         for (KeyValue opCode : allPropositionOpCodes) {
             if (opCode.getKey().startsWith(KrmsImplConstants.CUSTOM_OPERATOR_PREFIX)) {
                 CustomOperator customOperator = getCustomOperatorUiTranslator().getCustomOperator(opCode.getKey());
                 functionIdToCustomOpCodeMap.put(customOperator.getOperatorFunctionDefinition().getId(), opCode.getKey());
             }
         }
 
         return functionIdToCustomOpCodeMap;
     }
 
     /**
      * Looks for any custom function calls within simple propositions and attempts to convert them to custom
      * operator keys.
      *
      * @param proposition the proposition to search within and convert
      * @param customOperatorValuesMap a map from function ID to custom operator key, used for the conversion
      */
     protected void preprocessCustomOperators(PropositionBo proposition, Map<String, String> customOperatorValuesMap) {
         if (proposition == null) { return; }
 
         if (proposition.getParameters() != null && proposition.getParameters().size() > 0) {
             for (PropositionParameterBo param : proposition.getParameters()) {
                 if (PropositionParameterType.FUNCTION.getCode().equals(param.getParameterType())) {
                     // convert to our convention of customOperator:<functionNamespace>:<functionName>
                     String convertedValue = customOperatorValuesMap.get(param.getValue());
                     if (!StringUtils.isEmpty(convertedValue)) {
                         param.setValue(convertedValue);
                     }
                 }
             }
         } else if (proposition.getCompoundComponents() != null && proposition.getCompoundComponents().size() > 0) {
             for (PropositionBo childProposition : proposition.getCompoundComponents()) {
                 // recurse
                 preprocessCustomOperators(childProposition, customOperatorValuesMap);
             }
         }
     }
 
     /**
      *  This method adds the newly create rule to the agenda.
      */
     @RequestMapping(params = "methodToCall=" + "addRule")
     public ModelAndView addRule(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         AgendaBo agenda = agendaEditor.getAgenda();
         AgendaItemBo newAgendaItem = agendaEditor.getAgendaItemLine();
 
         if (!validateProposition(newAgendaItem.getRule().getProposition(), newAgendaItem.getRule().getNamespace())) {
             form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-AddRule-Page");
             // NOTICE short circuit method on invalid proposition
             return super.navigate(form, result, request, response);
         }
 
         newAgendaItem.getRule().setAttributes(agendaEditor.getCustomRuleAttributesMap());
         updateRuleAction(agendaEditor);
 
         if (agenda.getItems() == null) {
             agenda.setItems(new ArrayList<AgendaItemBo>());
         }
 
         AgendaEditorBusRule rule = new AgendaEditorBusRule();
         MaintenanceDocumentForm maintenanceForm = (MaintenanceDocumentForm) form;
         MaintenanceDocument document = maintenanceForm.getDocument();
         if (rule.processAgendaItemBusinessRules(document)) {
             newAgendaItem.setId(getSequenceAccessorService().getNextAvailableSequenceNumber("KRMS_AGENDA_ITM_S", AgendaItemBo.class)
                     .toString());
             newAgendaItem.setAgendaId(getCreateAgendaId(agenda));
             if (agenda.getFirstItemId() == null) {
                 agenda.setFirstItemId(newAgendaItem.getId());
             } else {
                 // insert agenda in tree
                 String selectedAgendaItemId = getSelectedAgendaItemId(form);
                 if (StringUtils.isBlank(selectedAgendaItemId)) {
                     // add after the last root node
                     AgendaItemBo node = getFirstAgendaItem(agenda);
                     while (node.getAlways() != null) {
                         node = node.getAlways();
                     }
                     node.setAlwaysId(newAgendaItem.getId());
                     node.setAlways(newAgendaItem);
                 } else {
                     // add after selected node
                     AgendaItemBo firstItem = getFirstAgendaItem(agenda);
                     AgendaItemBo node = getAgendaItemById(firstItem, selectedAgendaItemId);
                     newAgendaItem.setAlwaysId(node.getAlwaysId());
                     newAgendaItem.setAlways(node.getAlways());
                     node.setAlwaysId(newAgendaItem.getId());
                     node.setAlways(newAgendaItem);
                 }
             }
             // add it to the collection on the agenda too
             agenda.getItems().add(newAgendaItem);
             agendaEditor.setAddRuleInProgress(false);
             form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-Agenda-Page");
         } else {
             form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-AddRule-Page");
         }
         return super.navigate(form, result, request, response);
     }
 
     /**
      * Validate the given proposition and its children.  Note that this method is side-effecting,
      * when errors are detected with the proposition, errors are added to the error map.
      * @param proposition the proposition to validate
      * @param namespace the namespace of the parent rule
      * @return true if the proposition and its children (if any) are considered valid
      */
     // TODO also wire up to proposition for faster feedback to the user
     private boolean validateProposition(PropositionBo proposition, String namespace) {
         boolean result = true;
 
         if (proposition != null) { // Null props are allowed.
 
             if (StringUtils.isBlank(proposition.getDescription())) {
                 GlobalVariables.getMessageMap().putError(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                         "error.rule.proposition.missingDescription");
                 result &= false;
             }
 
             if (StringUtils.isBlank(proposition.getCompoundOpCode())) {
                 // then this is a simple proposition, validate accordingly
 
                 result &= validateSimpleProposition(proposition, namespace);
 
             } else {
                 // this is a compound proposition (or it should be)
                 List<PropositionBo> compoundComponents = proposition.getCompoundComponents();
 
                 if (!CollectionUtils.isEmpty(proposition.getParameters())) {
                     GlobalVariables.getMessageMap().putError(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                             "error.rule.proposition.compound.invalidParameter", proposition.getDescription());
                     result &= false;
                 }
 
                 // recurse
                 if (!CollectionUtils.isEmpty(compoundComponents)) for (PropositionBo childProp : compoundComponents) {
                     result &= validateProposition(childProp, namespace);
                 }
             }
         }
 
         return result;
     }
 
     /**
      * Validate the given simple proposition.  Note that this method is side-effecting,
      * when errors are detected with the proposition, errors are added to the error map.
      * @param proposition the proposition to validate
      * @param namespace the namespace of the parent rule
      * @return true if the proposition is considered valid
      */
     private boolean validateSimpleProposition(PropositionBo proposition, String namespace) {
         boolean result = true; 
         
         String propConstant = null;
         if (proposition.getParameters().get(1) != null) {
             propConstant = proposition.getParameters().get(1).getValue();
         }
         String operatorCode = null;
         if (proposition.getParameters().get(2) != null) {
             operatorCode = proposition.getParameters().get(2).getValue();
         }
 
         String termId = null;
         if (proposition.getParameters().get(0) != null) {
             termId = proposition.getParameters().get(0).getValue();
         }
 
         // Simple proposition requires all of propConstant, termId and operator to be specified
         if (StringUtils.isBlank(termId)) {
             GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                     "error.rule.proposition.simple.blankField", proposition.getDescription(), "Term");
             result &= false;
         } else {
             result = validateTerm(proposition, namespace);
         }
 
         if (StringUtils.isBlank(operatorCode)) {
             GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                     "error.rule.proposition.simple.blankField", proposition.getDescription(), "Operator");
             result &= false;
         }
 
         if (StringUtils.isBlank(propConstant) && !operatorCode.endsWith("null")) { // ==null and !=null operators have blank values.
             GlobalVariables.getMessageMap().putErrorForSectionId(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                     "error.rule.proposition.simple.blankField", proposition.getDescription(), "Value");
             result &= false;
         }  else if (operatorCode.endsWith("null")) { // ==null and !=null operators have blank values.
             if (propConstant != null) {
                 proposition.getParameters().get(1).setValue(null);
             }
         } else if (!StringUtils.isBlank(termId)) {
             // validate that the constant value is comparable against the term
             String termType = lookupTermType(termId);
 
             if (operatorCode.startsWith(KrmsImplConstants.CUSTOM_OPERATOR_PREFIX)) {
                 CustomOperator customOperator = getCustomOperatorUiTranslator().getCustomOperator(operatorCode);
                 List<RemotableAttributeError> errors = customOperator.validateOperandClasses(termType, String.class.getName());
 
                 if (!CollectionUtils.isEmpty(errors)) {
                     for (RemotableAttributeError error : errors) {
                         GlobalVariables.getMessageMap().putError(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                                 error.getMessage(), proposition.getDescription(), termType);
                     }
 
                     result &= false;
                 }
             } else {
                 ComparisonOperatorService comparisonOperatorService = KrmsApiServiceLocator.getComparisonOperatorService();
                 if (comparisonOperatorService.canCoerce(termType, propConstant)) {
                     if (comparisonOperatorService.coerce(termType, propConstant) == null) {
                         GlobalVariables.getMessageMap().putError(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                                 "error.rule.proposition.simple.invalidValue", proposition.getDescription(), propConstant);
                         result &= false;
                     }
                 }
             }
         }
 
         if (!CollectionUtils.isEmpty(proposition.getCompoundComponents())) {
             GlobalVariables.getMessageMap().putError(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                     "error.rule.proposition.simple.hasChildren", proposition.getDescription());
             result &= false; // simple prop should not have compound components
         }
 
         return result;
     }
 
     /**
      * Validate the term in the given simple proposition.  Note that this method is side-effecting,
      * when errors are detected with the proposition, errors are added to the error map.
      * @param proposition the proposition with the term to validate
      * @param namespace the namespace of the parent rule
      * @return true if the proposition's term is considered valid
      */
     private boolean validateTerm(PropositionBo proposition, String namespace) {
         boolean result = true;
 
         String termId = proposition.getParameters().get(0).getValue();
         if (termId.startsWith(KrmsImplConstants.PARAMETERIZED_TERM_PREFIX)) {
             // validate parameterized term
 
             // is the term name non-blank
             if (StringUtils.isBlank(proposition.getNewTermDescription())) {
                 GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                         "error.rule.proposition.simple.emptyTermName", proposition.getDescription());
                 result &= false;
             } else { // check if the term name is unique
 
                 Map<String, String> criteria = new HashMap<String, String>();
 
                 criteria.put("description", proposition.getNewTermDescription());
                 criteria.put("specification.namespace", namespace);
 
                 Collection<TermBo> matchingTerms =
                         KRADServiceLocator.getBusinessObjectService().findMatching(TermBo.class, criteria);
 
                 if (!CollectionUtils.isEmpty(matchingTerms)) {
                     // this is a Warning -- maybe it should be an error?
                     GlobalVariables.getMessageMap().putWarningWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                             "warning.rule.proposition.simple.duplicateTermName", proposition.getDescription());
                 }
             }
 
             String termSpecificationId = termId.substring(KrmsImplConstants.PARAMETERIZED_TERM_PREFIX.length());
 
             TermResolverDefinition termResolverDefinition =
                     AgendaEditorMaintainable.getSimplestTermResolver(termSpecificationId, namespace);
 
             if (termResolverDefinition == null) {
                 GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                         "error.rule.proposition.simple.invalidTerm", proposition.getDescription());
                 result &= false;
             } else {
                 List<String> parameterNames = new ArrayList<String>(termResolverDefinition.getParameterNames());
                 Collections.sort(parameterNames);
                 for (String parameterName : parameterNames) {
                     if (!proposition.getTermParameters().containsKey(parameterName) || 
                             StringUtils.isBlank(proposition.getTermParameters().get(parameterName))) {
                         GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                                 "error.rule.proposition.simple.missingTermParameter", proposition.getDescription());
                         result &= false;
                         break;
                     }
                 }
             }
 
         } else {
             //validate normal term
             TermDefinition termDefinition = KrmsRepositoryServiceLocator.getTermBoService().getTerm(termId);
             if (termDefinition == null) {
                 GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                         "error.rule.proposition.simple.invalidTerm", proposition.getDescription());
             } else if (!namespace.equals(termDefinition.getSpecification().getNamespace())) {
                 GlobalVariables.getMessageMap().putErrorWithoutFullErrorPath(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                         "error.rule.proposition.simple.invalidTerm", proposition.getDescription());
             }
         }
         return result;
     }
 
     /**
      * Lookup the {@link org.kuali.rice.krms.api.repository.term.TermSpecificationDefinitionContract} type.
      * @param key krms_term_t key
      * @return String the krms_term_spec_t TYP for the given krms_term_t key given
      */
     private String lookupTermType(String key) {
         TermSpecificationDefinition termSpec = null;
         if (key.startsWith(KrmsImplConstants.PARAMETERIZED_TERM_PREFIX)) {
             String termSpecificationId = key.substring(KrmsImplConstants.PARAMETERIZED_TERM_PREFIX.length());
             termSpec = KrmsRepositoryServiceLocator.getTermBoService().getTermSpecificationById(termSpecificationId);
         } else {
             TermDefinition term = KrmsRepositoryServiceLocator.getTermBoService().getTerm(key);
             if (term != null) {
                 termSpec = term.getSpecification();
             }
         }
         if (termSpec != null) {
             return termSpec.getType();
         } else {
             return null;
         }
     }
 
 
     /**
      * This method returns the agendaId of the given agenda.  If the agendaId is null a new id will be created.
      */
     private String getCreateAgendaId(AgendaBo agenda) {
         if (agenda.getId() == null) {
             agenda.setId(getSequenceAccessorService().getNextAvailableSequenceNumber("KRMS_AGENDA_S", AgendaItemBo.class).toString());
         }
         return agenda.getId();
     }
 
     private void updateRuleAction(AgendaEditor agendaEditor) {
         agendaEditor.getAgendaItemLine().getRule().setActions(new ArrayList<ActionBo>());
         if (StringUtils.isNotBlank(agendaEditor.getAgendaItemLineRuleAction().getTypeId())) {
             agendaEditor.getAgendaItemLineRuleAction().setAttributes(agendaEditor.getCustomRuleActionAttributesMap());
             agendaEditor.getAgendaItemLine().getRule().getActions().add(agendaEditor.getAgendaItemLineRuleAction());
         }
     }
 
     /**
      * Build a map from attribute name to attribute definition from all the defined attribute definitions for the
      * specified rule action type
      * @param actionTypeId
      * @return
      */
     private Map<String, KrmsAttributeDefinition> buildAttributeDefinitionMap(String actionTypeId) {
         KrmsAttributeDefinitionService attributeDefinitionService =
             KrmsRepositoryServiceLocator.getKrmsAttributeDefinitionService();
 
         // build a map from attribute name to definition
         Map<String, KrmsAttributeDefinition> attributeDefinitionMap = new HashMap<String, KrmsAttributeDefinition>();
 
         List<KrmsAttributeDefinition> attributeDefinitions =
                 attributeDefinitionService.findAttributeDefinitionsByType(actionTypeId);
 
         for (KrmsAttributeDefinition attributeDefinition : attributeDefinitions) {
             attributeDefinitionMap.put(attributeDefinition.getName(), attributeDefinition);
         }
         return attributeDefinitionMap;
     }
 
     /**
      * This method updates the existing rule in the agenda.
      */
     @RequestMapping(params = "methodToCall=" + "editRule")
     public ModelAndView editRule(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
         AgendaEditor agendaEditor = getAgendaEditor(form);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
         AgendaItemBo node = getAgendaItemById(firstItem, getSelectedAgendaItemId(form));
         AgendaItemBo agendaItemLine = agendaEditor.getAgendaItemLine();
 
         if (!validateProposition(agendaItemLine.getRule().getProposition(), agendaItemLine.getRule().getNamespace())) {
             form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-EditRule-Page");
             // NOTICE short circuit method on invalid proposition
             return super.navigate(form, result, request, response);
         }
 
         agendaItemLine.getRule().setAttributes(agendaEditor.getCustomRuleAttributesMap());
         updateRuleAction(agendaEditor);
 
         AgendaEditorBusRule rule = new AgendaEditorBusRule();
         MaintenanceDocumentForm maintenanceForm = (MaintenanceDocumentForm) form;
         MaintenanceDocument document = maintenanceForm.getDocument();
         if (rule.processAgendaItemBusinessRules(document)) {
             node.setRule(agendaItemLine.getRule());
             form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-Agenda-Page");
         } else {
             form.getActionParameters().put(UifParameters.NAVIGATE_TO_PAGE_ID, "AgendaEditorView-EditRule-Page");
         }
         return super.navigate(form, result, request, response);
     }
 
     /**
      * @return the ALWAYS {@link AgendaItemInstanceChildAccessor} for the last ALWAYS child of the instance accessed by the parameter.
      * It will by definition refer to null.  If the instanceAccessor parameter refers to null, then it will be returned.  This is useful
      * for adding a youngest child to a sibling group.
      */
     private AgendaItemInstanceChildAccessor getLastChildsAlwaysAccessor(AgendaItemInstanceChildAccessor instanceAccessor) {
         AgendaItemBo next = instanceAccessor.getChild();
         if (next == null) return instanceAccessor;
         while (next.getAlways() != null) { next = next.getAlways(); };
         return new AgendaItemInstanceChildAccessor(AgendaItemChildAccessor.always, next);
     }
 
     /**
      * @return the accessor to the child with the given agendaItemId under the given parent.  This method will search both When TRUE and 
      * When FALSE sibling groups.  If the instance with the given id is not found, null is returned.
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private AgendaItemInstanceChildAccessor getInstanceAccessorToChild(AgendaItemBo parent, String agendaItemId) {
 
         // first try When TRUE, then When FALSE via AgendaItemChildAccessor.levelOrderChildren
         for (AgendaItemChildAccessor levelOrderChildAccessor : AgendaItemChildAccessor.children) {
 
             AgendaItemBo next = levelOrderChildAccessor.getChild(parent);
             
             // if the first item matches, return the accessor from the parent
             if (next != null && agendaItemId.equals(next.getId())) return new AgendaItemInstanceChildAccessor(levelOrderChildAccessor, parent);
 
             // otherwise walk the children
             while (next != null && next.getAlwaysId() != null) {
                 if (next.getAlwaysId().equals(agendaItemId)) return new AgendaItemInstanceChildAccessor(AgendaItemChildAccessor.always, next);
                 // move down
                 next = next.getAlways();
             }
         }
         
         return null;
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxRefresh")
     public ModelAndView ajaxRefresh(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     @RequestMapping(params = "methodToCall=" + "moveUp")
     public ModelAndView moveUp(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         moveSelectedSubtreeUp(form);
 
         return super.refresh(form, result, request, response);
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxMoveUp")
     public ModelAndView ajaxMoveUp(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         moveSelectedSubtreeUp(form);
 
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     /**
      * Exposes Ajax callback to UI to validate entered rule name to copy
      * @param name the copyRuleName
      * @param namespace the rule namespace
      * @return true or false
      */
     @RequestMapping(params = "methodToCall=" + "ajaxValidRuleName", method=RequestMethod.GET)
     public @ResponseBody boolean ajaxValidRuleName(@RequestParam String name, @RequestParam String namespace) {
         return (getRuleBoService().getRuleByNameAndNamespace(name, namespace) != null);
     }
 
     /**
      *
      * @param form
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private void moveSelectedSubtreeUp(UifFormBase form) {
 
         /* Rough algorithm for moving a node up.  This is a "level order" move.  Note that in this tree,
          * level order means something a bit funky.  We are defining a level as it would be displayed in the browser,
          * so only the traversal of When FALSE or When TRUE links increments the level, since ALWAYS linked nodes are
          * considered siblings.
          *
          * find the following:
          *   node := the selected node
          *   parent := the selected node's parent, its containing node (via when true or when false relationship)
          *   parentsOlderCousin := the parent's level-order predecessor (sibling or cousin)
          *
          * if (node is first child in sibling group)
          *     if (node is in When FALSE group)
          *         move node to last position in When TRUE group
          *     else
          *         find youngest child of parentsOlderCousin and put node after it
          * else
          *     move node up within its sibling group
          */
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
 
         String selectedItemId = agendaEditor.getSelectedAgendaItemId();
         AgendaItemBo node = getAgendaItemById(firstItem, selectedItemId);
         AgendaItemBo parent = getParent(firstItem, selectedItemId);
         AgendaItemBo parentsOlderCousin = (parent == null) ? null : getNextOldestOfSameGeneration(firstItem, parent);
 
         StringBuilder ruleEditorMessage = new StringBuilder();
         AgendaItemChildAccessor childAccessor = getOldestChildAccessor(node, parent);
         if (childAccessor != null) { // node is first child in sibling group
             if (childAccessor == AgendaItemChildAccessor.whenFalse) {
                 // move node to last position in When TRUE group
                 AgendaItemInstanceChildAccessor youngestWhenTrueSiblingInsertionPoint =
                         getLastChildsAlwaysAccessor(new AgendaItemInstanceChildAccessor(AgendaItemChildAccessor.whenTrue, parent));
                 youngestWhenTrueSiblingInsertionPoint.setChild(node);
                 AgendaItemChildAccessor.whenFalse.setChild(parent, node.getAlways());
                 AgendaItemChildAccessor.always.setChild(node, null);
 
                 ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" up ");
                 ruleEditorMessage.append("to last position in When TRUE group of ").append(parent.getRule().getName());
             } else if (parentsOlderCousin != null) {
                 // find youngest child of parentsOlderCousin and put node after it
                 AgendaItemInstanceChildAccessor youngestWhenFalseSiblingInsertionPoint =
                         getLastChildsAlwaysAccessor(new AgendaItemInstanceChildAccessor(AgendaItemChildAccessor.whenFalse, parentsOlderCousin));
                 youngestWhenFalseSiblingInsertionPoint.setChild(node);
                 AgendaItemChildAccessor.whenTrue.setChild(parent, node.getAlways());
                 AgendaItemChildAccessor.always.setChild(node, null);
                 ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" up ");
                 ruleEditorMessage.append("to When FALSE group of ").append(parentsOlderCousin.getRule().getName());
             }
         } else if (!selectedItemId.equals(firstItem.getId())) { // conditional to miss special case of first node
 
             AgendaItemBo bogusRootNode = null;
             if (parent == null) {
                 // special case, this is a top level sibling. rig up special parent node
                 bogusRootNode = new AgendaItemBo();
                 AgendaItemChildAccessor.whenTrue.setChild(bogusRootNode, firstItem);
                 parent = bogusRootNode;
             }
 
             // move node up within its sibling group
             AgendaItemInstanceChildAccessor accessorToSelectedNode = getInstanceAccessorToChild(parent, node.getId());
             AgendaItemBo olderSibling = accessorToSelectedNode.getInstance();
             AgendaItemInstanceChildAccessor accessorToOlderSibling = getInstanceAccessorToChild(parent, olderSibling.getId());
 
             accessorToOlderSibling.setChild(node);
             accessorToSelectedNode.setChild(node.getAlways());
             AgendaItemChildAccessor.always.setChild(node, olderSibling);
 
             ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" up ");
 
             if (bogusRootNode != null) {
                 // clean up special case with bogus root node
                 agendaEditor.getAgenda().setFirstItemId(bogusRootNode.getWhenTrueId());
                 ruleEditorMessage.append(" to ").append(getFirstAgendaItem(agendaEditor.getAgenda()).getRule().getName()).append(" When TRUE group");
             } else {
                 ruleEditorMessage.append(" within its sibling group, above " + olderSibling.getRule().getName());
             }
         }
         agendaEditor.setRuleEditorMessage(ruleEditorMessage.toString());
     }
 
     @RequestMapping(params = "methodToCall=" + "moveDown")
     public ModelAndView moveDown(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         moveSelectedSubtreeDown(form);
         
         return super.refresh(form, result, request, response);
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxMoveDown")
     public ModelAndView ajaxMoveDown(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         moveSelectedSubtreeDown(form);
 
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     /**
      *
      * @param form
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private void moveSelectedSubtreeDown(UifFormBase form) {
 
         /* Rough algorithm for moving a node down.  This is a "level order" move.  Note that in this tree,
          * level order means something a bit funky.  We are defining a level as it would be displayed in the browser,
          * so only the traversal of When FALSE or When TRUE links increments the level, since ALWAYS linked nodes are
          * considered siblings.
          *
          * find the following:
          *   node := the selected node
          *   parent := the selected node's parent, its containing node (via when true or when false relationship)
          *   parentsYoungerCousin := the parent's level-order successor (sibling or cousin)
          *
          * if (node is last child in sibling group)
          *     if (node is in When TRUE group)
          *         move node to first position in When FALSE group
          *     else
          *         move to first child of parentsYoungerCousin
          * else
          *     move node down within its sibling group
          */
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
 
         String selectedItemId = agendaEditor.getSelectedAgendaItemId();
         AgendaItemBo node = getAgendaItemById(firstItem, selectedItemId);
         AgendaItemBo parent = getParent(firstItem, selectedItemId);
         AgendaItemBo parentsYoungerCousin = (parent == null) ? null : getNextYoungestOfSameGeneration(firstItem, parent);
 
         StringBuilder ruleEditorMessage = new StringBuilder();
         if (node.getAlways() == null && parent != null) { // node is last child in sibling group
             // set link to selected node to null
             if (parent.getWhenTrue() != null && isSiblings(parent.getWhenTrue(), node)) { // node is in When TRUE group
                 // move node to first child under When FALSE
                 AgendaItemInstanceChildAccessor accessorToSelectedNode = getInstanceAccessorToChild(parent, node.getId());
                 accessorToSelectedNode.setChild(null);
 
                 AgendaItemBo parentsFirstChild = parent.getWhenFalse();
                 AgendaItemChildAccessor.whenFalse.setChild(parent, node);
                 AgendaItemChildAccessor.always.setChild(node, parentsFirstChild);
 
                 ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" down ");
                 ruleEditorMessage.append("to first child under When FALSE group of ").append(parent.getRule().getName());
             } else if (parentsYoungerCousin != null) { // node is in the When FALSE group
                 // move to first child of parentsYoungerCousin under When TRUE
                 AgendaItemInstanceChildAccessor accessorToSelectedNode = getInstanceAccessorToChild(parent, node.getId());
                 accessorToSelectedNode.setChild(null);
 
                 AgendaItemBo parentsYoungerCousinsFirstChild = parentsYoungerCousin.getWhenTrue();
                 AgendaItemChildAccessor.whenTrue.setChild(parentsYoungerCousin, node);
                 AgendaItemChildAccessor.always.setChild(node, parentsYoungerCousinsFirstChild);
 
                 ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" down ");
                 ruleEditorMessage.append("to first child under When TRUE group of ").append(parentsYoungerCousin.getRule().getName());
             }
         } else if (node.getAlways() != null) { // move node down within its sibling group
 
             AgendaItemBo bogusRootNode = null;
             if (parent == null) {
                 // special case, this is a top level sibling. rig up special parent node
 
                 bogusRootNode = new AgendaItemBo();
                 AgendaItemChildAccessor.whenFalse.setChild(bogusRootNode, firstItem);
                 parent = bogusRootNode;
             }
 
             // move node down within its sibling group
             AgendaItemInstanceChildAccessor accessorToSelectedNode = getInstanceAccessorToChild(parent, node.getId());
             AgendaItemBo youngerSibling = node.getAlways();
             accessorToSelectedNode.setChild(youngerSibling);
             AgendaItemChildAccessor.always.setChild(node, youngerSibling.getAlways());
             AgendaItemChildAccessor.always.setChild(youngerSibling, node);
 
             if (bogusRootNode != null) {
                 // clean up special case with bogus root node
                 agendaEditor.getAgenda().setFirstItemId(bogusRootNode.getWhenFalseId());
             }
             ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" down ");
             ruleEditorMessage.append(" within its sibling group, below ").append(youngerSibling.getRule().getName());
         } // falls through if already bottom-most
         agendaEditor.setRuleEditorMessage(ruleEditorMessage.toString());
     }
 
     @RequestMapping(params = "methodToCall=" + "moveLeft")
     public ModelAndView moveLeft(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         moveSelectedSubtreeLeft(form);
         
         return super.refresh(form, result, request, response);
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxMoveLeft")
     public ModelAndView ajaxMoveLeft(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         moveSelectedSubtreeLeft(form);
 
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     /**
      *
      * @param form
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private void moveSelectedSubtreeLeft(UifFormBase form) {
 
         /*
          * Move left means make it a younger sibling of it's parent.
          */
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
 
         String selectedItemId = agendaEditor.getSelectedAgendaItemId();
         AgendaItemBo node = getAgendaItemById(firstItem, selectedItemId);
         AgendaItemBo parent = getParent(firstItem, selectedItemId);
 
         if (parent != null) {
             AgendaItemInstanceChildAccessor accessorToSelectedNode = getInstanceAccessorToChild(parent, node.getId());
             accessorToSelectedNode.setChild(node.getAlways());
             AgendaItemChildAccessor.always.setChild(node, parent.getAlways());
             AgendaItemChildAccessor.always.setChild(parent, node);
 
             StringBuilder ruleEditorMessage = new StringBuilder();
             ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" left to be a sibling of its parent ").append(parent.getRule().getName());
             agendaEditor.setRuleEditorMessage(ruleEditorMessage.toString());
         }
     }
 
 
     @RequestMapping(params = "methodToCall=" + "moveRight")
     public ModelAndView moveRight(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         moveSelectedSubtreeRight(form);
 
         return super.refresh(form, result, request, response);
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxMoveRight")
     public ModelAndView ajaxMoveRight(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         moveSelectedSubtreeRight(form);
 
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     /**
      *
      * @param form
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private void moveSelectedSubtreeRight(UifFormBase form) {
 
         /*
          * Move right prefers moving to bottom of upper sibling's When FALSE branch
          * ... otherwise ..
          * moves to top of lower sibling's When TRUE branch
          */
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
 
         String selectedItemId = agendaEditor.getSelectedAgendaItemId();
         AgendaItemBo node = getAgendaItemById(firstItem, selectedItemId);
         AgendaItemBo parent = getParent(firstItem, selectedItemId);
 
         AgendaItemBo bogusRootNode = null;
         if (parent == null) {
             // special case, this is a top level sibling. rig up special parent node
             bogusRootNode = new AgendaItemBo();
             AgendaItemChildAccessor.whenFalse.setChild(bogusRootNode, firstItem);
             parent = bogusRootNode;
         }
 
         AgendaItemInstanceChildAccessor accessorToSelectedNode = getInstanceAccessorToChild(parent, node.getId());
         AgendaItemBo olderSibling = (accessorToSelectedNode.getInstance() == parent) ? null : accessorToSelectedNode.getInstance();
 
         StringBuilder ruleEditorMessage = new StringBuilder();
         if (olderSibling != null) {
             accessorToSelectedNode.setChild(node.getAlways());
             AgendaItemInstanceChildAccessor yougestWhenFalseSiblingInsertionPoint =
                     getLastChildsAlwaysAccessor(new AgendaItemInstanceChildAccessor(AgendaItemChildAccessor.whenFalse, olderSibling));
             yougestWhenFalseSiblingInsertionPoint.setChild(node);
             AgendaItemChildAccessor.always.setChild(node, null);
 
             ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" right to ");
             ruleEditorMessage.append(olderSibling.getRule().getName()).append(" When FALSE group.");
         } else if (node.getAlways() != null) { // has younger sibling
             accessorToSelectedNode.setChild(node.getAlways());
             AgendaItemBo childsWhenTrue = node.getAlways().getWhenTrue();
             AgendaItemChildAccessor.whenTrue.setChild(node.getAlways(), node);
             AgendaItemChildAccessor.always.setChild(node, childsWhenTrue);
 
             ruleEditorMessage.append("Moved ").append(node.getRule().getName()).append(" right to ");
             if (childsWhenTrue != null) { // childsWhenTrue is null if the topmost rule is moved right see bogusRootNode below
                 ruleEditorMessage.append(childsWhenTrue.getRule().getName()).append(" When TRUE group");
             }
         } // falls through if node is already the rightmost.
 
         if (bogusRootNode != null) {
             // clean up special case with bogus root node
             agendaEditor.getAgenda().setFirstItemId(bogusRootNode.getWhenFalseId());
             ruleEditorMessage.append(getFirstAgendaItem(agendaEditor.getAgenda()).getRule().getName()).append(" When TRUE group");
         }
         agendaEditor.setRuleEditorMessage(ruleEditorMessage.toString());
     }
 
     /**
      *
      * @param cousin1
      * @param cousin2
      * @return
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private boolean isSiblings(AgendaItemBo cousin1, AgendaItemBo cousin2) {
         if (cousin1.equals(cousin2)) return true; // this is a bit abusive
         
         // can you walk to c1 from ALWAYS links of c2?
         AgendaItemBo candidate = cousin2;
         while (null != (candidate = candidate.getAlways())) {
             if (candidate.equals(cousin1)) return true;
         }
         // can you walk to c2 from ALWAYS links of c1?
         candidate = cousin1;
         while (null != (candidate = candidate.getAlways())) {
             if (candidate.equals(cousin2)) return true;
         }
         return false;
     }
 
     /**
      * This method returns the level order accessor (getWhenTrue or getWhenFalse) that relates the parent directly 
      * to the child.  If the two nodes don't have such a relationship, null is returned. 
      * Note that this only finds accessors for oldest children, not younger siblings.
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private AgendaItemChildAccessor getOldestChildAccessor(
             AgendaItemBo child, AgendaItemBo parent) {
         AgendaItemChildAccessor levelOrderChildAccessor = null;
         
         if (parent != null) {
             for (AgendaItemChildAccessor childAccessor : AgendaItemChildAccessor.children) {
                 if (child.equals(childAccessor.getChild(parent))) {
                     levelOrderChildAccessor = childAccessor;
                     break;
                 }
             }
         }
         return levelOrderChildAccessor;
     }
     
     /**
      * This method finds and returns the first agenda item in the agenda, or null if there are no items presently
      * 
      * @param agenda
      * @return
      */
     private AgendaItemBo getFirstAgendaItem(AgendaBo agenda) {
         AgendaItemBo firstItem = null;
         if (agenda != null && agenda.getItems() != null) for (AgendaItemBo agendaItem : agenda.getItems()) {
             if (agenda.getFirstItemId().equals(agendaItem.getId())) {
                 firstItem = agendaItem;
                 break;
             }
         }
         return firstItem;
     }
     
     /**
      * @return the closest younger sibling of the agenda item with the given ID, and if there is no such sibling, the closest younger cousin.
      * If there is no such cousin either, then null is returned.
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private AgendaItemBo getNextYoungestOfSameGeneration(AgendaItemBo root, AgendaItemBo agendaItem) {
 
         int genNumber = getAgendaItemGenerationNumber(0, root, agendaItem.getId());
         List<AgendaItemBo> genList = new ArrayList<AgendaItemBo>();
         buildAgendaItemGenerationList(genList, root, 0, genNumber);
 
         int itemIndex = genList.indexOf(agendaItem);
         if (genList.size() > itemIndex + 1) return genList.get(itemIndex + 1);
 
         return null;
     }
 
     /**
      *
      * @param currentLevel
      * @param node
      * @param agendaItemId
      * @return
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private int getAgendaItemGenerationNumber(int currentLevel, AgendaItemBo node, String agendaItemId) {
         int result = -1;
         if (agendaItemId.equals(node.getId())) {
             result = currentLevel;
         } else {
             for (AgendaItemChildAccessor childAccessor : AgendaItemChildAccessor.linkedNodes) {
                 AgendaItemBo child = childAccessor.getChild(node);
                 if (child != null) {
                     int nextLevel = currentLevel;
                     // we don't change the level order parent when we traverse ALWAYS links
                     if (childAccessor != AgendaItemChildAccessor.always) {
                         nextLevel = currentLevel +1;
                     }
                     result = getAgendaItemGenerationNumber(nextLevel, child, agendaItemId);
                     if (result != -1) break;
                 }
             }
         }
         return result;
     }
 
     /**
      *
      * @param genList
      * @param node
      * @param currentLevel
      * @param generation
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private void buildAgendaItemGenerationList(List<AgendaItemBo> genList, AgendaItemBo node, int currentLevel, int generation) {
         if (currentLevel == generation) {
             genList.add(node);
         }
 
         if (currentLevel > generation) return;
 
         for (AgendaItemChildAccessor childAccessor : AgendaItemChildAccessor.linkedNodes) {
             AgendaItemBo child = childAccessor.getChild(node);
             if (child != null) {
                 int nextLevel = currentLevel;
                 // we don't change the level order parent when we traverse ALWAYS links
                 if (childAccessor != AgendaItemChildAccessor.always) {
                     nextLevel = currentLevel +1;
                 }
                 buildAgendaItemGenerationList(genList, child, nextLevel, generation);
             }
         }
     }
 
     /**
      * @return the closest older sibling of the agenda item with the given ID, and if there is no such sibling, the closest older cousin.
      * If there is no such cousin either, then null is returned.
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private AgendaItemBo getNextOldestOfSameGeneration(AgendaItemBo root, AgendaItemBo agendaItem) {
 
         int genNumber = getAgendaItemGenerationNumber(0, root, agendaItem.getId());
         List<AgendaItemBo> genList = new ArrayList<AgendaItemBo>();
         buildAgendaItemGenerationList(genList, root, 0, genNumber);
 
         int itemIndex = genList.indexOf(agendaItem);
         if (itemIndex >= 1) return genList.get(itemIndex - 1);
 
         return null;
     }
     
 
     /**
      * returns the parent of the item with the passed in id.  Note that {@link AgendaItemBo}s related by ALWAYS relationships are considered siblings.
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private AgendaItemBo getParent(AgendaItemBo root, String agendaItemId) {
         return getParentHelper(root, null, agendaItemId);
     }
 
     /**
      *
      * @param node
      * @param levelOrderParent
      * @param agendaItemId
      * @return
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private AgendaItemBo getParentHelper(AgendaItemBo node, AgendaItemBo levelOrderParent, String agendaItemId) {
         AgendaItemBo result = null;
         if (agendaItemId.equals(node.getId())) {
             result = levelOrderParent;
         } else {
             for (AgendaItemChildAccessor childAccessor : AgendaItemChildAccessor.linkedNodes) {
                 AgendaItemBo child = childAccessor.getChild(node);
                 if (child != null) {
                     // we don't change the level order parent when we traverse ALWAYS links 
                     AgendaItemBo lop = (childAccessor == AgendaItemChildAccessor.always) ? levelOrderParent : node;
                     result = getParentHelper(child, lop, agendaItemId);
                     if (result != null) break;
                 }
             }
         }
         return result;
     }
 
     /**
      * Search the tree for the agenda item with the given id.
      */
     private AgendaItemBo getAgendaItemById(AgendaItemBo node, String agendaItemId) {
         if (node == null) throw new IllegalArgumentException("node must be non-null");
 
         AgendaItemBo result = null;
         
         if (agendaItemId.equals(node.getId())) {
             result = node;
         } else {
             for (AgendaItemChildAccessor childAccessor : AgendaItemChildAccessor.linkedNodes) {
                 AgendaItemBo child = childAccessor.getChild(node);
                 if (child != null) {
                     result = getAgendaItemById(child, agendaItemId);
                     if (result != null) break;
                 }
             }
         } 
         return result;
     }
 
     /**
      * @param form
      * @return the {@link AgendaEditor} from the form
      */
     private AgendaEditor getAgendaEditor(UifFormBase form) {
         MaintenanceDocumentForm maintenanceForm = (MaintenanceDocumentForm) form;
         return ((AgendaEditor)maintenanceForm.getDocument().getDocumentDataObject());
     }
 
     private void treeToInOrderList(AgendaItemBo agendaItem, List<AgendaItemBo> listToBuild) {
         listToBuild.add(agendaItem);
         for (AgendaItemChildAccessor childAccessor : AgendaItemChildAccessor.linkedNodes) {
             AgendaItemBo child = childAccessor.getChild(agendaItem);
             if (child != null) treeToInOrderList(child, listToBuild);
         }
     }
 
     
     @RequestMapping(params = "methodToCall=" + "delete")
     public ModelAndView delete(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         deleteSelectedSubtree(form);
 
         return super.refresh(form, result, request, response);
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxDelete")
     public ModelAndView ajaxDelete(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         deleteSelectedSubtree(form);
 
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     
     private void deleteSelectedSubtree(UifFormBase form) {
         AgendaEditor agendaEditor = getAgendaEditor(form);
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
 
         if (firstItem != null) {
             String agendaItemSelected = agendaEditor.getSelectedAgendaItemId();
             AgendaItemBo selectedItem = getAgendaItemById(firstItem, agendaItemSelected);
 
             // need to handle the first item here, our recursive method won't handle it.
             if (agendaItemSelected.equals(firstItem.getId())) {
                 agendaEditor.getAgenda().setFirstItemId(firstItem.getAlwaysId());
             } else {
                 deleteAgendaItem(firstItem, agendaItemSelected);
             }
 
             StringBuilder ruleEditorMessage = new StringBuilder();
             ruleEditorMessage.append("Deleted ").append(selectedItem.getRule().getName());
             // remove agenda item and its whenTrue & whenFalse children from the list of agendaItems of the agenda
             if (selectedItem.getWhenTrue() != null) {
                 removeAgendaItem(agendaEditor.getAgenda().getItems(), selectedItem.getWhenTrue());
                 ruleEditorMessage.append(" and its When TRUE ").append(selectedItem.getWhenTrue().getRule().getName());
             }
             if (selectedItem.getWhenFalse() != null) {
                 removeAgendaItem(agendaEditor.getAgenda().getItems(), selectedItem.getWhenFalse());
                 ruleEditorMessage.append(" and its When FALSE ").append(selectedItem.getWhenFalse().getRule().getName());
             }
             agendaEditor.getAgenda().getItems().remove(selectedItem);
             agendaEditor.setRuleEditorMessage(ruleEditorMessage.toString());
         }
     }
 
     private void deleteAgendaItem(AgendaItemBo root, String agendaItemIdToDelete) {
         if (deleteAgendaItem(root, AgendaItemChildAccessor.whenTrue, agendaItemIdToDelete) || 
                 deleteAgendaItem(root, AgendaItemChildAccessor.whenFalse, agendaItemIdToDelete) || 
                 deleteAgendaItem(root, AgendaItemChildAccessor.always, agendaItemIdToDelete)); // TODO: this is confusing, refactor
     }
     
     private boolean deleteAgendaItem(AgendaItemBo agendaItem, AgendaItemChildAccessor childAccessor, String agendaItemIdToDelete) {
         if (agendaItem == null || childAccessor.getChild(agendaItem) == null) return false;
         if (agendaItemIdToDelete.equals(childAccessor.getChild(agendaItem).getId())) {
             // delete the child in such a way that any ALWAYS children don't get lost from the tree
             AgendaItemBo grandchildToKeep = childAccessor.getChild(agendaItem).getAlways();
             childAccessor.setChild(agendaItem, grandchildToKeep);
             return true;
         } else {
             AgendaItemBo child = childAccessor.getChild(agendaItem);
             // recurse
             for (AgendaItemChildAccessor nextChildAccessor : AgendaItemChildAccessor.linkedNodes) {
                 if (deleteAgendaItem(child, nextChildAccessor, agendaItemIdToDelete)) return true;
             }
         }
         return false;
     }
 
     /**
      * Recursively delete the agendaItem and its children from the agendaItemBo list.
      * @param items, the list of agendaItemBo that the agenda holds
      * @param removeAgendaItem, the agendaItemBo to be removed
      */
     private void removeAgendaItem(List<AgendaItemBo> items, AgendaItemBo removeAgendaItem) {
         if (removeAgendaItem.getWhenTrue() != null) {
             removeAgendaItem(items, removeAgendaItem.getWhenTrue());
         }
         if (removeAgendaItem.getWhenFalse() != null) {
             removeAgendaItem(items, removeAgendaItem.getWhenFalse());
         }
         if (removeAgendaItem.getAlways() != null) {
             removeAgendaItem(items, removeAgendaItem.getAlways());
         }
         items.remove(removeAgendaItem);
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxCut")
     public ModelAndView ajaxCut(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
         String selectedItemId = agendaEditor.getSelectedAgendaItemId();
 
         AgendaItemBo selectedAgendaItem = getAgendaItemById(firstItem, selectedItemId);
         setCutAgendaItemId(form, selectedItemId);
 
         StringBuilder ruleEditorMessage = new StringBuilder();
         ruleEditorMessage.append("Marked ").append(selectedAgendaItem.getRule().getName()).append(" for cutting.");
         agendaEditor.setRuleEditorMessage(ruleEditorMessage.toString());
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     @RequestMapping(params = "methodToCall=" + "ajaxPaste")
     public ModelAndView ajaxPaste(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         // this is the root of the tree:
         AgendaItemBo firstItem = getFirstAgendaItem(agendaEditor.getAgenda());
         String selectedItemId = agendaEditor.getSelectedAgendaItemId();
 
         String agendaItemId = getCutAgendaItemId(form);
         if (StringUtils.isNotBlank(selectedItemId) && StringUtils.isNotBlank(agendaItemId)) {
             StringBuilder ruleEditorMessage = new StringBuilder();
             AgendaItemBo node = getAgendaItemById(firstItem, agendaItemId);
             AgendaItemBo orgRefNode = getReferringNode(firstItem, agendaItemId);
             AgendaItemBo newRefNode = getAgendaItemById(firstItem, selectedItemId);
 
             if (isSameOrChildNode(node, newRefNode)) {
                 // note if the cut agenda item is not cleared, then the javascript on the AgendaEditorView will need to be
                 // updated to deal with a paste that doesn't paste.  As the ui disables the paste button after it is clicked
                 ruleEditorMessage.append("Cannot paste ").append(node.getRule().getName()).append(" to itself.");
             } else {
                 // remove node
                 if (orgRefNode == null) {
                     agendaEditor.getAgenda().setFirstItemId(node.getAlwaysId());
                 } else {
                     // determine if true, false or always
                     // do appropriate operation
                     if (node.getId().equals(orgRefNode.getWhenTrueId())) {
                         orgRefNode.setWhenTrueId(node.getAlwaysId());
                         orgRefNode.setWhenTrue(node.getAlways());
                     } else if(node.getId().equals(orgRefNode.getWhenFalseId())) {
                         orgRefNode.setWhenFalseId(node.getAlwaysId());
                         orgRefNode.setWhenFalse(node.getAlways());
                     } else {
                         orgRefNode.setAlwaysId(node.getAlwaysId());
                         orgRefNode.setAlways(node.getAlways());
                     }
                 }
 
                 // insert node
                 node.setAlwaysId(newRefNode.getAlwaysId());
                 node.setAlways(newRefNode.getAlways());
                 newRefNode.setAlwaysId(node.getId());
                 newRefNode.setAlways(node);
 
                 ruleEditorMessage.append(" Pasted ").append(node.getRule().getName());
                 ruleEditorMessage.append(" to ").append(newRefNode.getRule().getName());
                 agendaEditor.setRuleEditorMessage(ruleEditorMessage.toString());
 
             }
             setCutAgendaItemId(form, null);
         }
 
 
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     /**
      * Updates to the category call back to this method to set the categoryId appropriately
      * TODO: shouldn't this happen automatically?  We're taking it out of the form by hand here
      */
     @RequestMapping(params = "methodToCall=" + "ajaxCategoryChangeRefresh")
     public ModelAndView ajaxCategoryChangeRefresh(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         String categoryParamName = null;
         Enumeration paramNames = request.getParameterNames();
         while (paramNames.hasMoreElements()) {
             String paramName = paramNames.nextElement().toString();
             if (paramName.endsWith("categoryId")) {
                 categoryParamName = paramName;
                 break;
             }
         }
 
         if (categoryParamName != null) {
             String categoryId = request.getParameter(categoryParamName);
 
             if (StringUtils.isBlank(categoryId)) { categoryId = null; }
 
             AgendaEditor agendaEditor = getAgendaEditor(form);
             RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
             String selectedPropId = agendaEditor.getSelectedPropositionId();
 
             // TODO: This should work even if the prop isn't selected!!!  Find the node in edit mode?
             if (!StringUtils.isBlank(selectedPropId)) {
                 Node<RuleTreeNode, String> selectedPropositionNode =
                         findPropositionTreeNode(rule.getPropositionTree().getRootElement(), selectedPropId);
                 selectedPropositionNode.getData().getProposition().setCategoryId(categoryId);
             }
         }
 
         return ajaxRefresh(form, result, request, response);
     }
 
     /**
      * This method checks if the node is the same as the new parent node or a when-true/when-fase
      * child of the new parent node.
      *
      * @param node - the node to be checked if it's the same or a child
      * @param newParent - the parent node to check against
      * @return true if same or child, false otherwise
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private boolean isSameOrChildNode(AgendaItemBo node, AgendaItemBo newParent) {
         return isSameOrChildNodeHelper(node, newParent, AgendaItemChildAccessor.children);
     }
 
     private boolean isSameOrChildNodeHelper(AgendaItemBo node, AgendaItemBo newParent, AgendaItemChildAccessor[] childAccessors) {
         boolean result = false;
         if (newParent == null || node == null) {
             return false;
         }
         if (StringUtils.equals(node.getId(), newParent.getId())) {
             result = true;
         } else {
             for (AgendaItemChildAccessor childAccessor : childAccessors) {
                 AgendaItemBo child = childAccessor.getChild(node);
                 if (child != null) {
                     result = isSameOrChildNodeHelper(child, newParent, AgendaItemChildAccessor.linkedNodes);
                     if (result == true) break;
                 }
             }
         }
         return result;
     }
 
     /**
      * This method returns the node that points to the specified agendaItemId.
      * (returns the next older sibling or the parent if no older sibling exists)
      *
      * @param root - the first agenda item of the agenda
      * @param agendaItemId - agenda item id of the agenda item whose referring node is to be returned
      * @return AgendaItemBo that points to the specified agenda item
      * @see AgendaItemChildAccessor for nomenclature explanation
      */
     private AgendaItemBo getReferringNode(AgendaItemBo root, String agendaItemId) {
         return getReferringNodeHelper(root, null, agendaItemId);
     }
 
     private AgendaItemBo getReferringNodeHelper(AgendaItemBo node, AgendaItemBo referringNode, String agendaItemId) {
         AgendaItemBo result = null;
         if (agendaItemId.equals(node.getId())) {
             result = referringNode;
         } else {
             for (AgendaItemChildAccessor childAccessor : AgendaItemChildAccessor.linkedNodes) {
                 AgendaItemBo child = childAccessor.getChild(node);
                 if (child != null) {
                     result = getReferringNodeHelper(child, node, agendaItemId);
                     if (result != null) break;
                 }
             }
         }
         return result;
     }
 
     /**
      *  return the sequenceAssessorService
      */
     private SequenceAccessorService getSequenceAccessorService() {
         if ( sequenceAccessorService == null ) {
             sequenceAccessorService = KRADServiceLocator.getSequenceAccessorService();
         }
         return sequenceAccessorService;
     }
 
     private FunctionBoService getFunctionBoService() {
         return KrmsRepositoryServiceLocator.getFunctionBoService();
     }
 
     /**
      * return the contextBoService
      */
     private ContextBoService getContextBoService() {
         return KrmsRepositoryServiceLocator.getContextBoService();
     }
 
     /**
      * return the contextBoService
      */
     private RuleBoService getRuleBoService() {
         return KrmsRepositoryServiceLocator.getRuleBoService();
     }
 
     private CustomOperatorUiTranslator getCustomOperatorUiTranslator() {
         return KrmsServiceLocatorInternal.getCustomOperatorUiTranslator();
     }
 
     /**
      * binds a child accessor to an AgendaItemBo instance.  An {@link AgendaItemInstanceChildAccessor} allows you to
      * get and set the referent
      */
     private static class AgendaItemInstanceChildAccessor {
         
         private final AgendaItemChildAccessor accessor;
         private final AgendaItemBo instance;
 
         public AgendaItemInstanceChildAccessor(AgendaItemChildAccessor accessor, AgendaItemBo instance) {
             this.accessor = accessor;
             this.instance = instance;
         }
         
         public void setChild(AgendaItemBo child) {
             accessor.setChild(instance, child);
         }
         
         public AgendaItemBo getChild() {
             return accessor.getChild(instance);
         }
         
         public AgendaItemBo getInstance() { return instance; }
     }
     
     /**
      * <p>This class abstracts getting and setting a child of an AgendaItemBo, making some recursive operations
      * require less boiler plate.</p>
      *
      * <p>The word 'child' in AgendaItemChildAccessor means child in the strict data structures sense, in that the
      * instance passed in holds a reference to some other node (or null).  However, when discussing the agenda tree
      * and algorithms for manipulating it, the meaning of 'child' is somewhat different, and there are notions of
      * 'sibling' and 'cousin' that are tossed about too. It's probably worth explaining that somewhat here:</p>
      *
      * <p>General principals of relationships when talking about the agenda tree:
      * <ul>
      * <li>Generation boundaries (parent to child) are across 'When TRUE' and 'When FALSE' references.</li>
      * <li>"Age" among siblings & cousins goes from top (oldest) to bottom (youngest).</li>
      * <li>siblings are related by 'Always' references.</li>
      * </ul>
      * </p>
      * <p>This diagram of an agenda tree and the following examples seek to illustrate these principals:</p>
      * <img src="doc-files/AgendaEditorController-1.png" alt="Example Agenda Items"/>
      * <p>Examples:
      * <ul>
      * <li>A is the parent of B, C, & D</li>
      * <li>E is the younger sibling of A</li>
      * <li>B is the older cousin of C</li>
      * <li>C is the older sibling of D</li>
      * <li>F is the younger cousin of D</li>
      * </ul>
      * </p>
      */
     protected static class AgendaItemChildAccessor {
         
         private enum Child { WHEN_TRUE, WHEN_FALSE, ALWAYS };
         
         private static final AgendaItemChildAccessor whenTrue = new AgendaItemChildAccessor(Child.WHEN_TRUE); 
         private static final AgendaItemChildAccessor whenFalse = new AgendaItemChildAccessor(Child.WHEN_FALSE); 
         private static final AgendaItemChildAccessor always = new AgendaItemChildAccessor(Child.ALWAYS); 
 
         /**
          * Accessors for all linked items
          */
         private static final AgendaItemChildAccessor [] linkedNodes = { whenTrue, whenFalse, always };
         
         /**
          * Accessors for children (so ALWAYS is omitted);
          */
         private static final AgendaItemChildAccessor [] children = { whenTrue, whenFalse };
         
         private final Child whichChild;
         
         private AgendaItemChildAccessor(Child whichChild) {
             if (whichChild == null) throw new IllegalArgumentException("whichChild must be non-null");
             this.whichChild = whichChild;
         }
         
         /**
          * @return the referenced child
          */
         public AgendaItemBo getChild(AgendaItemBo parent) {
             switch (whichChild) {
             case WHEN_TRUE: return parent.getWhenTrue();
             case WHEN_FALSE: return parent.getWhenFalse();
             case ALWAYS: return parent.getAlways();
             default: throw new IllegalStateException();
             }
         }
         
         /**
          * Sets the child reference and the child id 
          */
         public void setChild(AgendaItemBo parent, AgendaItemBo child) {
             switch (whichChild) {
             case WHEN_TRUE: 
                 parent.setWhenTrue(child);
                 parent.setWhenTrueId(child == null ? null : child.getId());
                 break;
             case WHEN_FALSE:
                 parent.setWhenFalse(child);
                 parent.setWhenFalseId(child == null ? null : child.getId());
                 break;
             case ALWAYS:
                 parent.setAlways(child);
                 parent.setAlwaysId(child == null ? null : child.getId());
                 break;
             default: throw new IllegalStateException();
             }
         }
     }
     //
     // Rule Editor Controller methods
     //
     @RequestMapping(params = "methodToCall=" + "copyRule")
     public ModelAndView copyRule(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         String name = agendaEditor.getCopyRuleName();
         String namespace = agendaEditor.getNamespace();
         // fetch existing rule and copy fields to new rule
 
         final String copyRuleNameErrorPropertyName = "AgendaEditorView-AddRule-Page"; //"copyRuleName",
         if (StringUtils.isBlank(name)) {
             GlobalVariables.getMessageMap().putError(copyRuleNameErrorPropertyName, "error.rule.missingCopyRuleName");
             return super.refresh(form, result, request, response);
         }
 
         RuleDefinition oldRuleDefinition = getRuleBoService().getRuleByNameAndNamespace(name, namespace);
 
         if (oldRuleDefinition == null) {
             GlobalVariables.getMessageMap().putError(copyRuleNameErrorPropertyName, "error.rule.invalidCopyRuleName", namespace + ":" + name);
             return super.refresh(form, result, request, response);
         }
 
         RuleBo oldRule = RuleBo.from(oldRuleDefinition);
         RuleBo newRule = RuleBo.copyRule(oldRule);
         agendaEditor.getAgendaItemLine().setRule( newRule );
         // hack to set ui action object to first action in the list
         if (!newRule.getActions().isEmpty()) {
             agendaEditor.setAgendaItemLineRuleAction( newRule.getActions().get(0));
         }
         return super.refresh(form, result, request, response);
     }
 
 
     /**
      * This method starts an edit proposition.
      */
     @RequestMapping(params = "methodToCall=" + "goToEditProposition")
     public ModelAndView goToEditProposition(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         // open the selected node for editing
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
         String selectedPropId = agendaEditor.getSelectedPropositionId();
 
         Node<RuleTreeNode,String> root = rule.getPropositionTree().getRootElement();
         PropositionBo propositionToToggleEdit = null;
         boolean newEditMode = true;
 
         // find parent
         Node<RuleTreeNode,String> parent = findParentPropositionNode( root, selectedPropId);
         if (parent != null){
             List<Node<RuleTreeNode,String>> children = parent.getChildren();
             for( int index=0; index< children.size(); index++){
                 Node<RuleTreeNode,String> child = children.get(index);
                 if (propIdMatches(child, selectedPropId)){
                     PropositionBo prop = child.getData().getProposition();
                     propositionToToggleEdit = prop;
                     newEditMode =  !prop.getEditMode();
                     break;
                 } else {
                     child.getData().getProposition().setEditMode(false);
                 }
             }
         }
 
         resetEditModeOnPropositionTree(root);
         if (propositionToToggleEdit != null) {
             propositionToToggleEdit.setEditMode(newEditMode);
             //refresh the tree
             rule.refreshPropositionTree(null);
         }
 
         return getUIFModelAndView(form);
     }
 
     /**
      * This method returns the last simple node in the topmost branch.
      * @param grandChildren
      * @return
      */
     protected Node<RuleTreeNode,String> getLastSimpleNode(List<Node<RuleTreeNode,String>> grandChildren) {
         int lastIndex = grandChildren.size() - 1;
         Node<RuleTreeNode,String> lastSimpleNode = grandChildren.get(lastIndex);
 
         // search until you find the first simple proposition since some nodes are operators.
         while (!(SimplePropositionNode.NODE_TYPE.equalsIgnoreCase(lastSimpleNode.getNodeType()) 
                 || SimplePropositionEditNode.NODE_TYPE.equalsIgnoreCase(lastSimpleNode.getNodeType())
                 ) && lastIndex >= 0) {
             lastSimpleNode = grandChildren.get(lastIndex);
             lastIndex--;
         }
         
         return lastSimpleNode;
     }
     
     /**
     *
     * This method gets the last propostion in the topmost branch.
     *
     * @param root
     * @return
     */
     protected String getDefaultAddLocationPropositionId(Node<RuleTreeNode, String> root) {
         List<Node<RuleTreeNode,String>> children = root.getChildren();
         String selectedId = "";
         
         // The root usually has only one child. 
         //This child either has multiple grandchildren when there is more than one proposition or 
         //is a simple proposition with no grandchildren.
         if (children.size() != 0) {
             Node<RuleTreeNode,String> child = children.get(0);
             List<Node<RuleTreeNode,String>> grandChildren = child.getChildren();
 
             // if there are grandchildren it means multiple propositions have been added.
             if (grandChildren.size() != 0) {
                 Node<RuleTreeNode,String> lastSimpleNode = getLastSimpleNode(grandChildren);
                 selectedId = lastSimpleNode.getData().getProposition().getId();
             } else {
                 // if there are no grandchildren, it means only a single simpleProposition
                 // has been added.
                 selectedId = child.getData().getProposition().getId();
             }    
         }
         
         return selectedId;
     }
     
     @RequestMapping(params = "methodToCall=" + "addProposition")
     public ModelAndView addProposition(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response) throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
         String selectedPropId = agendaEditor.getSelectedPropositionId();
 
         // find parent
         Node<RuleTreeNode,String> root = agendaEditor.getAgendaItemLine().getRule().getPropositionTree().getRootElement();
         
         // if a proposition is not selected, get the last one in the topmost
         // branch
         if (StringUtils.isEmpty(selectedPropId)) {
             selectedPropId = getDefaultAddLocationPropositionId(root);
         }
         
         // parent is the proposition user selected
         Node<RuleTreeNode,String> parent = findParentPropositionNode( root, selectedPropId);
         
         resetEditModeOnPropositionTree(root);
           
         // add new child at appropriate spot
         if (parent != null){
             List<Node<RuleTreeNode,String>> children = parent.getChildren();
             for( int index=0; index< children.size(); index++){
                 Node<RuleTreeNode,String> child = children.get(index);
                
                 // if our selected node is a simple proposition, add a new one after
                 if (propIdMatches(child, selectedPropId)){
                     // handle special case of adding to a lone simple proposition.
                     // in this case, we need to change the root level proposition to a compound proposition
                     // move the existing simple proposition as the first compound component,
                     // then add a new blank simple prop as the second compound component.
                     if (parent == root &&
                         (SimplePropositionNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType()) ||
                         SimplePropositionEditNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType()))){
 
                         // create a new compound proposition
                         PropositionBo compound = PropositionBo.createCompoundPropositionBoStub(child.getData().getProposition(), true);
                         compound.setDescription("New Compound Proposition");
                         // don't set compound.setEditMode(true) as the Simple Prop in the compound prop is the only prop in edit mode
                         rule.setProposition(compound);
                         rule.refreshPropositionTree(null);
                     }
                     // handle regular case of adding a simple prop to an existing compound prop
                     else if(SimplePropositionNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType()) ||
                        SimplePropositionEditNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType())){
 
                         // build new Blank Proposition
                         PropositionBo blank = PropositionBo.createSimplePropositionBoStub(child.getData().getProposition(),PropositionType.SIMPLE.getCode());
                         //add it to the parent
                         PropositionBo parentProp = parent.getData().getProposition();
                         parentProp.getCompoundComponents().add(((index/2)+1), blank);
 
                         rule.refreshPropositionTree(true);
                     }
 
                     break;
                 }
             }
         } else {
             // special case, if root has no children, add a new simple proposition
             // todo: how to add compound proposition. - just add another to the firs simple
             if (root.getChildren().isEmpty()){
                 PropositionBo blank = PropositionBo.createSimplePropositionBoStub(null,PropositionType.SIMPLE.getCode());
                 blank.setRuleId(rule.getId());
                 rule.setPropId(blank.getId());
                 rule.setProposition(blank);
                 rule.refreshPropositionTree(true);
             }
         }
         return getUIFModelAndView(form);
     }
 
     /**
      *
      * This method adds an opCode Node to separate components in a compound proposition.
      *
      * @param currentNode
      * @param prop
      * @return
      */
     private void addOpCodeNode(Node currentNode, PropositionBo prop, int index){
         String opCodeLabel = "";
 
         if (LogicalOperator.AND.getCode().equalsIgnoreCase(prop.getCompoundOpCode())){
             opCodeLabel = "AND";
         } else if (LogicalOperator.OR.getCode().equalsIgnoreCase(prop.getCompoundOpCode())){
             opCodeLabel = "OR";
         }
         Node<RuleTreeNode, String> aNode = new Node<RuleTreeNode, String>();
         aNode.setNodeLabel("");
         aNode.setNodeType("ruleTreeNode compoundOpCodeNode");
         aNode.setData(new CompoundOpCodeNode(prop));
         currentNode.insertChildAt(index, aNode);
     }
 
 
     private boolean propIdMatches(Node<RuleTreeNode, String> node, String propId){
         if (propId!=null && node != null && node.getData() != null && propId.equalsIgnoreCase(node.getData().getProposition().getId())) {
             return true;
         }
         return false;
     }
 
     /**
      * disable edit mode for all Nodes beneath and including the passed in Node
      * @param currentNode
      */
     private void resetEditModeOnPropositionTree(Node<RuleTreeNode, String> currentNode){
         if (currentNode.getData() != null){
             RuleTreeNode dataNode = currentNode.getData();
             dataNode.getProposition().setEditMode(false);
         }
         List<Node<RuleTreeNode,String>> children = currentNode.getChildren();
         for( Node<RuleTreeNode,String> child : children){
               resetEditModeOnPropositionTree(child);
         }
     }
 
     private Node<RuleTreeNode, String> findPropositionTreeNode(Node<RuleTreeNode, String> currentNode, String selectedPropId){
         Node<RuleTreeNode,String> bingo = null;
         if (currentNode.getData() != null){
             RuleTreeNode dataNode = currentNode.getData();
             if (selectedPropId.equalsIgnoreCase(dataNode.getProposition().getId())){
                 return currentNode;
             }
         }
         List<Node<RuleTreeNode,String>> children = currentNode.getChildren();
         for( Node<RuleTreeNode,String> child : children){
               bingo = findPropositionTreeNode(child, selectedPropId);
               if (bingo != null) break;
         }
         return bingo;
     }
 
     private Node<RuleTreeNode, String> findParentPropositionNode(Node<RuleTreeNode, String> currentNode, String selectedPropId){
         Node<RuleTreeNode,String> bingo = null;
         if (selectedPropId != null) {
             // if it's in children, we have the parent
             List<Node<RuleTreeNode,String>> children = currentNode.getChildren();
             for( Node<RuleTreeNode,String> child : children){
                 RuleTreeNode dataNode = child.getData();
                 if (selectedPropId.equalsIgnoreCase(dataNode.getProposition().getId()))
                     return currentNode;
             }
 
             // if not found check grandchildren
             for( Node<RuleTreeNode,String> kid : children){
                   bingo = findParentPropositionNode(kid, selectedPropId);
                   if (bingo != null) break;
             }
         }
         return bingo;
     }
 
     /**
      * This method return the index of the position of the child that matches the id
      * @param parent
      * @param propId
      * @return index if found, -1 if not found
      */
     private int findChildIndex(Node<RuleTreeNode,String> parent, String propId){
         int index;
         List<Node<RuleTreeNode,String>> children = parent.getChildren();
         for(index=0; index< children.size(); index++){
             Node<RuleTreeNode,String> child = children.get(index);
             // if our selected node is a simple proposition, add a new one after
             if (propIdMatches(child, propId)){
                 return index;
             }
         }
         return -1;
     }
 
     @RequestMapping(params = "methodToCall=" + "movePropositionUp")
     public ModelAndView movePropositionUp(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         moveSelectedProposition(form, true);
 
         return getUIFModelAndView(form);
     }
 
     @RequestMapping(params = "methodToCall=" + "movePropositionDown")
     public ModelAndView movePropositionDown(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         moveSelectedProposition(form, false);
 
         return getUIFModelAndView(form);
     }
 
     private void moveSelectedProposition(UifFormBase form, boolean up) {
 
         /* Rough algorithm for moving a node up.
          *
          * find the following:
          *   node := the selected node
          *   parent := the selected node's parent, its containing node (via when true or when false relationship)
          *   parentsOlderCousin := the parent's level-order predecessor (sibling or cousin)
          *
          */
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
         String selectedPropId = agendaEditor.getSelectedPropositionId();
 
         // find parent
         Node<RuleTreeNode,String> parent = findParentPropositionNode(rule.getPropositionTree().getRootElement(), selectedPropId);
 
         // add new child at appropriate spot
         if (parent != null){
             List<Node<RuleTreeNode,String>> children = parent.getChildren();
             for( int index=0; index< children.size(); index++){
                 Node<RuleTreeNode,String> child = children.get(index);
                 // if our selected node is a simple proposition, add a new one after
                 if (propIdMatches(child, selectedPropId)){
                     if(SimplePropositionNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType()) ||
                        SimplePropositionEditNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType()) ||
                        RuleTreeNode.COMPOUND_NODE_TYPE.equalsIgnoreCase(child.getNodeType()) ){
 
                         if (((index > 0) && up) || ((index <(children.size() - 1)&& !up))){
                             //remove it from its current spot
                             PropositionBo parentProp = parent.getData().getProposition();
                             PropositionBo workingProp = parentProp.getCompoundComponents().remove(index/2);
                             if (up){
                                 parentProp.getCompoundComponents().add((index/2)-1, workingProp);
                             }else{
                                 parentProp.getCompoundComponents().add((index/2)+1, workingProp);
                             }
 
                             // insert it in the new spot
                             // redisplay the tree (editMode = true)
                             boolean editMode = (SimplePropositionEditNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType()));
                             rule.refreshPropositionTree(editMode);
                         }
                     }
 
                     break;
                 }
             }
         }
     }
     @RequestMapping(params = "methodToCall=" + "movePropositionLeft")
     public ModelAndView movePropositionLeft(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         /* Rough algorithm for moving a node up.
          *
          * find the following:
          *   node := the selected node
          *   parent := the selected node's parent, its containing node (via when true or when false relationship)
          *   parentsOlderCousin := the parent's level-order predecessor (sibling or cousin)
          *
          */
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
         String selectedPropId = agendaEditor.getSelectedPropositionId();
 
         // find agendaEditor.getAgendaItemLine().getRule().getPropositionTree().getRootElement()parent
         Node<RuleTreeNode,String> root = rule.getPropositionTree().getRootElement();
         Node<RuleTreeNode,String> parent = findParentPropositionNode(root, selectedPropId);
         if ((parent != null) && (RuleTreeNode.COMPOUND_NODE_TYPE.equalsIgnoreCase(parent.getNodeType()))){
             Node<RuleTreeNode,String> granny = findParentPropositionNode(root,parent.getData().getProposition().getId());
             if (granny != root){
                 int oldIndex = findChildIndex(parent, selectedPropId);
                 int newIndex = findChildIndex(granny, parent.getData().getProposition().getId());
                 if (oldIndex >= 0 && newIndex >= 0){
                     PropositionBo prop = parent.getData().getProposition().getCompoundComponents().remove(oldIndex/2);
                     granny.getData().getProposition().getCompoundComponents().add((newIndex/2)+1, prop);
                     rule.refreshPropositionTree(false);
                 }
             } else {
                 // TODO: do we allow moving up to the root?
                 // we could add a new top level compound node, with current root as 1st child,
                 // and move the node to the second child.
             }
         }
         return getUIFModelAndView(form);
     }
 
     @RequestMapping(params = "methodToCall=" + "movePropositionRight")
     public ModelAndView movePropositionRight(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         /* Rough algorithm for moving a node Right
          * if the selected node is above a compound proposition, move it into the compound proposition as the first child
          * if the node is above a simple proposition, do nothing.
          * find the following:
          *   node := the selected node
          *   parent := the selected node's parent, its containing node
          *   nextSibling := the node after the selected node
          *
          */
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
         String selectedPropId = agendaEditor.getSelectedPropositionId();
 
         // find parent
         Node<RuleTreeNode,String> parent = findParentPropositionNode(
                 rule.getPropositionTree().getRootElement(), selectedPropId);
         if (parent != null){
             int index = findChildIndex(parent, selectedPropId);
             // if we are the last child, do nothing, otherwise
             if (index >= 0 && index+1 < parent.getChildren().size()){
                 Node<RuleTreeNode,String> child = parent.getChildren().get(index);
                 Node<RuleTreeNode,String> nextSibling = parent.getChildren().get(index+2);
                 // if selected node above a compound node, move it into it as first child
                 if(RuleTreeNode.COMPOUND_NODE_TYPE.equalsIgnoreCase(nextSibling.getNodeType()) ){
                     // remove selected node from it's current spot
                     PropositionBo prop = parent.getData().getProposition().getCompoundComponents().remove(index/2);
                     // add it to it's siblings children
                     nextSibling.getData().getProposition().getCompoundComponents().add(0, prop);
                     rule.refreshPropositionTree(false);
                 }
             }
         }
         return getUIFModelAndView(form);
     }
 
     /**
      * introduces a new compound proposition between the selected proposition and its parent.
      * Additionally, it puts a new blank simple proposition underneath the compound proposition
      * as a sibling to the selected proposition.
      */
     @RequestMapping(params = "methodToCall=" + "togglePropositionSimpleCompound")
     public ModelAndView togglePropositionSimpleCompound(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
         String selectedPropId = agendaEditor.getSelectedPropositionId();
 
         resetEditModeOnPropositionTree(rule.getPropositionTree().getRootElement());
 
         if (!StringUtils.isBlank(selectedPropId)) {
             // find parent
             Node<RuleTreeNode,String> parent = findParentPropositionNode(
                     rule.getPropositionTree().getRootElement(), selectedPropId);
             if (parent != null){
 
                 int index = findChildIndex(parent, selectedPropId);
 
                 PropositionBo propBo = parent.getChildren().get(index).getData().getProposition();
 
                 // create a new compound proposition
                 PropositionBo compound = PropositionBo.createCompoundPropositionBoStub(propBo, true);
                 compound.setDescription("New Compound Proposition");
                 compound.setEditMode(false);
 
                 if (parent.getData() == null) { // SPECIAL CASE: this is the only proposition in the tree
                     rule.setProposition(compound);
                 } else {
                     PropositionBo parentBo = parent.getData().getProposition();
                     List<PropositionBo> siblings = parentBo.getCompoundComponents();
 
                     int propIndex = -1;
                     for (int i=0; i<siblings.size(); i++) {
                         if (propBo.getId().equals(siblings.get(i).getId())) {
                             propIndex = i;
                             break;
                         }
                     }
 
                     parentBo.getCompoundComponents().set(propIndex, compound);
                 }
             }
         }
 
         agendaEditor.getAgendaItemLine().getRule().refreshPropositionTree(true);
         return getUIFModelAndView(form);
     }
 
 
     @RequestMapping(params = "methodToCall=" + "cutProposition")
     public ModelAndView cutProposition(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         String selectedPropId = agendaEditor.getSelectedPropositionId();
         agendaEditor.setCutPropositionId(selectedPropId);
 
         return getUIFModelAndView(form);
     }
 
     @RequestMapping(params = "methodToCall=" + "pasteProposition")
     public ModelAndView pasteProposition(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
 
         // get selected id
         String cutPropId = agendaEditor.getCutPropositionId();
         String selectedPropId = agendaEditor.getSelectedPropositionId();
 
         if (StringUtils.isNotBlank(selectedPropId) && selectedPropId.equals(cutPropId)) {
                 // do nothing; can't paste to itself
         } else {
 
             // proposition tree root
             Node<RuleTreeNode, String> root = rule.getPropositionTree().getRootElement();
 
             if (StringUtils.isNotBlank(selectedPropId) && StringUtils.isNotBlank(cutPropId)) {
                 Node<RuleTreeNode,String> parentNode = findParentPropositionNode(root, selectedPropId);
                 PropositionBo newParent;
                 if (parentNode == root){
                     // special case
                     // build new top level compound proposition,
                     // add existing as first child
                     // then paste cut node as 2nd child
                     newParent = PropositionBo.createCompoundPropositionBoStub2(
                             root.getChildren().get(0).getData().getProposition());
                     newParent.setEditMode(true);
                     rule.setProposition(newParent);
                 } else {
                     newParent = parentNode.getData().getProposition();
                 }
                 PropositionBo oldParent = findParentPropositionNode(root, cutPropId).getData().getProposition();
 
                 PropositionBo workingProp = null;
                 // cut from old
                 if (oldParent != null){
                     List <PropositionBo> children = oldParent.getCompoundComponents();
                     for( int index=0; index< children.size(); index++){
                         if (cutPropId.equalsIgnoreCase(children.get(index).getId())){
                             workingProp = oldParent.getCompoundComponents().remove(index);
                             break;
                         }
                     }
                 }
 
                 // add to new
                 if (newParent != null && workingProp != null){
                     List <PropositionBo> children = newParent.getCompoundComponents();
                     for( int index=0; index< children.size(); index++){
                         if (selectedPropId.equalsIgnoreCase(children.get(index).getId())){
                             children.add(index+1, workingProp);
                             break;
                         }
                     }
                 }
                 // TODO: determine edit mode.
 //                boolean editMode = (SimplePropositionEditNode.NODE_TYPE.equalsIgnoreCase(child.getNodeType()));
                 rule.refreshPropositionTree(false);
             }
         }
         agendaEditor.setCutPropositionId(null);
         // call the super method to avoid the agenda tree being reloaded from the db
         return getUIFModelAndView(form);
     }
 
     @RequestMapping(params = "methodToCall=" + "deleteProposition")
     public ModelAndView deleteProposition(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
         AgendaEditor agendaEditor = getAgendaEditor(form);
         String selectedPropId = agendaEditor.getSelectedPropositionId();
         Node<RuleTreeNode, String> root = agendaEditor.getAgendaItemLine().getRule().getPropositionTree().getRootElement();
 
         Node<RuleTreeNode, String> parentNode = findParentPropositionNode(root, selectedPropId);
 
         // what if it is the root?
         if (parentNode != null && parentNode.getData() != null) { // it is not the root as there is a parent w/ a prop
             PropositionBo parent = parentNode.getData().getProposition();
             if (parent != null){
                 List <PropositionBo> children = parent.getCompoundComponents();
                 for( int index=0; index< children.size(); index++){
                     if (selectedPropId.equalsIgnoreCase(children.get(index).getId())){
                         parent.getCompoundComponents().remove(index);
                         break;
                     }
                 }
             }
         } else { // no parent, it is the root
             if (ObjectUtils.isNotNull(parentNode)) {
                 parentNode.getChildren().clear();
                 agendaEditor.getAgendaItemLine().getRule().getPropositionTree().setRootElement(null);
                 agendaEditor.getAgendaItemLine().getRule().setPropId(null);
                 agendaEditor.getAgendaItemLine().getRule().setProposition(null);
             } else {
                 GlobalVariables.getMessageMap().putError(KRMSPropertyConstants.Rule.PROPOSITION_TREE_GROUP_ID,
                         "error.rule.proposition.noneHighlighted");
             }
         }
 
         agendaEditor.getAgendaItemLine().getRule().refreshPropositionTree(false);
         return getUIFModelAndView(form);
     }
 
     @RequestMapping(params = "methodToCall=" + "updateCompoundOperator")
     public ModelAndView updateCompoundOperator(@ModelAttribute("KualiForm") UifFormBase form, BindingResult result,
             HttpServletRequest request, HttpServletResponse response)
             throws Exception {
 
         AgendaEditor agendaEditor = getAgendaEditor(form);
         RuleBo rule = agendaEditor.getAgendaItemLine().getRule();
         rule.refreshPropositionTree(false);
 
         return getUIFModelAndView(form);
     }
 
 }