/**
    * Copyright 2005-2013 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.krad.uif.container;
  
  import org.apache.commons.collections.ListUtils;
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.mo.common.active.Inactivatable;
  import org.kuali.rice.kim.api.identity.Person;
  import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
  import org.kuali.rice.krad.uif.UifConstants;
  import org.kuali.rice.krad.uif.UifParameters;
  import org.kuali.rice.krad.uif.UifPropertyPaths;
  import org.kuali.rice.krad.uif.component.Component;
  import org.kuali.rice.krad.uif.component.ComponentSecurity;
  import org.kuali.rice.krad.uif.control.Control;
  import org.kuali.rice.krad.uif.component.DataBinding;
  import org.kuali.rice.krad.uif.field.ActionField;
  import org.kuali.rice.krad.uif.field.InputField;
  import org.kuali.rice.krad.uif.field.Field;
  import org.kuali.rice.krad.uif.field.FieldGroup;
  import org.kuali.rice.krad.uif.field.RemoteFieldsHolder;
  import org.kuali.rice.krad.uif.layout.CollectionLayoutManager;
  import org.kuali.rice.krad.uif.service.ExpressionEvaluatorService;
  import org.kuali.rice.krad.uif.util.ComponentUtils;
  import org.kuali.rice.krad.uif.util.ExpressionUtils;
  import org.kuali.rice.krad.uif.util.ObjectPropertyUtils;
  import org.kuali.rice.krad.uif.view.View;
  import org.kuali.rice.krad.uif.view.ViewAuthorizer;
  import org.kuali.rice.krad.uif.view.ViewModel;
  import org.kuali.rice.krad.uif.view.ViewPresentationController;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.KRADUtils;
  import org.kuali.rice.krad.util.ObjectUtils;
  import org.kuali.rice.krad.web.form.UifFormBase;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Builds out the <code>Field</code> instances for a collection group with a
   * series of steps that interact with the configured
   * <code>CollectionLayoutManager</code> to assemble the fields as necessary for
   * the layout
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class CollectionGroupBuilder implements Serializable {
  	private static final long serialVersionUID = -4762031957079895244L;
  
  	/**
  	 * Creates the <code>Field</code> instances that make up the table
  	 * 
  	 * <p>
  	 * The corresponding collection is retrieved from the model and iterated
  	 * over to create the necessary fields. The binding path for fields that
  	 * implement <code>DataBinding</code> is adjusted to point to the collection
  	 * line it is apart of. For example, field 'number' of collection 'accounts'
  	 * for line 1 will be set to 'accounts[0].number', and for line 2
  	 * 'accounts[1].number'. Finally parameters are set on the line's action
  	 * fields to indicate what collection and line they apply to.
  	 * </p>
  	 * 
  	 * @param view
  	 *            - View instance the collection belongs to
  	 * @param model
  	 *            - Top level object containing the data
  	 * @param collectionGroup
  	 *            - CollectionGroup component for the collection
  	 */
      public void build(View view, Object model, CollectionGroup collectionGroup) {
          // create add line
          if (collectionGroup.isRenderAddLine() && !collectionGroup.isReadOnly()) {
              buildAddLine(view, model, collectionGroup);
          }
  
          // get the collection for this group from the model
          List<Object> modelCollection = ObjectPropertyUtils.getPropertyValue(model, ((DataBinding) collectionGroup)
                  .getBindingInfo().getBindingPath());
  
          if (modelCollection != null) {
              // filter inactive model
              List<Integer> showIndexes = performCollectionFiltering(view, model, collectionGroup, modelCollection);
 
             // for each collection row build the line fields
             for (int index = 0; index < modelCollection.size(); index++) {
                 // display only records that passed filtering
                 if (showIndexes.contains(index)) {
                     String bindingPathPrefix = collectionGroup.getBindingInfo().getBindingName() + "[" + index + "]";
                     if (StringUtils.isNotBlank(collectionGroup.getBindingInfo().getBindByNamePrefix())) {
                         bindingPathPrefix =
                                 collectionGroup.getBindingInfo().getBindByNamePrefix() + "." + bindingPathPrefix;
                     }
 
                     Object currentLine = modelCollection.get(index);
 
                     List<ActionField> actions = getLineActions(view, model, collectionGroup, currentLine, index);
                     buildLine(view, model, collectionGroup, bindingPathPrefix, actions, false, currentLine, index);
                 }
             }
         }
     }
 
     /**
      * Performs any filtering necessary on the collection before building the collection fields
      *
      * <p>
      * If showInactive is set to false and the collection line type implements <code>Inactivatable</code>,
      * invokes the active collection filter. Then any {@link CollectionFilter} instances configured for the collection
      * group are invoked to filter the collection. Collections lines must pass all filters in order to be
      * displayed
      * </p>
      *
      * @param view - view instance that contains the collection
      * @param model - object containing the views data
      * @param collectionGroup - collection group component instance that will display the collection
      * @param collection - collection instance that will be filtered
      */
     protected List<Integer> performCollectionFiltering(View view, Object model, CollectionGroup collectionGroup,
             Collection<?> collection) {
         List<Integer> filteredIndexes = new ArrayList<Integer>();
         for (int i = 0; i < collection.size(); i++) {
             filteredIndexes.add(new Integer(i));
         }
 
         if (Inactivatable.class.isAssignableFrom(collectionGroup.getCollectionObjectClass()) && !collectionGroup
                 .isShowInactive()) {
             List<Integer> activeIndexes = collectionGroup.getActiveCollectionFilter().filter(view, model,
                     collectionGroup);
             filteredIndexes = ListUtils.intersection(filteredIndexes, activeIndexes);
         }
 
         for (CollectionFilter collectionFilter : collectionGroup.getFilters()) {
             List<Integer> indexes = collectionFilter.filter(view, model, collectionGroup);
             filteredIndexes = ListUtils.intersection(filteredIndexes, indexes);
             if (filteredIndexes.isEmpty()) {
                 break;
             }
         }
 
         return filteredIndexes;
     }
 
 	/**
 	 * Builds the fields for holding the collection add line and if necessary
 	 * makes call to setup the new line instance
 	 * 
 	 * @param view
 	 *            - view instance the collection belongs to
 	 * @param collectionGroup
 	 *            - collection group the layout manager applies to
 	 * @param model
 	 *            - Object containing the view data, should extend UifFormBase
 	 *            if using framework managed new lines
 	 */
     protected void buildAddLine(View view, Object model, CollectionGroup collectionGroup) {
         boolean addLineBindsToForm = false;
 
         // initialize new line if one does not already exist
         initializeNewCollectionLine(view, model, collectionGroup, false);
 
         // determine whether the add line binds to the generic form map or a
         // specified property
         if (StringUtils.isBlank(collectionGroup.getAddLinePropertyName())) {
             addLineBindsToForm = true;
         }
 
         String addLineBindingPath = collectionGroup.getAddLineBindingInfo().getBindingPath();
         List<ActionField> actions = getAddLineActions(view, model, collectionGroup);
 
         Object addLine = ObjectPropertyUtils.getPropertyValue(model, addLineBindingPath);
         buildLine(view, model, collectionGroup, addLineBindingPath, actions, addLineBindsToForm, addLine, -1);
     }
 
 	/**
 	 * Builds the field instances for the collection line. A copy of the
 	 * configured items on the <code>CollectionGroup</code> is made and adjusted
 	 * for the line (id and binding). Then a call is made to the
 	 * <code>CollectionLayoutManager</code> to assemble the line as necessary
 	 * for the layout
 	 * 
 	 * @param view
 	 *            - view instance the collection belongs to
 	 * @param model
 	 *            - top level object containing the data
 	 * @param collectionGroup
 	 *            - collection group component for the collection
 	 * @param bindingPath
 	 *            - binding path for the line fields (if DataBinding)
 	 * @param actions
 	 *            - List of actions to set in the lines action column
 	 * @param bindToForm
 	 *            - whether the bindToForm property on the items bindingInfo
 	 *            should be set to true (needed for add line)
 	 * @param currentLine
 	 *            - object instance for the current line, or null if add line
 	 * @param lineIndex
 	 *            - index of the line in the collection, or -1 if we are
 	 *            building the add line
 	 */
 	@SuppressWarnings("unchecked")
 	protected void buildLine(View view, Object model, CollectionGroup collectionGroup, String bindingPath,
 			List<ActionField> actions, boolean bindToForm, Object currentLine, int lineIndex) {
 		CollectionLayoutManager layoutManager = (CollectionLayoutManager) collectionGroup.getLayoutManager();
 
 		// copy group items for new line
         List<? extends Component> lineItems = null;
         String lineSuffix = null;
         if (lineIndex == -1) {
             lineItems = ComponentUtils.copyComponentList(collectionGroup.getAddLineFields(), null);
             lineSuffix = UifConstants.IdSuffixes.ADD_LINE;
         } else {
             lineItems = ComponentUtils.copyComponentList(collectionGroup.getItems(), null);
             lineSuffix = UifConstants.IdSuffixes.LINE + Integer.toString(lineIndex);
         }
 
         if (StringUtils.isNotBlank(collectionGroup.getSubCollectionSuffix())) {
             lineSuffix = collectionGroup.getSubCollectionSuffix() + lineSuffix;
         }
 
         // check for remote fields holder
         List<Field> lineFields = processAnyRemoteFieldsHolder(view, model, collectionGroup, lineItems);
 
         // copy fields for line and adjust binding to match collection line path
         lineFields = (List<Field>) ComponentUtils.copyFieldList(lineFields, bindingPath, lineSuffix);
 
         boolean readOnlyLine = collectionGroup.isReadOnly();
 
         // add special css styles to identify the add line client side
         if (lineIndex == -1) {
             for (Field f : lineFields) {
                 if (f instanceof InputField) {
                     // sets up - skipping these fields in add area during standard form validation calls
                     // custom addLineToCollection js call will validate these fields manually on an add
                     Control control = ((InputField) f).getControl();
                     if (control != null) {
                         control.addStyleClass(collectionGroup.getFactoryId() + "-addField");
                         control.addStyleClass("ignoreValid");
                     }
                 }
             }
 
             // set focus on after the add line submit to first field of add line
             for (ActionField action : actions) {
                 if (action.getActionParameter(UifParameters.ACTION_TYPE).equals(UifParameters.ADD_LINE)) {
                     action.setFocusOnAfterSubmit(lineFields.get(0).getId());
                 }
             }
         } else {
             // for existing lines, check view line auth
             boolean canViewLine = checkViewLineAuthorizationAndPresentationLogic(view, (ViewModel) model,
                     collectionGroup, currentLine);
 
             // if line is not viewable, just return without calling the layout manager to add the line
             if (!canViewLine) {
                 return;
             }
 
             // check edit line authorization if collection is not read only
             if (!collectionGroup.isReadOnly()) {
                 readOnlyLine = !checkEditLineAuthorizationAndPresentationLogic(view, (ViewModel) model, collectionGroup,
                         currentLine);
             }
 
             ComponentUtils.pushObjectToContext(lineFields, UifConstants.ContextVariableNames.READONLY_LINE,
                     readOnlyLine);
             ComponentUtils.pushObjectToContext(actions, UifConstants.ContextVariableNames.READONLY_LINE, readOnlyLine);
         }
 
         ComponentUtils.updateContextsForLine(lineFields, currentLine, lineIndex);
 
         // check authorization for line fields
         applyLineFieldAuthorizationAndPresentationLogic(view, (ViewModel) model, collectionGroup, currentLine,
                 readOnlyLine, lineFields, actions);
 
 		if (bindToForm) {
 			ComponentUtils.setComponentsPropertyDeep(lineFields, UifPropertyPaths.BIND_TO_FORM, new Boolean(true));
 		}		
 		
         // remove fields from the line that have render false
         lineFields = removeNonRenderLineFields(view, model, collectionGroup, lineFields, currentLine, lineIndex);
 
 		// if not add line build sub-collection field groups
 		List<FieldGroup> subCollectionFields = new ArrayList<FieldGroup>();
         if ((lineIndex != -1) && (collectionGroup.getSubCollections() != null)) {
             for (int subLineIndex = 0; subLineIndex < collectionGroup.getSubCollections().size(); subLineIndex++) {
                 CollectionGroup subCollectionPrototype = collectionGroup.getSubCollections().get(subLineIndex);
                 CollectionGroup subCollectionGroup = ComponentUtils.copy(subCollectionPrototype, lineSuffix);
 
                 // verify the sub-collection should be rendered
                 boolean renderSubCollection = checkSubCollectionRender(view, model, collectionGroup,
                         subCollectionGroup);
                 if (!renderSubCollection) {
                     continue;
                 }
 
                 subCollectionGroup.getBindingInfo().setBindByNamePrefix(bindingPath);
                 if (subCollectionGroup.isRenderAddLine()) {
                     subCollectionGroup.getAddLineBindingInfo().setBindByNamePrefix(bindingPath);
                 }
 
                 // set sub-collection suffix on group so it can be used for generated groups
                 String subCollectionSuffix = lineSuffix;
                 if (StringUtils.isNotBlank(subCollectionGroup.getSubCollectionSuffix())) {
                     subCollectionSuffix = subCollectionGroup.getSubCollectionSuffix() + lineSuffix;
                 }
                 subCollectionGroup.setSubCollectionSuffix(subCollectionSuffix);
 
                 FieldGroup fieldGroupPrototype = layoutManager.getSubCollectionFieldGroupPrototype();
 
                 FieldGroup subCollectionFieldGroup = ComponentUtils.copy(fieldGroupPrototype,
                         lineSuffix + UifConstants.IdSuffixes.SUB + subLineIndex);
                 subCollectionFieldGroup.setGroup(subCollectionGroup);
                 //subCollectionFieldGroup.setLabel(subCollectionGroup.getTitle());
                 //subCollectionFieldGroup.getLabelField().setRender(true);
 
                 ComponentUtils.updateContextForLine(subCollectionFieldGroup, currentLine, lineIndex);
 
                 subCollectionFields.add(subCollectionFieldGroup);
             }
         }
 
 		// invoke layout manager to build the complete line
 		layoutManager.buildLine(view, model, collectionGroup, lineFields, subCollectionFields, bindingPath, actions,
 				lineSuffix, currentLine, lineIndex);
 	}
 
     /**
      * Iterates through the given items checking for <code>RemotableFieldsHolder</code>, if found
      * the holder is invoked to retrieved the remotable fields and translate to attribute fields. The translated list
      * is then inserted into the returned list at the position of the holder
      *
      * @param view - view instance containing the container
      * @param model - object instance containing the view data
      * @param group - collection group instance to check for any remotable fields holder
      * @param items - list of items to process
      */
     protected List<Field> processAnyRemoteFieldsHolder(View view, Object model, CollectionGroup group,
             List<? extends Component> items) {
         List<Field> processedItems = new ArrayList<Field>();
 
         // check for holders and invoke to retrieve the remotable fields and translate
         // translated fields are placed into the processed items list at the position of the holder
         for (Component item : items) {
             if (item instanceof RemoteFieldsHolder) {
                 List<InputField> translatedFields = ((RemoteFieldsHolder) item).fetchAndTranslateRemoteFields(view,
                         model, group);
                 processedItems.addAll(translatedFields);
             } else {
                 processedItems.add((Field) item);
             }
         }
 
         return processedItems;
     }
 
     /**
      * Evaluates the render property for the given list of <code>Field</code>
      * instances for the line and removes any fields from the returned list that
      * have render false. The conditional render string is also taken into
      * account. This needs to be done here as opposed to during the normal
      * condition evaluation so the the fields are not used while building the
      * collection lines
      * 
      * @param view
      *            - view instance the collection group belongs to
      * @param model
      *            - object containing the view data
      * @param collectionGroup
      *            - collection group for the line fields
      * @param lineFields
      *            - list of fields configured for the line
      * @param currentLine
      *            - object containing the line data
      * @param lineIndex
      *            - index of the line in the collection
      * @return List<Field> list of field instances that should be rendered
      */
     protected List<Field> removeNonRenderLineFields(View view, Object model, CollectionGroup collectionGroup,
             List<Field> lineFields, Object currentLine, int lineIndex) {
         List<Field> fields = new ArrayList<Field>();
 
         for (Field lineField : lineFields) {
             String conditionalRender = lineField.getPropertyExpression("render");
 
             // evaluate conditional render string if set
             if (StringUtils.isNotBlank(conditionalRender)) {
                 Map<String, Object> context = getContextForField(view, collectionGroup, lineField);
 
                 // Adjust the condition as ExpressionUtils.adjustPropertyExpressions will only be
                 // executed after the collection is built.
                 conditionalRender = ExpressionUtils.replaceBindingPrefixes(view, lineField, conditionalRender);
 
                 Boolean render = (Boolean) getExpressionEvaluatorService().evaluateExpression(model, context,
                         conditionalRender);
                 lineField.setRender(render);
             }
 
             // only add line field if set to render or if it is hidden by progressive render
             if (lineField.isRender() || StringUtils.isNotBlank(lineField.getProgressiveRender())) {
                 fields.add(lineField);
             }
         }
 
         return fields;
     }
 
     /**
      * Invokes the view's configured authorizer and presentation controller to determine if the user has permission
      * to view the line (if a permission has been established)
      *
      * @param view - view instance the collection belongs to and from which the authorizer/presentation controller will
      * be pulled
      * @param model - object containing the view's data
      * @param collectionGroup - collection group containing the line
      * @param line - object containing the lines data
      * @return boolean true if the user can view the line, false if not
      */
     protected boolean checkViewLineAuthorizationAndPresentationLogic(View view, ViewModel model,
             CollectionGroup collectionGroup, Object line) {
         ViewPresentationController presentationController = view.getPresentationController();
         ViewAuthorizer authorizer = view.getAuthorizer();
 
         Person user = GlobalVariables.getUserSession().getPerson();
 
         // check view line auth
         boolean canViewLine = authorizer.canViewLine(view, model, collectionGroup, collectionGroup.getPropertyName(),
                 line, user);
         if (canViewLine) {
             canViewLine = presentationController.canViewLine(view, model, collectionGroup,
                     collectionGroup.getPropertyName(), line);
         }
 
         return canViewLine;
     }
 
     /**
      * Invokes the view's configured authorizer and presentation controller to determine if the user has permission
      * to edit the line (if a permission has been established)
      *
      * @param view - view instance the collection belongs to and from which the authorizer/presentation controller will
      * be pulled
      * @param model - object containing the view's data
      * @param collectionGroup - collection group containing the line
      * @param line - object containing the lines data
      * @return boolean true if the user can edit the line, false if not
      */
     protected boolean checkEditLineAuthorizationAndPresentationLogic(View view, ViewModel model,
             CollectionGroup collectionGroup, Object line) {
         ViewPresentationController presentationController = view.getPresentationController();
         ViewAuthorizer authorizer = view.getAuthorizer();
 
         Person user = GlobalVariables.getUserSession().getPerson();
 
         // check edit line auth
         boolean canEditLine = authorizer.canEditLine(view, model, collectionGroup, collectionGroup.getPropertyName(),
                 line, user);
         if (canEditLine) {
             canEditLine = presentationController.canEditLine(view, model, collectionGroup,
                     collectionGroup.getPropertyName(), line);
         }
 
         return canEditLine;
     }
 
     /**
      * Iterates through the line fields and checks the view field authorization using the view's configured authorizer
      * and presentation controller. If the field is viewable, then sets the edit field authorization. Finally iterates
      * through the line actions invoking the authorizer and presentation controller to authorizer the action
      *
      * @param view - view instance the collection belongs to and from which the authorizer/presentation controller will
      * be pulled
      * @param model - object containing the view's data
      * @param collectionGroup - collection group containing the line
      * @param line - object containing the lines data
      * @param readOnlyLine - flag indicating whether the line has been marked as read only (which will force the fields
      * to be read only)
      * @param lineFields - list of fields instances for the line
      * @param actions - list of action field instances for the line
      */
     protected void applyLineFieldAuthorizationAndPresentationLogic(View view, ViewModel model,
             CollectionGroup collectionGroup, Object line, boolean readOnlyLine, List<Field> lineFields,
             List<ActionField> actions) {
         ViewPresentationController presentationController = view.getPresentationController();
         ViewAuthorizer authorizer = view.getAuthorizer();
 
         Person user = GlobalVariables.getUserSession().getPerson();
 
         for (Field lineField : lineFields) {
             String propertyName = null;
             if (lineField instanceof DataBinding) {
                 propertyName = ((DataBinding) lineField).getPropertyName();
             }
 
             // evaluate expression on fields component security (since apply model phase has not been invoked on
             // them yet
             ComponentSecurity componentSecurity = lineField.getComponentSecurity();
             ExpressionUtils.adjustPropertyExpressions(view, componentSecurity);
 
             Map<String, Object> context = getContextForField(view, collectionGroup, lineField);
             getExpressionEvaluatorService().evaluateObjectExpressions(componentSecurity, model, context);
 
             // check view field auth
             if (lineField.isRender() && !lineField.isHidden()) {
                 boolean canViewField = authorizer.canViewLineField(view, model, collectionGroup,
                         collectionGroup.getPropertyName(), line, lineField, propertyName, user);
                 if (canViewField) {
                     canViewField = presentationController.canViewLineField(view, model, collectionGroup,
                             collectionGroup.getPropertyName(), line, lineField, propertyName);
                 }
 
                 if (!canViewField) {
                     // since removing can impact layout, set to hidden
                     // TODO: check into encryption setting
                     lineField.setHidden(true);
 
                     if (lineField.getPropertyExpressions().containsKey("hidden")) {
                         lineField.getPropertyExpressions().remove("hidden");
                     }
 
                     continue;
                 }
 
                 // check edit field auth
                 boolean canEditField = !readOnlyLine;
                 if (!readOnlyLine) {
                     canEditField = authorizer.canEditLineField(view, model, collectionGroup,
                             collectionGroup.getPropertyName(), line, lineField, propertyName, user);
                     if (canEditField) {
                         canEditField = presentationController.canEditLineField(view, model, collectionGroup,
                                 collectionGroup.getPropertyName(), line, lineField, propertyName);
                     }
                 }
 
                 if (readOnlyLine || !canEditField) {
                     lineField.setReadOnly(true);
 
                     if (lineField.getPropertyExpressions().containsKey("readOnly")) {
                         lineField.getPropertyExpressions().remove("readOnly");
                     }
                 }
             }
         }
 
         // check auth on line actions
         for (ActionField actionField : actions) {
             if (actionField.isRender()) {
                 boolean canPerformAction = authorizer.canPerformLineAction(view, model, collectionGroup,
                         collectionGroup.getPropertyName(), line, actionField, actionField.getActionEvent(),
                         actionField.getId(), user);
                 if (canPerformAction) {
                     canPerformAction = presentationController.canPerformLineAction(view, model, collectionGroup,
                             collectionGroup.getPropertyName(), line, actionField, actionField.getActionEvent(),
                             actionField.getId());
                 }
 
                 if (!canPerformAction) {
                     actionField.setRender(false);
 
                     if (actionField.getPropertyExpressions().containsKey("render")) {
                         actionField.getPropertyExpressions().remove("render");
                     }
                 }
             }
         }
     }
     
     /**
      * Checks whether the given sub-collection should be rendered, any
      * conditional render string is evaluated
      * 
      * @param view
      *            - view instance the sub collection belongs to
      * @param model
      *            - object containing the view data
      * @param collectionGroup
      *            - collection group the sub collection belongs to
      * @param subCollectionGroup
      *            - sub collection group to check render status for
      * @return boolean true if sub collection should be rendered, false if it
      *         should not be rendered
      */
     protected boolean checkSubCollectionRender(View view, Object model, CollectionGroup collectionGroup,
             CollectionGroup subCollectionGroup) {
         String conditionalRender = subCollectionGroup.getPropertyExpression("render");
 
         // TODO: check authorizer
 
         // evaluate conditional render string if set
         if (StringUtils.isNotBlank(conditionalRender)) {
             Map<String, Object> context = new HashMap<String, Object>();
             context.putAll(view.getContext());
             context.put(UifConstants.ContextVariableNames.PARENT, collectionGroup);
             context.put(UifConstants.ContextVariableNames.COMPONENT, subCollectionGroup);
 
             Boolean render = (Boolean) getExpressionEvaluatorService().evaluateExpression(model, context,
                     conditionalRender);
             subCollectionGroup.setRender(render);
         }
 
         return subCollectionGroup.isRender();
     }
 
 	/**
 	 * Creates new <code>ActionField</code> instances for the line
 	 * 
 	 * <p>
 	 * Adds context to the action fields for the given line so that the line the
 	 * action was performed on can be determined when that action is selected
 	 * </p>
 	 * 
 	 * @param view
 	 *            - view instance the collection belongs to
 	 * @param model
 	 *            - top level object containing the data
 	 * @param collectionGroup
 	 *            - collection group component for the collection
 	 * @param collectionLine
 	 *            - object instance for the current line
 	 * @param lineIndex
 	 *            - index of the line the actions should apply to
 	 */
 	protected List<ActionField> getLineActions(View view, Object model, CollectionGroup collectionGroup,
 			Object collectionLine, int lineIndex) {
         String lineSuffix = UifConstants.IdSuffixes.LINE + Integer.toString(lineIndex);
         if (StringUtils.isNotBlank(collectionGroup.getSubCollectionSuffix())) {
             lineSuffix = collectionGroup.getSubCollectionSuffix() + lineSuffix;
         }
         List<ActionField> lineActions = ComponentUtils.copyFieldList(collectionGroup.getActionFields(), lineSuffix);
 
 		for (ActionField actionField : lineActions) {
 			actionField.addActionParameter(UifParameters.SELLECTED_COLLECTION_PATH, collectionGroup.getBindingInfo()
 					.getBindingPath());
 			actionField.addActionParameter(UifParameters.SELECTED_LINE_INDEX, Integer.toString(lineIndex));
 			actionField.setJumpToIdAfterSubmit(collectionGroup.getId() + "_div");
 
             actionField.setClientSideJs("performCollectionAction('"+collectionGroup.getId()+"');");
 		}
 
 		ComponentUtils.updateContextsForLine(lineActions, collectionLine, lineIndex);
 
 		return lineActions;
 	}
 
 	/**
 	 * Creates new <code>ActionField</code> instances for the add line
 	 * 
 	 * <p>
 	 * Adds context to the action fields for the add line so that the collection
 	 * the action was performed on can be determined
 	 * </p>
 	 * 
 	 * @param view
 	 *            - view instance the collection belongs to
 	 * @param model
 	 *            - top level object containing the data
 	 * @param collectionGroup
 	 *            - collection group component for the collection
 	 */
 	protected List<ActionField> getAddLineActions(View view, Object model, CollectionGroup collectionGroup) {
         String lineSuffix = UifConstants.IdSuffixes.ADD_LINE;
         if (StringUtils.isNotBlank(collectionGroup.getSubCollectionSuffix())) {
             lineSuffix = collectionGroup.getSubCollectionSuffix() + lineSuffix;
         }
         List<ActionField> lineActions = ComponentUtils.copyFieldList(collectionGroup.getAddLineActionFields(),
                 lineSuffix);
 
 		for (ActionField actionField : lineActions) {
 			actionField.addActionParameter(UifParameters.SELLECTED_COLLECTION_PATH, collectionGroup.getBindingInfo()
 					.getBindingPath());
 			actionField.setJumpToIdAfterSubmit(collectionGroup.getId() + "_div");
 			actionField.addActionParameter(UifParameters.ACTION_TYPE, UifParameters.ADD_LINE);
 
             String baseId = collectionGroup.getFactoryId();
             if (StringUtils.isNotBlank(collectionGroup.getSubCollectionSuffix())) {
                 baseId += collectionGroup.getSubCollectionSuffix();
             }
 
             actionField.setClientSideJs("addLineToCollection('"+collectionGroup.getId()+"', '"+ baseId +"');");
 		}
 
 		// get add line for context
 		String addLinePath = collectionGroup.getAddLineBindingInfo().getBindingPath();
 		Object addLine = ObjectPropertyUtils.getPropertyValue(model, addLinePath);
 
 		ComponentUtils.updateContextsForLine(lineActions, addLine, -1);
 
 		return lineActions;
 	}
 
     /**
      * Helper method to build the context for a field (needed because the apply model phase for line fields has
      * not been applied yet and their full context not set)
      *
      * @param view - view instance the field belongs to
      * @param collectionGroup - collection group instance the field belongs to
      * @param field - field instance to build context for
      * @return Map<String, Object> context for field
      */
     protected Map<String, Object> getContextForField(View view, CollectionGroup collectionGroup, Field field) {
         Map<String, Object> context = new HashMap<String, Object>();
 
         context.putAll(view.getContext());
         context.putAll(field.getContext());
         context.put(UifConstants.ContextVariableNames.PARENT, collectionGroup);
         context.put(UifConstants.ContextVariableNames.COMPONENT, field);
 
         return context;
     }
 
     /**
      * Initializes a new instance of the collection class
      * 
      * <p>
      * If the add line property was not specified for the collection group the
      * new lines will be added to the generic map on the
      * <code>UifFormBase</code>, else it will be added to the property given by
      * the addLineBindingInfo
      * </p>
      * 
      * <p>
      * New line will only be created if the current line property is null or
      * clearExistingLine is true. In the case of a new line default values are
      * also applied
      * </p>
      * 
      * @see org.kuali.rice.krad.uif.container.CollectionGroup#
      *      initializeNewCollectionLine(View, Object, CollectionGroup, boolean)
      */
     public void initializeNewCollectionLine(View view, Object model, CollectionGroup collectionGroup,
             boolean clearExistingLine) {
         Object newLine = null;
 
         // determine if we are binding to generic form map or a custom property
         if (StringUtils.isBlank(collectionGroup.getAddLinePropertyName())) {
             // bind to form map
             if (!(model instanceof UifFormBase)) {
                 throw new RuntimeException("Cannot create new collection line for group: "
                         + collectionGroup.getPropertyName() + ". Model does not extend " + UifFormBase.class.getName());
             }
 
             // get new collection line map from form
             Map<String, Object> newCollectionLines = ObjectPropertyUtils.getPropertyValue(model,
                     UifPropertyPaths.NEW_COLLECTION_LINES);
             if (newCollectionLines == null) {
                 newCollectionLines = new HashMap<String, Object>();
                 ObjectPropertyUtils.setPropertyValue(model, UifPropertyPaths.NEW_COLLECTION_LINES, newCollectionLines);
             }
             
             // set binding path for add line
             String newCollectionLineKey = KRADUtils
                     .translateToMapSafeKey(collectionGroup.getBindingInfo().getBindingPath());
             String addLineBindingPath = UifPropertyPaths.NEW_COLLECTION_LINES + "['" + newCollectionLineKey + "']";
             collectionGroup.getAddLineBindingInfo().setBindingPath(addLineBindingPath);
 
             // if there is not an instance available or we need to clear create a new instance
             if (!newCollectionLines.containsKey(newCollectionLineKey)
                     || (newCollectionLines.get(newCollectionLineKey) == null) || clearExistingLine) {
                 // create new instance of the collection type for the add line
                 newLine = ObjectUtils.newInstance(collectionGroup.getCollectionObjectClass());
                 newCollectionLines.put(newCollectionLineKey, newLine);
             }
         } else {
             // bind to custom property
             Object addLine = ObjectPropertyUtils.getPropertyValue(model, collectionGroup.getAddLineBindingInfo()
                     .getBindingPath());
             if ((addLine == null) || clearExistingLine) {
                 newLine = ObjectUtils.newInstance(collectionGroup.getCollectionObjectClass());
                 ObjectPropertyUtils.setPropertyValue(model, collectionGroup.getAddLineBindingInfo().getBindingPath(),
                         newLine);
             }
         }
 
         // apply default values if a new line was created
         if (newLine != null) {
             view.getViewHelperService().applyDefaultValuesForCollectionLine(view, model, collectionGroup, newLine);
         }
     }
     
     protected ExpressionEvaluatorService getExpressionEvaluatorService() {
         return KRADServiceLocatorWeb.getExpressionEvaluatorService();
     }
 
 }