/**

  * Copyright 2005-2011 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.kew.actionlist.dao.impl;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.delegation.DelegationType;

 import org.kuali.rice.core.framework.persistence.jpa.OrmUtils;

 import org.kuali.rice.core.framework.persistence.jpa.criteria.Criteria;

 import org.kuali.rice.core.framework.persistence.jpa.criteria.QueryByCriteria;

 import org.kuali.rice.kew.actionitem.ActionItem;

 import org.kuali.rice.kew.actionitem.ActionItemActionListExtension;

 import org.kuali.rice.kew.actionitem.OutboxItemActionListExtension;

 import org.kuali.rice.kew.actionlist.ActionListFilter;

 import org.kuali.rice.kew.actionlist.dao.ActionListDAO;

 import org.kuali.rice.kew.doctype.bo.DocumentType;

 import org.kuali.rice.kew.routeheader.DocumentRouteHeaderValue;

 import org.kuali.rice.kew.routeheader.DocumentRouteHeaderValueActionListExtension;

 import org.kuali.rice.kew.service.KEWServiceLocator;

 import org.kuali.rice.kew.api.KewApiConstants;

 import org.kuali.rice.kim.api.services.KimApiServiceLocator;

 import javax.persistence.EntityManager;

 import javax.persistence.PersistenceContext;

 import java.sql.Timestamp;

 import java.util.ArrayList;

 import java.util.Calendar;

 import java.util.Collection;

 import java.util.Date;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 /**

  * OJB implementation of the {@link ActionListDAO}.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class ActionListDAOJpaImpl implements ActionListDAO {

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(ActionListDAOJpaImpl.class);

     @PersistenceContext(unitName="kew-unit")

         private EntityManager entityManager;

     public Collection<ActionItem> getActionList(String principalId, ActionListFilter filter) {

         return toActionItemActionListExtensions(getActionItemsInActionList(ActionItem.class, principalId, filter));

     }

     /**

          * This method ...

          * 

          * @param actionItems

          * @return actionItemActionListExtensions

          */

         private Collection<ActionItem> toActionItemActionListExtensions(

                         Collection<ActionItem> actionItems) {

                 List<ActionItem> actionItemActionListExtensions = new ArrayList<ActionItem>();

                 for(ActionItem actionItem:actionItems){

                         actionItemActionListExtensions.add(toActionItemActionListExtension(actionItem));

                 }

                 return actionItemActionListExtensions;

         }

         /**

          * This method ...

          * 

          * @param actionItem

          * @return

          */

         private ActionItemActionListExtension toActionItemActionListExtension(

                         ActionItem actionItem) {

                 if(actionItem==null){

                         return null;

                 }

                 ActionItemActionListExtension actionItemExt = new ActionItemActionListExtension();

                 actionItemExt.setId(actionItem.getId());

                 actionItemExt.setPrincipalId(actionItem.getPrincipalId());

                 actionItemExt.setDateAssigned(actionItem.getDateAssigned());

                 actionItemExt.setActionRequestCd(actionItem.getActionRequestCd());

                 actionItemExt.setActionRequestId(actionItem.getActionRequestId());

                 actionItemExt.setDocumentId(actionItem.getDocumentId());

                 actionItemExt.setResponsibilityId(actionItem.getResponsibilityId());

                 actionItemExt.setGroupId(actionItem.getGroupId());

                 actionItemExt.setRoleName(actionItem.getRoleName());

                 actionItemExt.setDocTitle(actionItem.getDocTitle());

                 actionItemExt.setDocLabel(actionItem.getDocLabel());

                 actionItemExt.setDocHandlerURL(actionItem.getDocHandlerURL());

                 actionItemExt.setDocName(actionItem.getDocName());

                 actionItemExt.setDelegatorPrincipalId(actionItem.getDelegatorPrincipalId());

                 actionItemExt.setDelegatorGroupId(actionItem.getDelegatorGroupId());

                 actionItemExt.setDelegationType(actionItem.getDelegationType());

                 actionItemExt.setLockVerNbr(actionItem.getLockVerNbr());

                 actionItemExt.setDocumentId(actionItem.getDocumentId());

                 actionItemExt.setRequestLabel(actionItem.getRequestLabel());

                 //actionItemExt.setRouteHeader(toDocumentRouteHeaderValueActionListExtension(actionItem.getRouteHeader()));

                 // These properties are not mapped in OJB-repository-kew.xml

                 // actionItemExt.setActionItemIndex(actionItem.getActionItemIndex());

                 // actionItemExt.setActionToTake(actionItem.getActionToTake());

                 // actionItemExt.setCustomActions(actionItem.getCustomActions());

                 // actionItemExt.setDateAssignedString(actionItem.getDateAssignedString());

                 // actionItemExt.setDelegatorGroup();

                 // actionItemExt.setDisplayParameters();

                 // FIXME this causes null pointer - actionItemExt.setGroup(actionItem.getGroup());

                 // actionItemExt.setLastApprovedDate(actionItem.getLastApprovedDate());

                 // actionItemExt.setRowStyleClass();

                 return actionItemExt;

         }

         /**

          * This method ...

          * 

          * @param routeHeader

          * @return

          */

         private DocumentRouteHeaderValueActionListExtension toDocumentRouteHeaderValueActionListExtension(

                         DocumentRouteHeaderValue routeHeader) {

                 if(routeHeader==null){

                         return null;

                 }

                 DocumentRouteHeaderValueActionListExtension extension = new DocumentRouteHeaderValueActionListExtension();

                 extension.setDocumentId(routeHeader.getDocumentId());

                 extension.setDocumentTypeId(routeHeader.getDocumentTypeId());

                 extension.setDocRouteStatus(routeHeader.getDocRouteStatus());

                 extension.setDocRouteLevel(routeHeader.getDocRouteLevel());

                 extension.setStatusModDate(routeHeader.getStatusModDate());

                 extension.setCreateDate(routeHeader.getCreateDate());

                 extension.setApprovedDate(routeHeader.getApprovedDate());

                 extension.setFinalizedDate(routeHeader.getFinalizedDate());

                 extension.setRouteStatusDate(routeHeader.getRouteStatusDate());

                 extension.setRouteLevelDate(routeHeader.getRouteLevelDate());

                 extension.setDocTitle(routeHeader.getDocTitle());

                 extension.setAppDocId(routeHeader.getAppDocId());

                 extension.setDocVersion(routeHeader.getDocVersion());

                 extension.setInitiatorWorkflowId(routeHeader.getInitiatorWorkflowId());

                 extension.setVersionNumber(routeHeader.getVersionNumber());

                 extension.setAppDocStatus(routeHeader.getAppDocStatus());

                 extension.setAppDocStatusDate(routeHeader.getAppDocStatusDate());

                 return extension;

         }

         public Collection<ActionItem> getActionListForSingleDocument(String documentId) {

         LOG.debug("getting action list for document id " + documentId);

         Criteria crit = new Criteria(ActionItem.class.getName());

         crit.eq("documentId", documentId);

         crit.eq("TYPE(__JPA_ALIAS[[0]]__)", ActionItem.class);

         Collection<ActionItem> collection = new QueryByCriteria(entityManager, crit).toQuery().getResultList();

         LOG.debug("found " + collection.size() + " action items for document id " + documentId);

         return toActionItemActionListExtensions(createActionListForRouteHeader(collection));

     }

     private Criteria setUpActionListCriteria(Class objectsToRetrieve, String principalId, ActionListFilter filter) {

         LOG.debug("setting up Action List criteria");

         Criteria crit = new Criteria(objectsToRetrieve.getName());

         boolean filterOn = false;

         String filteredByItems = "";

         if (filter.getActionRequestCd() != null && !"".equals(filter.getActionRequestCd().trim()) && !filter.getActionRequestCd().equals(KewApiConstants.ALL_CODE)) {

             if (filter.isExcludeActionRequestCd()) {

                 crit.ne("actionRequestCd", filter.getActionRequestCd());

             } else {

                 crit.eq("actionRequestCd", filter.getActionRequestCd());

             }

             filteredByItems += filteredByItems.length() > 0 ? ", " : "";

             filteredByItems += "Action Requested";

         }

         if (filter.getCreateDateFrom() != null || filter.getCreateDateTo() != null) {

             if (filter.isExcludeCreateDate()) {

                 if (filter.getCreateDateFrom() != null && filter.getCreateDateTo() != null) {

                     crit.notBetween("routeHeader.createDate", new Timestamp(beginningOfDay(filter.getCreateDateFrom()).getTime()), new Timestamp(endOfDay(filter.getCreateDateTo()).getTime()));

                 } else if (filter.getCreateDateFrom() != null && filter.getCreateDateTo() == null) {

                     crit.lte("routeHeader.createDate", new Timestamp(beginningOfDay(filter.getCreateDateFrom()).getTime()));

                 } else if (filter.getCreateDateFrom() == null && filter.getCreateDateTo() != null) {

                     crit.gte("routeHeader.createDate", new Timestamp(endOfDay(filter.getCreateDateTo()).getTime()));

                 }

             } else {

                 if (filter.getCreateDateFrom() != null && filter.getCreateDateTo() != null) {

                     crit.between("routeHeader.createDate", new Timestamp(beginningOfDay(filter.getCreateDateFrom()).getTime()), new Timestamp(endOfDay(filter.getCreateDateTo()).getTime()));

                 } else if (filter.getCreateDateFrom() != null && filter.getCreateDateTo() == null) {

                     crit.gte("routeHeader.createDate", new Timestamp(beginningOfDay(filter.getCreateDateFrom()).getTime()));

                 } else if (filter.getCreateDateFrom() == null && filter.getCreateDateTo() != null) {

                     crit.lte("routeHeader.createDate", new Timestamp(endOfDay(filter.getCreateDateTo()).getTime()));

                 }

             }

             filteredByItems += filteredByItems.length() > 0 ? ", " : "";

             filteredByItems += "Date Created";

         }

         if (filter.getDocRouteStatus() != null && !"".equals(filter.getDocRouteStatus().trim()) && !filter.getDocRouteStatus().equals(KewApiConstants.ALL_CODE)) {

             if (filter.isExcludeRouteStatus()) {

                 crit.ne("routeHeader.docRouteStatus", filter.getDocRouteStatus());

             } else {

                 crit.eq("routeHeader.docRouteStatus", filter.getDocRouteStatus());

             }

             filteredByItems += filteredByItems.length() > 0 ? ", " : "";

             filteredByItems += "Document Route Status";

         }

         if (filter.getDocumentTitle() != null && !"".equals(filter.getDocumentTitle().trim())) {

             String docTitle = filter.getDocumentTitle();

             if (docTitle.trim().endsWith("*")) {

                 docTitle = docTitle.substring(0, docTitle.length() - 1);

             }

             if (filter.isExcludeDocumentTitle()) {

                 crit.notLike("docTitle", "%" + docTitle + "%");

             } else {

                 crit.like("docTitle", "%" + docTitle + "%");

             }

             filteredByItems += filteredByItems.length() > 0 ? ", " : "";

             filteredByItems += "Document Title";

         }

         if (filter.getDocumentType() != null && !"".equals(filter.getDocumentType().trim())) {

             if (filter.isExcludeDocumentType()) {

                 crit.notLike("docName", "%" + filter.getDocumentType() + "%");

             } else {

                     String documentTypeName = filter.getDocumentType();

                     DocumentType documentType = KEWServiceLocator.getDocumentTypeService().findByName(documentTypeName);

                     if (documentType == null) {

                         crit.like("docName", "%" + filter.getDocumentType() + "%");

                     } else {

                         // search this document type plus it's children

                         Criteria docTypeCrit = new Criteria(objectsToRetrieve.getName());

                         constructDocumentTypeCriteria(objectsToRetrieve.getName(), docTypeCrit, documentType);

                         crit.and(docTypeCrit);

                     }

             }

             filteredByItems += filteredByItems.length() > 0 ? ", " : "";

             filteredByItems += "Document Type";

         }

         if (filter.getLastAssignedDateFrom() != null || filter.getLastAssignedDateTo() != null) {

             if (filter.isExcludeLastAssignedDate()) {

                 if (filter.getLastAssignedDateFrom() != null && filter.getLastAssignedDateTo() != null) {

                     crit.notBetween("dateAssigned", new Timestamp(beginningOfDay(filter.getLastAssignedDateFrom()).getTime()), new Timestamp(endOfDay(filter.getLastAssignedDateTo()).getTime()));

                 } else if (filter.getLastAssignedDateFrom() != null && filter.getLastAssignedDateTo() == null) {

                     crit.lte("dateAssigned", new Timestamp(beginningOfDay(filter.getLastAssignedDateFrom()).getTime()));

                 } else if (filter.getLastAssignedDateFrom() == null && filter.getLastAssignedDateTo() != null) {

                     crit.gte("dateAssigned", new Timestamp(endOfDay(filter.getLastAssignedDateTo()).getTime()));

                 }

             } else {

                 if (filter.getLastAssignedDateFrom() != null && filter.getLastAssignedDateTo() != null) {

                     crit.between("dateAssigned", new Timestamp(beginningOfDay(filter.getLastAssignedDateFrom()).getTime()), new Timestamp(endOfDay(filter.getLastAssignedDateTo()).getTime()));

                 } else if (filter.getLastAssignedDateFrom() != null && filter.getLastAssignedDateTo() == null) {

                     crit.gte("dateAssigned", new Timestamp(beginningOfDay(filter.getLastAssignedDateFrom()).getTime()));

                 } else if (filter.getLastAssignedDateFrom() == null && filter.getLastAssignedDateTo() != null) {

                     crit.lte("dateAssigned", new Timestamp(endOfDay(filter.getLastAssignedDateTo()).getTime()));

                 }

             }

             filteredByItems += filteredByItems.length() > 0 ? ", " : "";

             filteredByItems += "Date Last Assigned";

         }

         filter.setGroupId(null);

         if (filter.getGroupIdString() != null && !"".equals(filter.getGroupIdString().trim()) && !filter.getGroupIdString().trim().equals(KewApiConstants.NO_FILTERING)) {

             filter.setGroupId(filter.getGroupId());

             if (filter.isExcludeGroupId()) {

                 Criteria critNotEqual = new Criteria(objectsToRetrieve.getName());

                 critNotEqual.ne("groupId", filter.getGroupId());

                 Criteria critNull = new Criteria(objectsToRetrieve.getName());

                 critNull.isNull("groupId");

                 critNotEqual.or(critNull);

                 crit.and(critNotEqual);

             } else {

                 crit.eq("groupId", filter.getGroupId());

             }

             filteredByItems += filteredByItems.length() > 0 ? ", " : "";

             filteredByItems += "Action Request Workgroup";

         }

         if (filteredByItems.length() > 0) {

             filterOn = true;

         }

         boolean addedDelegationCriteria = false;

         if (StringUtils.isBlank(filter.getDelegationType()) && StringUtils.isBlank(filter.getPrimaryDelegateId()) && StringUtils.isBlank(filter.getDelegatorId())) {

             crit.eq("principalId", principalId);

             addedDelegationCriteria = true;

         } else if ((StringUtils.isNotBlank(filter.getDelegationType()) && DelegationType.PRIMARY.getCode().equals(filter.getDelegationType()))

                 || StringUtils.isNotBlank(filter.getPrimaryDelegateId())) {

             // using a primary delegation

             if ((StringUtils.isBlank(filter.getPrimaryDelegateId())) || (filter.getPrimaryDelegateId().trim().equals(KewApiConstants.ALL_CODE))) {

                 // user wishes to see all primary delegations

                 Criteria userCrit = new Criteria(objectsToRetrieve.getName());

                 Criteria groupCrit = new Criteria(objectsToRetrieve.getName());

                 Criteria orCrit = new Criteria(objectsToRetrieve.getName());

                 userCrit.eq("delegatorPrincipalId", principalId);

                 List<String> userGroupIds = new ArrayList<String>();

                 for(String id: KimApiServiceLocator.getGroupService().getGroupIdsByPrincipalId(principalId)){

                         userGroupIds.add(id);

                 }

                 if (!userGroupIds.isEmpty()) {

                         groupCrit.in("delegatorGroupId", userGroupIds);

                 }

                 orCrit.or(userCrit);

                 orCrit.or(groupCrit);

                 crit.and(orCrit);

                 crit.eq("delegationType", DelegationType.PRIMARY.getCode());

                 filter.setDelegationType(DelegationType.PRIMARY.getCode());

                 filter.setExcludeDelegationType(false);

                 addToFilterDescription(filteredByItems, "Primary Delegator Id");

                 addedDelegationCriteria = true;

                 filterOn = true;

             } else if (!filter.getPrimaryDelegateId().trim().equals(KewApiConstants.PRIMARY_DELEGATION_DEFAULT)) {

                 // user wishes to see primary delegation for a single user

                 crit.eq("principalId", filter.getPrimaryDelegateId());

                 Criteria userCrit = new Criteria(objectsToRetrieve.getName());

                 Criteria groupCrit = new Criteria(objectsToRetrieve.getName());

                 Criteria orCrit = new Criteria(objectsToRetrieve.getName());

                 userCrit.eq("delegatorPrincipalId", principalId);

                 List<String> userGroupIds = new ArrayList<String>();

                 for(String id: KimApiServiceLocator.getGroupService().getGroupIdsByPrincipalId(principalId)){

                         userGroupIds.add(id);

                 }

                 if (!userGroupIds.isEmpty()) {

                         groupCrit.in("delegatorGroupId", userGroupIds);

                 }

                 orCrit.or(userCrit);

                 orCrit.or(groupCrit);

                 crit.and(orCrit);

                 crit.eq("delegationType", DelegationType.PRIMARY.getCode());

                 filter.setDelegationType(DelegationType.PRIMARY.getCode());

                 filter.setExcludeDelegationType(false);

                 addToFilterDescription(filteredByItems, "Primary Delegator Id");

                 addedDelegationCriteria = true;

                 filterOn = true;

             }

         }

         if (!addedDelegationCriteria && ( (StringUtils.isNotBlank(filter.getDelegationType()) && DelegationType.SECONDARY.getCode().equals(filter.getDelegationType()))

                 || StringUtils.isNotBlank(filter.getDelegatorId()) )) {

             // using a secondary delegation

             crit.eq("principalId", principalId);

             if (StringUtils.isBlank(filter.getDelegatorId())) {

                 filter.setDelegationType(DelegationType.SECONDARY.getCode());

                 // if isExcludeDelegationType() we want to show the default aciton list which is set up later in this method

                 if (!filter.isExcludeDelegationType()) {

                     crit.eq("delegationType", DelegationType.SECONDARY.getCode());

                     addToFilterDescription(filteredByItems, "Secondary Delegator Id");

                     addedDelegationCriteria = true;

                     filterOn = true;

                 }

             } else if (filter.getDelegatorId().trim().equals(KewApiConstants.ALL_CODE)) {

                 // user wishes to see all secondary delegations

                 crit.eq("delegationType", DelegationType.SECONDARY.getCode());

                 filter.setDelegationType(DelegationType.SECONDARY.getCode());

                 filter.setExcludeDelegationType(false);

                 addToFilterDescription(filteredByItems, "Secondary Delegator Id");

                 addedDelegationCriteria = true;

                 filterOn = true;

             } else if (!filter.getDelegatorId().trim().equals(

                     KewApiConstants.DELEGATION_DEFAULT)) {

                 // user has specified an id to see for secondary delegation

                 filter.setDelegationType(DelegationType.SECONDARY.getCode());

                 filter.setExcludeDelegationType(false);

                 Criteria userCrit = new Criteria(objectsToRetrieve.getName());

                 Criteria groupCrit = new Criteria(objectsToRetrieve.getName());

                 if (filter.isExcludeDelegatorId()) {

                     Criteria userNull = new Criteria(objectsToRetrieve.getName());

                     userCrit.ne("delegatorPrincipalId", filter.getDelegatorId());

                     userNull.isNull("delegatorPrincipalId");

                     userCrit.or(userNull);

                     Criteria groupNull = new Criteria(objectsToRetrieve.getName());

                     groupCrit.ne("delegatorGroupId", filter.getDelegatorId());

                     groupNull.isNull("delegatorGroupId");

                     groupCrit.or(groupNull);

                     crit.and(userCrit);

                     crit.and(groupCrit);

                 } else {

                     userCrit.eq("delegatorPrincipalId", filter.getDelegatorId());

                     groupCrit.eq("delegatorGroupId", filter.getDelegatorId());

                     userCrit.or(groupCrit);

                     crit.and(userCrit);

                 }

                 addToFilterDescription(filteredByItems, "Secondary Delegator Id");

                 addedDelegationCriteria = true;

                 filterOn = true;

             }

         }

         // if we haven't added delegation criteria then use the default criteria below

         if (!addedDelegationCriteria) {

             crit.eq("principalId", principalId);

             filter.setDelegationType(DelegationType.SECONDARY.getCode());

             filter.setExcludeDelegationType(true);

             Criteria critNotEqual = new Criteria(objectsToRetrieve.getName());

             Criteria critNull = new Criteria(objectsToRetrieve.getName());

             critNotEqual.ne("delegationType", DelegationType.SECONDARY.getCode());

             critNull.isNull("delegationType");

             critNotEqual.or(critNull);

             crit.and(critNotEqual);

         }

         if (! "".equals(filteredByItems)) {

             filteredByItems = "Filtered by " + filteredByItems;

         }

         filter.setFilterLegend(filteredByItems);

         filter.setFilterOn(filterOn);

         LOG.debug("returning from Action List criteria");

         return crit;

     }

     private void constructDocumentTypeCriteria(String entityName, Criteria criteria, DocumentType documentType) {

             // search this document type plus it's children

             Criteria docTypeBaseCrit = new Criteria(entityName);

             docTypeBaseCrit.eq("docName", documentType.getName());

             criteria.or(docTypeBaseCrit);

             Collection children = documentType.getChildrenDocTypes();

             if (children != null) {

                 for (Iterator iterator = children.iterator(); iterator.hasNext();) {

                         DocumentType childDocumentType = (DocumentType) iterator.next();

                         constructDocumentTypeCriteria(entityName, criteria, childDocumentType);

                 }

             }

     }

     private void addToFilterDescription(String filterDescription, String labelToAdd) {

         filterDescription += filterDescription.length() > 0 ? ", " : "";

         filterDescription += labelToAdd;

     }

     private static final String ACTION_LIST_COUNT_QUERY = "select count(distinct(ai.doc_hdr_id)) from krew_actn_itm_t ai where ai.PRNCPL_ID = ? and (ai.dlgn_typ is null or ai.dlgn_typ = 'P')";

     public int getCount(final String workflowId) {

             javax.persistence.Query q = entityManager.createNativeQuery(ACTION_LIST_COUNT_QUERY);

             q.setParameter(1, workflowId);

             Number result = (Number)q.getSingleResult();

             return result.intValue();

     }

     /**

      * Creates an Action List from the given collection of Action Items.  The Action List should

      * contain only one action item per document.  The action item chosen should be the most "critical"

      * or "important" one on the document.

      *

      * @return the Action List as a Collection of ActionItems

      */

     private <T extends ActionItem> Collection<T> createActionListForUser(Collection<T> actionItems) {

         Map<String, T> actionItemMap = new HashMap<String, T>();

         ActionListPriorityComparator comparator = new ActionListPriorityComparator();

         for (T potentialActionItem: actionItems) {

             T existingActionItem = actionItemMap.get(potentialActionItem.getDocumentId());

             if (existingActionItem == null || comparator.compare(potentialActionItem, existingActionItem) > 0) {

                 actionItemMap.put(potentialActionItem.getDocumentId(), potentialActionItem);

             }

         }

         return actionItemMap.values();

     }

     /**

      * Creates an Action List from the given collection of Action Items.  The Action List should

      * contain only one action item per user.  The action item chosen should be the most "critical"

      * or "important" one on the document.

      *

      * @return the Action List as a Collection of ActionItems

      */

     private Collection<ActionItem> createActionListForRouteHeader(Collection<ActionItem> actionItems) {

         Map<String, ActionItem> actionItemMap = new HashMap<String, ActionItem>();

         ActionListPriorityComparator comparator = new ActionListPriorityComparator();

         for (ActionItem potentialActionItem: actionItems) {

             ActionItem existingActionItem = actionItemMap.get(potentialActionItem.getPrincipalId());

             if (existingActionItem == null || comparator.compare(potentialActionItem, existingActionItem) > 0) {

                 actionItemMap.put(potentialActionItem.getPrincipalId(), potentialActionItem);

             }

         }

         return actionItemMap.values();

     }

     private <T extends ActionItem> Collection<ActionItem> getActionItemsInActionList(Class<T> objectsToRetrieve, String principalId, ActionListFilter filter) {

         LOG.debug("getting action list for user " + principalId);

         Criteria crit = null;

         if (filter == null) {

             crit = new Criteria(objectsToRetrieve.getName());

             crit.eq("principalId", principalId);

         } else {

             crit = setUpActionListCriteria(objectsToRetrieve, principalId, filter);

         }

         LOG.debug("running query to get action list for criteria " + crit);

         Collection<ActionItem> collection = new QueryByCriteria(entityManager, crit).toQuery().getResultList();

         LOG.debug("found " + collection.size() + " action items for user " + principalId);

         return createActionListForUser(collection);

     }

     public Collection<ActionItem> getOutbox(String principalId, ActionListFilter filter) {

         return getActionItemsInActionList(OutboxItemActionListExtension.class, principalId, filter);

     }

     /**

      * Deletes all outbox items specified by the list of ids

      * 

      * @see org.kuali.rice.kew.actionlist.dao.ActionListDAO#removeOutboxItems(String, java.util.List)

      */

     public void removeOutboxItems(String principalId, List<String> outboxItems) {

         Criteria crit = new Criteria(OutboxItemActionListExtension.class.getName());

         crit.in("id", outboxItems);

         for(Object entity:new QueryByCriteria(entityManager, crit).toQuery().getResultList()){

                 entityManager.remove(entity);

         }

     }

     /**

      * Saves an outbox item

      * 

      * @see org.kuali.rice.kew.actionlist.dao.ActionListDAO#saveOutboxItem(org.kuali.rice.kew.actionitem.OutboxItemActionListExtension)

      */

     public void saveOutboxItem(OutboxItemActionListExtension outboxItem) {

             if(outboxItem.getId()==null){

                     entityManager.persist(outboxItem);

             }else{

               //TODO, merge will not update the outboxitem pointer to the merged entity

                     OrmUtils.merge(entityManager, outboxItem);

             }

             entityManager.flush();

     }

     /**

      * Gets the outbox item associated with the document id

      * 

      * @see org.kuali.rice.kew.actionlist.dao.ActionListDAO#getOutboxByDocumentId(java.lang.Long)

      */

     public OutboxItemActionListExtension getOutboxByDocumentId(String documentId) {

         Criteria crit = new Criteria(OutboxItemActionListExtension.class.getName());

         crit.eq("documentId", documentId);

         return (OutboxItemActionListExtension) new QueryByCriteria(entityManager, crit).toQuery().getSingleResult();

     }

     /**

      * This overridden method ...

      * 

      * @see org.kuali.rice.kew.actionlist.dao.ActionListDAO#getOutboxByDocumentIdUserId(Long, String)

      */

     public OutboxItemActionListExtension getOutboxByDocumentIdUserId(String documentId, String userId) {

         Criteria crit = new Criteria(OutboxItemActionListExtension.class.getName());

         crit.eq("documentId", documentId);

         crit.eq("principalId", userId);

                return (OutboxItemActionListExtension) new QueryByCriteria(entityManager, crit).toQuery().getSingleResult();

     }

     private Date beginningOfDay(Date date) {

         Calendar cal = Calendar.getInstance();

         cal.setTime(date);

         cal.set(Calendar.HOUR_OF_DAY, 0);

         cal.set(Calendar.MINUTE, 0);

         cal.set(Calendar.SECOND, 0);

         return cal.getTime();

     }

     private Date endOfDay(Date date) {

         Calendar cal = Calendar.getInstance();

         cal.setTime(date);

         cal.set(Calendar.HOUR_OF_DAY, 23);

         cal.set(Calendar.MINUTE, 59);

         cal.set(Calendar.SECOND, 59);

         return cal.getTime();        

     }

     public EntityManager getEntityManager() {

         return this.entityManager;

     }

     public void setEntityManager(EntityManager entityManager) {

         this.entityManager = entityManager;

     }

 }