001 /*
002 * Copyright 2007-2009 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016 package org.kuali.rice.kim.service.impl;
017
018 import java.util.ArrayList;
019 import java.util.Collections;
020 import java.util.HashSet;
021 import java.util.List;
022 import java.util.Set;
023
024 import javax.xml.namespace.QName;
025
026 import org.apache.commons.collections.ListUtils;
027 import org.apache.commons.lang.StringUtils;
028 import org.kuali.rice.kew.api.WorkflowRuntimeException;
029 import org.kuali.rice.kew.messaging.MessageServiceNames;
030 import org.kuali.rice.kew.util.KEWConstants;
031 import org.kuali.rice.kew.workgroup.WorkgroupMembershipChangeProcessor;
032 import org.kuali.rice.kim.api.services.KimApiServiceLocator;
033 import org.kuali.rice.kim.impl.group.GroupBo;
034 import org.kuali.rice.kim.api.group.GroupService;
035 import org.kuali.rice.kim.service.GroupInternalService;
036 import org.kuali.rice.krad.service.BusinessObjectService;
037 import org.kuali.rice.krad.service.KRADServiceLocator;
038 import org.kuali.rice.ksb.api.KsbApiServiceLocator;
039 import org.kuali.rice.ksb.messaging.service.KSBXMLService;
040
041 /**
042 * Concrete Implementation of {@link GroupInternalService}
043 *
044 * @author Kuali Rice Team (rice.collab@kuali.org)
045 *
046 */
047 public class GroupInternalServiceImpl implements GroupInternalService {
048 protected BusinessObjectService getBusinessObjectService() {
049 return KRADServiceLocator.getBusinessObjectService();
050 }
051
052
053 public GroupService getGroupService(){
054 return KimApiServiceLocator.getGroupService();
055 }
056
057 public GroupBo saveWorkgroup(GroupBo group) {
058 GroupService ims = getGroupService();
059 List<String> oldIds = Collections.EMPTY_LIST;
060 if (StringUtils.isNotEmpty(group.getId())) {
061 oldIds = ims.getMemberPrincipalIds(group.getId());
062 }
063 group = (GroupBo)getBusinessObjectService().save( group );
064 List<String> newIds = ims.getMemberPrincipalIds(group.getId());
065 updateForWorkgroupChange(group.getId(), oldIds, newIds);
066 return group;
067 }
068
069 public void updateForWorkgroupChange(String groupId,
070 List<String> oldPrincipalIds, List<String> newPrincipalIds) {
071 MembersDiff membersDiff = getMembersDiff(oldPrincipalIds, newPrincipalIds);
072 for (String removedPrincipalId : membersDiff.getRemovedPrincipalIds()) {
073 updateForUserRemovedFromGroup(removedPrincipalId, groupId);
074 }
075 for (String addedPrincipalId : membersDiff.getAddedPrincipalIds()) {
076 updateForUserAddedToGroup(addedPrincipalId, groupId);
077 }
078 }
079
080 public void updateForUserAddedToGroup(String principalId, String groupId) {
081 // first verify that the user is still a member of the workgroup
082 if(getGroupService().isMemberOfGroup(principalId, groupId))
083 {
084 KSBXMLService workgroupMembershipChangeProcessor = (KSBXMLService) KsbApiServiceLocator.getMessageHelper()
085 .getServiceAsynchronously(new QName(KEWConstants.KEW_MODULE_NAMESPACE, MessageServiceNames.WORKGROUP_MEMBERSHIP_CHANGE_SERVICE));
086 try {
087 workgroupMembershipChangeProcessor.invoke(WorkgroupMembershipChangeProcessor
088 .getMemberAddedMessageContents(principalId, groupId));
089 } catch (Exception e) {
090 throw new WorkflowRuntimeException(e);
091 }
092 }
093 }
094
095 public void updateForUserRemovedFromGroup(String principalId, String groupId) {
096 // first verify that the user is no longer a member of the workgroup
097 if(!getGroupService().isMemberOfGroup(principalId, groupId))
098 {
099 KSBXMLService workgroupMembershipChangeProcessor = (KSBXMLService) KsbApiServiceLocator.getMessageHelper()
100 .getServiceAsynchronously(new QName(KEWConstants.KEW_MODULE_NAMESPACE, MessageServiceNames.WORKGROUP_MEMBERSHIP_CHANGE_SERVICE));
101 try {
102 workgroupMembershipChangeProcessor.invoke(WorkgroupMembershipChangeProcessor
103 .getMemberRemovedMessageContents(principalId, groupId));
104 } catch (Exception e) {
105 throw new WorkflowRuntimeException(e);
106 }
107 }
108
109 }
110
111 private MembersDiff getMembersDiff(List<String> oldMemberPrincipalIds, List<String> newMemberPrincipalIds) {
112
113 // ListUtils does not check the null case. Which can happen when adding a new group
114 // so, if they're null make them empty lists.
115 if(oldMemberPrincipalIds == null) oldMemberPrincipalIds = new ArrayList<String>();
116 if(newMemberPrincipalIds == null) newMemberPrincipalIds = new ArrayList<String>();
117
118 Set<String> addedPrincipalIds = new HashSet<String>(ListUtils.subtract(newMemberPrincipalIds, oldMemberPrincipalIds));
119 Set<String> removedPrincipalIds = new HashSet<String>(ListUtils.subtract(oldMemberPrincipalIds, newMemberPrincipalIds));
120 return new MembersDiff(addedPrincipalIds, removedPrincipalIds);
121 }
122
123 private class MembersDiff {
124 private final Set<String> addedPrincipalIds;
125
126 private final Set<String> removedPrincipalIds;
127
128 public MembersDiff(Set<String> addedPrincipalIds, Set<String>removedPrincipalIds) {
129 this.addedPrincipalIds = addedPrincipalIds;
130 this.removedPrincipalIds = removedPrincipalIds;
131 }
132
133 public Set<String> getAddedPrincipalIds() {
134 return addedPrincipalIds;
135 }
136
137 public Set<String> getRemovedPrincipalIds() {
138 return removedPrincipalIds;
139 }
140 }
141
142 }