/* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* 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.activiti.engine.impl.cmd;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.TaskEntity;
import org.activiti.engine.task.IdentityLinkType;
/**
* @author Tom Baeyens
* @author Falko Menge
* @author Joram Barrez
*/
public class DeleteIdentityLinkCmd extends NeedsActiveTaskCmd<Void> {
private static final long serialVersionUID = 1L;
protected String userId;
protected String groupId;
protected String type;
public DeleteIdentityLinkCmd(String taskId, String userId, String groupId, String type) {
super(taskId);
validateParams(userId, groupId, type, taskId);
this.taskId = taskId;
this.userId = userId;
this.groupId = groupId;
this.type = type;
}
protected void validateParams(String userId, String groupId, String type, String taskId) {
if(taskId == null) {
throw new ActivitiException("taskId is null");
}
if (type == null) {
throw new ActivitiException("type is required when adding a new task identity link");
}
// Special treatment for assignee and owner: group cannot be used and userId may be null
if (IdentityLinkType.ASSIGNEE.equals(type) || IdentityLinkType.OWNER.equals(type)) {
if (groupId != null) {
throw new ActivitiException("Incompatible usage: cannot use type '" + type
+ "' together with a groupId");
}
} else {
if (userId == null && groupId == null) {
throw new ActivitiException("userId and groupId cannot both be null");
}
}
}
protected Void execute(CommandContext commandContext, TaskEntity task) {
if (IdentityLinkType.ASSIGNEE.equals(type)) {
task.setAssignee(null);
} else if (IdentityLinkType.OWNER.equals(type)) {
task.setOwner(null);
} else {
task.deleteIdentityLink(userId, groupId, type);
}
commandContext.getHistoryManager()
.createIdentityLinkComment(taskId, userId, groupId, type, false);
return null;
}
}