/* 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.bpmn.behavior;
import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.ActivitiIllegalArgumentException;
import org.activiti.engine.delegate.Expression;
import org.activiti.engine.delegate.TaskListener;
import org.activiti.engine.delegate.event.ActivitiEventType;
import org.activiti.engine.delegate.event.impl.ActivitiEventBuilder;
import org.activiti.engine.impl.calendar.BusinessCalendar;
import org.activiti.engine.impl.calendar.DueDateBusinessCalendar;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
import org.activiti.engine.impl.persistence.entity.TaskEntity;
import org.activiti.engine.impl.pvm.delegate.ActivityExecution;
import org.activiti.engine.impl.task.TaskDefinition;
/**
* activity implementation for the user task.
*
* @author Joram Barrez
*/
public class UserTaskActivityBehavior extends TaskActivityBehavior {
protected TaskDefinition taskDefinition;
public UserTaskActivityBehavior(TaskDefinition taskDefinition) {
this.taskDefinition = taskDefinition;
}
public void execute(ActivityExecution execution) throws Exception {
TaskEntity task = TaskEntity.createAndInsert(execution);
task.setExecution(execution);
task.setTaskDefinition(taskDefinition);
if (taskDefinition.getNameExpression() != null) {
String name = (String) taskDefinition.getNameExpression().getValue(execution);
task.setName(name);
}
if (taskDefinition.getDescriptionExpression() != null) {
String description = (String) taskDefinition.getDescriptionExpression().getValue(execution);
task.setDescription(description);
}
if(taskDefinition.getDueDateExpression() != null) {
Object dueDate = taskDefinition.getDueDateExpression().getValue(execution);
if(dueDate != null) {
if (dueDate instanceof Date) {
task.setDueDate((Date) dueDate);
} else if (dueDate instanceof String) {
BusinessCalendar businessCalendar = Context
.getProcessEngineConfiguration()
.getBusinessCalendarManager()
.getBusinessCalendar(DueDateBusinessCalendar.NAME);
task.setDueDate(businessCalendar.resolveDuedate((String) dueDate));
} else {
throw new ActivitiIllegalArgumentException("Due date expression does not resolve to a Date or Date string: " +
taskDefinition.getDueDateExpression().getExpressionText());
}
}
}
if (taskDefinition.getPriorityExpression() != null) {
final Object priority = taskDefinition.getPriorityExpression().getValue(execution);
if (priority != null) {
if (priority instanceof String) {
try {
task.setPriority(Integer.valueOf((String) priority));
} catch (NumberFormatException e) {
throw new ActivitiIllegalArgumentException("Priority does not resolve to a number: " + priority, e);
}
} else if (priority instanceof Number) {
task.setPriority(((Number) priority).intValue());
} else {
throw new ActivitiIllegalArgumentException("Priority expression does not resolve to a number: " +
taskDefinition.getPriorityExpression().getExpressionText());
}
}
}
if (taskDefinition.getCategoryExpression() != null) {
final Object category = taskDefinition.getCategoryExpression().getValue(execution);
if (category != null) {
if (category instanceof String) {
task.setCategory((String) category);
} else {
throw new ActivitiIllegalArgumentException("Category expression does not resolve to a string: " +
taskDefinition.getCategoryExpression().getExpressionText());
}
}
}
if (taskDefinition.getFormKeyExpression() != null) {
final Object formKey = taskDefinition.getFormKeyExpression().getValue(execution);
if (formKey != null) {
if (formKey instanceof String) {
task.setFormKey((String) formKey);
} else {
throw new ActivitiIllegalArgumentException("FormKey expression does not resolve to a string: " +
taskDefinition.getFormKeyExpression().getExpressionText());
}
}
}
handleAssignments(task, execution);
// All properties set, now firing 'create' events
if (Context.getProcessEngineConfiguration().getEventDispatcher().isEnabled()) {
Context.getProcessEngineConfiguration().getEventDispatcher().dispatchEvent(
ActivitiEventBuilder.createEntityEvent(ActivitiEventType.TASK_CREATED, task));
}
task.fireEvent(TaskListener.EVENTNAME_CREATE);
}
public void signal(ActivityExecution execution, String signalName, Object signalData) throws Exception {
if (!((ExecutionEntity)execution).getTasks().isEmpty())
throw new ActivitiException("UserTask should not be signalled before complete");
leave(execution);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
protected void handleAssignments(TaskEntity task, ActivityExecution execution) {
if (taskDefinition.getAssigneeExpression() != null) {
task.setAssignee((String) taskDefinition.getAssigneeExpression().getValue(execution), true, false);
}
if (taskDefinition.getOwnerExpression() != null) {
task.setOwner((String) taskDefinition.getOwnerExpression().getValue(execution));
}
if (!taskDefinition.getCandidateGroupIdExpressions().isEmpty()) {
for (Expression groupIdExpr : taskDefinition.getCandidateGroupIdExpressions()) {
Object value = groupIdExpr.getValue(execution);
if (value instanceof String) {
List<String> candiates = extractCandidates((String) value);
task.addCandidateGroups(candiates);
} else if (value instanceof Collection) {
task.addCandidateGroups((Collection) value);
} else {
throw new ActivitiIllegalArgumentException("Expression did not resolve to a string or collection of strings");
}
}
}
if (!taskDefinition.getCandidateUserIdExpressions().isEmpty()) {
for (Expression userIdExpr : taskDefinition.getCandidateUserIdExpressions()) {
Object value = userIdExpr.getValue(execution);
if (value instanceof String) {
List<String> candiates = extractCandidates((String) value);
task.addCandidateUsers(candiates);
} else if (value instanceof Collection) {
task.addCandidateUsers((Collection) value);
} else {
throw new ActivitiException("Expression did not resolve to a string or collection of strings");
}
}
}
if (!taskDefinition.getCustomUserIdentityLinkExpressions().isEmpty()) {
Map<String, Set<Expression>> identityLinks = taskDefinition.getCustomUserIdentityLinkExpressions();
for (String identityLinkType : identityLinks.keySet()) {
for (Expression idExpression : identityLinks.get(identityLinkType) ) {
Object value = idExpression.getValue(execution);
if (value instanceof String) {
List<String> userIds = extractCandidates((String) value);
for (String userId : userIds) {
task.addUserIdentityLink(userId, identityLinkType);
}
} else if (value instanceof Collection) {
Iterator userIdSet = ((Collection) value).iterator();
while (userIdSet.hasNext()) {
task.addUserIdentityLink((String)userIdSet.next(), identityLinkType);
}
} else {
throw new ActivitiException("Expression did not resolve to a string or collection of strings");
}
}
}
}
if (!taskDefinition.getCustomGroupIdentityLinkExpressions().isEmpty()) {
Map<String, Set<Expression>> identityLinks = taskDefinition.getCustomGroupIdentityLinkExpressions();
for (String identityLinkType : identityLinks.keySet()) {
for (Expression idExpression : identityLinks.get(identityLinkType) ) {
Object value = idExpression.getValue(execution);
if (value instanceof String) {
List<String> groupIds = extractCandidates((String) value);
for (String groupId : groupIds) {
task.addGroupIdentityLink(groupId, identityLinkType);
}
} else if (value instanceof Collection) {
Iterator groupIdSet = ((Collection) value).iterator();
while (groupIdSet.hasNext()) {
task.addGroupIdentityLink((String)groupIdSet.next(), identityLinkType);
}
} else {
throw new ActivitiException("Expression did not resolve to a string or collection of strings");
}
}
}
}
}
/**
* Extract a candidate list from a string.
*
* @param str
* @return
*/
protected List<String> extractCandidates(String str) {
return Arrays.asList(str.split("[\\s]*,[\\s]*"));
}
// getters and setters //////////////////////////////////////////////////////
public TaskDefinition getTaskDefinition() {
return taskDefinition;
}
}