/*
* Copyright 2007-2009 非也
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation。
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses.
*/
package org.fireflow.engine.taskinstance;
import java.util.List;
import org.fireflow.engine.EngineException;
import org.fireflow.engine.IProcessInstance;
import org.fireflow.engine.ITaskInstance;
import org.fireflow.engine.IWorkItem;
import org.fireflow.engine.IWorkflowSession;
import org.fireflow.engine.RuntimeContext;
import org.fireflow.engine.beanfactory.IBeanFactory;
import org.fireflow.engine.impl.WorkflowSession;
import org.fireflow.engine.persistence.IPersistenceService;
import org.fireflow.kernel.KernelException;
import org.fireflow.model.FormTask;
import org.fireflow.model.Task;
import org.fireflow.model.resource.Participant;
/**
*
* @author 非也
* @version 1.0
* Created on Mar 21, 2009
*/
public class DefaultFormTaskInstanceRunner implements ITaskInstanceRunner {
/* (non-Javadoc)
* @see org.fireflow.engine.taskinstance.ITaskInstanceRunner#run(org.fireflow.engine.IWorkflowSession, org.fireflow.engine.RuntimeContext, org.fireflow.engine.IProcessInstance, org.fireflow.engine.ITaskInstance)
*/
public void run(IWorkflowSession currentSession, RuntimeContext runtimeContext, IProcessInstance processInstance,
ITaskInstance taskInstance) throws EngineException, KernelException {
if (!Task.FORM.equals(taskInstance.getTaskType())){
throw new EngineException(processInstance,
taskInstance.getActivity(),
"DefaultFormTaskInstanceRunner：TaskInstance的任务类型错误，只能为FORM类型");
}
DynamicAssignmentHandler dynamicAssignmentHandler = ((WorkflowSession)currentSession).consumeCurrentDynamicAssignmentHandler();
FormTask task = (FormTask)taskInstance.getTask();
Participant performer = task.getPerformer();//获取到form的执行者
if (performer == null || performer.getAssignmentHandler().trim().equals("")) {
throw new EngineException(processInstance,
taskInstance.getActivity(),
"流程定义错误，Form类型的 task必须指定performer及其AssignmentHandler");
}
assign(currentSession,processInstance,runtimeContext,taskInstance, task, performer, dynamicAssignmentHandler);
}
/**
* 分配， 按照当前任务的参与者插入工单
* @param currentSession
* @param processInstance
* @param runtimeContext
* @param taskInstance
* @param formTask
* @param part
* @param dynamicAssignmentHandler
* @throws EngineException
* @throws KernelException
*/
protected void assign(IWorkflowSession currentSession,IProcessInstance processInstance, RuntimeContext runtimeContext,ITaskInstance taskInstance, FormTask formTask, Participant part, DynamicAssignmentHandler dynamicAssignmentHandler) throws EngineException, KernelException {
//如果有指定的Actor，则按照指定的Actor分配任务
if (dynamicAssignmentHandler != null) {
dynamicAssignmentHandler.assign((IAssignable) taskInstance, part.getName());
} else {
IPersistenceService persistenceService = runtimeContext.getPersistenceService();
//从数据库中查询任务信息
List<ITaskInstance> taskInstanceList = persistenceService.findTaskInstancesForProcessInstance(taskInstance.getProcessInstanceId(), taskInstance.getActivityId());
ITaskInstance theLastCompletedTaskInstance = null;
for (int i=0;taskInstanceList!=null && i<taskInstanceList.size();i++){
ITaskInstance tmp = taskInstanceList.get(i);
if (tmp.getId().equals(taskInstance.getId()))continue;
if (!tmp.getTaskId().equals(taskInstance.getTaskId()))continue;
if (tmp.getState().intValue()!=ITaskInstance.COMPLETED)continue;
if ( theLastCompletedTaskInstance==null){
theLastCompletedTaskInstance = tmp;
}else{
if (theLastCompletedTaskInstance.getStepNumber().intValue()<tmp.getStepNumber().intValue()){
theLastCompletedTaskInstance=tmp;
}
}
}
//如果是循环且LoopStrategy==REDO，则分配个上次完成该工作的操作员
if (theLastCompletedTaskInstance!=null && (FormTask.REDO.equals(formTask.getLoopStrategy()) || currentSession.isInWithdrawOrRejectOperation())) {
List<IWorkItem> workItemList = persistenceService.findCompletedWorkItemsForTaskInstance(theLastCompletedTaskInstance.getId());
ITaskInstanceManager taskInstanceMgr = runtimeContext.getTaskInstanceManager();
for (int k = 0; k < workItemList.size(); k++) {
IWorkItem completedWorkItem = workItemList.get(k);
IWorkItem newFromWorkItem = taskInstanceMgr.createWorkItem(currentSession,processInstance,taskInstance, completedWorkItem.getActorId());
newFromWorkItem.claim(); //并自动签收
}
} else {
IBeanFactory beanFactory = runtimeContext.getBeanFactory();
//从spring中获取到对应任务的Performer，创建工单
IAssignmentHandler assignmentHandler = (IAssignmentHandler) beanFactory.getBean(part.getAssignmentHandler());
//modified by wangmj 20090904
assignmentHandler.assign((IAssignable) taskInstance, part.getName());
}
}
}
}