/**
* Copyright 2007-2010 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.pdl.bpel.structure;
import java.util.Map;
import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import javax.script.SimpleScriptContext;
import org.fireflow.client.WorkflowSession;
import org.fireflow.client.impl.WorkflowSessionLocalImpl;
import org.fireflow.engine.context.RuntimeContext;
import org.fireflow.engine.modules.script.ScriptEngineHelper;
import org.fireflow.model.data.Expression;
import org.fireflow.model.data.impl.ExpressionImpl;
import org.fireflow.pdl.bpel.BpelActivity;
import org.fireflow.pvm.kernel.Token;
import org.fireflow.pvm.pdllogic.BusinessStatus;
import org.fireflow.pvm.pdllogic.ContinueDirection;
import org.fireflow.pvm.pdllogic.ExecuteResult;
/**
* @author 非也
* @version 2.0
*/
public class While extends StructureActivity {
public While(String name,String condition,BpelActivity bpelActivity){
super(name);
bpelActivity.setParent(this);
ExpressionImpl exp = new ExpressionImpl();
exp.setLanguage("JEXL");
exp.setBody(condition);
Child childActivity = new Child(exp,bpelActivity);
this.addChild(childActivity);
}
/* (non-Javadoc)
* @see org.fireflow.pvm.pdllogic.WorkflowBehavior#execute(org.fireflow.engine.WorkflowSession, org.fireflow.pvm.kernel.Token, java.lang.Object)
*/
public ExecuteResult execute(WorkflowSession session, Token token,
Object workflowElement) {
if (this.getChildren()==null || this.getChildren().size()==0){
ExecuteResult result = new ExecuteResult();
result.setStatus(BusinessStatus.COMPLETED);
return result;
}else{
Child child = this.getChildren().get(0);
Expression exp = child.getConditionExpression();
RuntimeContext ctx = ((WorkflowSessionLocalImpl)session).getRuntimeContext();
// VariableService varService = ctx.getEngineModule(VariableService.class, token.getProcessType());
// Map<String,Variable> vars = varService.getVariables(token.getProcessType(), token.getProcessInstanceId());
//
// Map<String,Object> varValues = new HashMap<String,Object>();
// if (vars!=null){
// Iterator<Entry<String,Variable>> it = vars.entrySet().iterator();
// while(it.hasNext()){
// Entry<String,Variable> entry = it.next();
// varValues.put(entry.getKey(), entry.getValue().getVariableValue());
// }
// }
//
//变量环境，包含流程变量和流程系统常量
// Map<String,Object> fireflowVariableContext = new HashMap<String,Object>();
// fireflowVariableContext.putAll(varValues);
// fireflowVariableContext.putAll("<系统常量>");
// ConditionResolver resolver = ctx.getEngineModule(ConditionResolver.class,BpelConstants.PROCESS_TYPE);
// boolean b = resolver.resolveBooleanExpression(session, exp, fireflowVariableContext);
Map<String, Object> fireflowVariableContext = ScriptEngineHelper
.fulfillScriptContext(session, ctx,
((WorkflowSessionLocalImpl)session).getCurrentProcessInstance(),
((WorkflowSessionLocalImpl)session).getCurrentActivityInstance());
boolean b = false;
Object obj;
obj = ScriptEngineHelper.evaluateExpression(ctx, exp,
fireflowVariableContext);
if (obj instanceof Boolean) {
b = ((Boolean) obj).booleanValue();
}
if (b){
this.executeChildActivity(session, token, child.getChildBpelActivity());
ExecuteResult result = new ExecuteResult();
result.setStatus(BusinessStatus.RUNNING);
return result;
}else{
ExecuteResult result = new ExecuteResult();
result.setStatus(BusinessStatus.COMPLETED);
return result;
}
}
}
@Override
public ContinueDirection continueOn(WorkflowSession session, Token token,
Object workflowElement) {
if (this.getChildren()==null || this.getChildren().size()==0){
int level = getLevel();
for (int i = 0; i < (level + 1); i++) {
System.out.print(" ");// 打印空格
}
System.out.println(this.getName() + " completed!");
return ContinueDirection.closeMe();
}else{
Child child = this.getChildren().get(0);
Expression exp = child.getConditionExpression();
RuntimeContext ctx = ((WorkflowSessionLocalImpl)session).getRuntimeContext();
// VariableService varService = ctx.getEngineModule(VariableService.class, token.getProcessType());
// Map<String,Variable> vars = varService.getVariables(token.getProcessType(), token.getProcessInstanceId());
//
// Map<String,Object> varValues = new HashMap<String,Object>();
// if (vars!=null){
// Iterator<Entry<String,Variable>> it = vars.entrySet().iterator();
// while(it.hasNext()){
// Entry<String,Variable> entry = it.next();
// varValues.put(entry.getKey(), entry.getValue().getVariableValue());
// }
// }
//变量环境，包含流程变量和流程系统常量
// Map<String,Object> fireflowVariableContext = new HashMap<String,Object>();
// fireflowVariableContext.putAll(varValues);
// fireflowVariableContext.putAll("<系统常量>");
Map<String,Object> fireflowVariableContext = ScriptEngineHelper.fulfillScriptContext(session, ctx,
((WorkflowSessionLocalImpl)session).getCurrentProcessInstance(),
((WorkflowSessionLocalImpl)session).getCurrentActivityInstance());
// ConditionResolver resolver = ctx.getEngineModule(ConditionResolver.class,BpelConstants.PROCESS_TYPE);
// boolean b = resolver.resolveBooleanExpression(session, exp, fireflowVariableContext);
boolean b = false;
Object obj;
obj = ScriptEngineHelper.evaluateExpression(ctx, exp,
fireflowVariableContext);
if (obj instanceof Boolean) {
b = ((Boolean) obj).booleanValue();
}
if (b){
return ContinueDirection.runAgain();
}else{
int level = getLevel();
for (int i = 0; i < (level + 1); i++) {
System.out.print(" ");// 打印空格
}
System.out.println(this.getName() + " completed!");
return ContinueDirection.closeMe();
}
}
}
}