/**
 * Copyright 1996-2014 FoxBPM ORG.
 *
 * 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.
 * 
 * @author kenshin
 * @author ych
 */
package org.foxbpm.engine.impl.expression;

import org.foxbpm.engine.impl.Context;
import org.foxbpm.engine.impl.entity.ProcessDefinitionEntity;
import org.foxbpm.engine.impl.util.StringUtil;
import org.foxbpm.kernel.runtime.FlowNodeExecutionContext;
import org.foxbpm.kernel.runtime.ListenerExecutionContext;

public class ExpressionMgmt {

	/**
	 * 
	 * execute(根据环境变量执行连接器脚本)
	 * 
	 * @param scriptText
	 * @param executionContext
	 * @return
	 */
	public static Object execute(String scriptText,
			ListenerExecutionContext executionContext) {
		if (executionContext != null) {
			setVariable("listenerExecutionContext", executionContext);
		}
		return Context.getAbstractScriptLanguageMgmt().execute(scriptText,(FlowNodeExecutionContext)executionContext);

	}

	public static Object execute(String scriptText,FlowNodeExecutionContext executionContext) throws Exception {
		if(StringUtil.isNotEmpty(scriptText)){
			return Context.getAbstractScriptLanguageMgmt().execute(scriptText,executionContext);
		}
		return null;
		
	}

	public static Object getVariable(String variableName) {
		return Context.getAbstractScriptLanguageMgmt()
				.getVariable(variableName);

	}

	public static void setVariable(String variableName, Object variableObj,
			FlowNodeExecutionContext executionContext) {
		Context.getAbstractScriptLanguageMgmt().setVariable(variableName,
				variableObj, executionContext); 
	}

	public static void setVariable(String variableName, Object variableObj) {
		Context.getAbstractScriptLanguageMgmt().setVariable(variableName,
				variableObj); 
	}

	public static Object execute(String scriptText,
			ProcessDefinitionEntity processDefinition) {
		return Context.getAbstractScriptLanguageMgmt().execute(scriptText,
				processDefinition);
	}
}