org.apache.commons.jexl.util.AbstractExecutor Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.commons.jexl.util;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.commons.logging.Log;
/**
* Abstract class that is used to execute an arbitrary
* method that is in introspected. This is the superclass
* for the GetExecutor and PropertyExecutor.
*
* @since 1.0
* @author Jason van Zyl
* @author Geir Magnusson Jr.
* @version $Id: AbstractExecutor.java 584046 2007-10-12 05:14:37Z proyal $
*/
public abstract class AbstractExecutor {
/** The executor instance log. */
protected Log rlog = null;
/**
* Method to be executed.
*/
protected Method method = null;
/**
* Execute method against context.
*
* @param o The owner.
* @return The return value.
* @throws IllegalAccessException Method is inaccessible.
* @throws InvocationTargetException Method body throws an exception.
*/
public abstract Object execute(Object o)
throws IllegalAccessException, InvocationTargetException;
/**
* Tell whether the executor is alive by looking
* at the value of the method.
*
* @return boolean Whether the executor is alive.
*/
public boolean isAlive() {
return (method != null);
}
/**
* Get the method to be executed.
*
* @return Method The method to be executed.
*/
public Method getMethod() {
return method;
}
}