1 package org.apache.velocity.runtime.parser.node; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import org.slf4j.Logger; 23 24 import java.lang.reflect.InvocationTargetException; 25 import java.lang.reflect.Method; 26 27 /** 28 * Abstract class that is used to execute an arbitrary 29 * method that is in introspected. This is the superclass 30 * for the GetExecutor and PropertyExecutor. 31 * 32 * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a> 33 * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> 34 * @version $Id$ 35 */ 36 public abstract class AbstractExecutor 37 { 38 /** */ 39 protected Logger log = null; 40 41 /** 42 * Method to be executed. 43 */ 44 private Method method = null; 45 46 /** 47 * Execute method against context. 48 * @param o 49 * @return The resulting object. 50 * @throws IllegalAccessException 51 * @throws InvocationTargetException 52 */ execute(Object o)53 public abstract Object execute(Object o) 54 throws IllegalAccessException, InvocationTargetException; 55 56 /** 57 * Tell whether the executor is alive by looking 58 * at the value of the method. 59 * 60 * @return True if executor is alive. 61 */ isAlive()62 public boolean isAlive() 63 { 64 return (method != null); 65 } 66 67 /** 68 * @return The current method. 69 */ getMethod()70 public Method getMethod() 71 { 72 return method; 73 } 74 75 /** 76 * @param method 77 * @since 1.5 78 */ setMethod(final Method method)79 protected void setMethod(final Method method) 80 { 81 this.method = method; 82 } 83 } 84