| 1 | package org.apache.velocity.runtime.parser.node; |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2000-2001,2004 The Apache Software Foundation. |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | |
| 20 | import java.lang.reflect.InvocationTargetException; |
| 21 | import java.lang.reflect.Method; |
| 22 | |
| 23 | import org.apache.velocity.runtime.RuntimeLogger; |
| 24 | |
| 25 | /** |
| 26 | * Abstract class that is used to execute an arbitrary |
| 27 | * method that is in introspected. This is the superclass |
| 28 | * for the GetExecutor and PropertyExecutor. |
| 29 | * |
| 30 | * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a> |
| 31 | * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> |
| 32 | * @version $Id: AbstractExecutor.java,v 1.12.4.1 2004/03/03 23:22:59 geirm Exp $ |
| 33 | */ |
| 34 | public abstract class AbstractExecutor |
| 35 | { |
| 36 | protected RuntimeLogger rlog = null; |
| 37 | |
| 38 | /** |
| 39 | * Method to be executed. |
| 40 | */ |
| 41 | protected Method method = null; |
| 42 | |
| 43 | /** |
| 44 | * Execute method against context. |
| 45 | */ |
| 46 | public abstract Object execute(Object o) |
| 47 | throws IllegalAccessException, InvocationTargetException; |
| 48 | |
| 49 | /** |
| 50 | * Tell whether the executor is alive by looking |
| 51 | * at the value of the method. |
| 52 | */ |
| 53 | public boolean isAlive() |
| 54 | { |
| 55 | return (method != null); |
| 56 | } |
| 57 | |
| 58 | public Method getMethod() |
| 59 | { |
| 60 | return method; |
| 61 | } |
| 62 | } |