001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.maven.doxia.sink.impl; 020 021import java.lang.reflect.InvocationHandler; 022import java.lang.reflect.InvocationTargetException; 023import java.lang.reflect.Method; 024import java.util.List; 025 026import org.apache.maven.doxia.sink.Sink; 027 028/** 029 * A proxy for a Sink which captures all event/method names called on it. 030 */ 031public class EventCapturingSinkProxy implements InvocationHandler { 032 033 private final Sink sink; 034 private final List<String> capturedEventNames; 035 036 /** 037 * 038 * @param sink 039 * @param capturedEventNames the list to receive the captured event/method names 040 * @return a new, proxied sink 041 */ 042 public static Sink newInstance(Sink sink, List<String> capturedEventNames) { 043 return (Sink) java.lang.reflect.Proxy.newProxyInstance( 044 sink.getClass().getClassLoader(), 045 new Class<?>[] {Sink.class}, 046 new EventCapturingSinkProxy(sink, capturedEventNames)); 047 } 048 049 private EventCapturingSinkProxy(Sink sink, List<String> capturedEventNames) { 050 this.sink = sink; 051 this.capturedEventNames = capturedEventNames; 052 } 053 054 @Override 055 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 056 Object result; 057 try { 058 capturedEventNames.add(method.getName()); 059 result = method.invoke(sink, args); 060 } catch (InvocationTargetException e) { 061 throw e.getTargetException(); 062 } 063 return result; 064 } 065}