proxyenhancer.java

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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jbpm.mock;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.List;

import org.jbpm.util.ClassLoaderUtil;

public class ProxyEnhancer {

  public static Object addRecorder(Object o, Class[] interfaces) {
    return Proxy.newProxyInstance(ClassLoaderUtil.getClassLoader(), interfaces, new RecorderHandler(o));
  }
  
  static Method getInvocationsMethod = null;
  static { 
    try {
      getInvocationsMethod = Recorded.class.getDeclaredMethod("getInvocations", null);
    } catch (Exception e) {
      throw new RuntimeException("couldn't get invocations", e);
    }
  }
  
  public static class RecorderHandler implements InvocationHandler {
    Object o;
    List invocations = new ArrayList();
    public RecorderHandler(Object o) {
      this.o = o;
    }
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
      if (method.equals(getInvocationsMethod)) {
        return invocations;
      } else {
        invocations.add(new Invocation(method.getName(), args));
        return method.invoke(o, args);
      }
    }
  }
}