content: /*
   * Copyright (c) 2001-2008 Caucho Technology, Inc.  All rights reserved.
   *
   * The Apache Software License, Version 1.1
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Caucho Technology (http://www.caucho.com/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
   *    endorse or promote products derived from this software without prior
   *    written permission. For written permission, please contact
   *    info@caucho.com.
   *
   * 5. Products derived from this software may not be called "Resin"
   *    nor may "Resin" appear in their names without prior written
   *    permission of Caucho Technology.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
   * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * @author Scott Ferguson
   */
  
  package com.caucho.hessian.io;
  
  import java.lang.annotation.Annotation;
  import java.lang.reflect.InvocationHandler;
  import java.lang.reflect.Method;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Proxy for a java annotation for known object types.
   */
  public class AnnotationInvocationHandler implements InvocationHandler {
    private Class _annType;
    private HashMap<String,Object> _valueMap;
  
    public AnnotationInvocationHandler(Class annType,
                                       HashMap<String,Object> valueMap)
    {
      _annType = annType;
      _valueMap = valueMap;
    }
  
    @Override
    public Object invoke(Object proxy, Method method, Object []args)
      throws Throwable
    {
      String name = method.getName();
  
      boolean zeroArgs = args == null || args.length == 0;
      
      if (name.equals("annotationType") && zeroArgs)
        return _annType;
      else if (name.equals("toString") && zeroArgs)
        return toString();
      else if (name.equals("hashCode") && zeroArgs)
        return doHashCode();
      else if (name.equals("equals") && ! zeroArgs && args.length == 1)
        return doEquals(args[0]);
      else if (! zeroArgs)
        return null;
  
  
      return _valueMap.get(method.getName());
    }
    
    public int doHashCode()
    {
      return 13;
    }
    
    public boolean doEquals(Object value)
    {
      if (! (value instanceof Annotation))
        return false;
      
      Annotation ann = (Annotation) value;
      
      if (! _annType.equals(ann.annotationType()))
        return false;
      
      return true;
    }
  
    public String toString()
    {
      StringBuilder sb = new StringBuilder();
      
      sb.append("@");
      sb.append(_annType.getName());
      sb.append("[");
  
      boolean isFirst = true;
      for (Map.Entry entry : _valueMap.entrySet()) {
        if (! isFirst)
          sb.append(", ");
        isFirst = false;
  
        sb.append(entry.getKey());
        sb.append("=");
  
        if (entry.getValue() instanceof String)
          sb.append('"').append(entry.getValue()).append('"');
        else
          sb.append(entry.getValue());
      }
      sb.append("]");
  
      return sb.toString();
    }
  }
  