content: /*
   * Copyright (c) 2001-2004 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 "Hessian", "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.io.IOException;
  import java.lang.reflect.Constructor;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.SortedMap;
  import java.util.TreeMap;
  
  /**
   * Deserializing a JDK 1.2 Map.
   */
  public class MapDeserializer extends AbstractMapDeserializer {
    private Class<?> _type;
    private Constructor<?> _ctor;
    
    public MapDeserializer(Class<?> type)
    {
      if (type == null)
        type = HashMap.class;
      
      _type = type;
  
      Constructor<?> []ctors = type.getConstructors();
      for (int i = 0; i < ctors.length; i++) {
        if (ctors[i].getParameterTypes().length == 0)
          _ctor = ctors[i];
      }
  
      if (_ctor == null) {
        try {
          _ctor = HashMap.class.getConstructor(new Class[0]);
        } catch (Exception e) {
          throw new IllegalStateException(e);
        }
      }
    }
    
    public Class<?> getType()
    {
      if (_type != null)
        return _type;
      else
        return HashMap.class;
    }
  
    public Object readMap(AbstractHessianInput in)
      throws IOException
    {
      Map map;
      
      if (_type == null)
        map = new HashMap();
      else if (_type.equals(Map.class))
        map = new HashMap();
      else if (_type.equals(SortedMap.class))
        map = new TreeMap();
      else {
        try {
          map = (Map) _ctor.newInstance();
        } catch (Exception e) {
          throw new IOExceptionWrapper(e);
        }
      }
  
      in.addRef(map);
  
      while (! in.isEnd()) {
        map.put(in.readObject(), in.readObject());
      }
  
      in.readEnd();
  
      return map;
    }
  
    @Override
    public Object readObject(AbstractHessianInput in,
                             Object []fields)
      throws IOException
    {
      String []fieldNames = (String []) fields;
      Map<Object,Object> map = createMap();
        
      int ref = in.addRef(map);
  
      for (int i = 0; i < fieldNames.length; i++) {
        String name = fieldNames[i];
  
        map.put(name, in.readObject());
      }
  
      return map;
    }
  
    private Map createMap()
      throws IOException
    {
      
      if (_type == null)
        return new HashMap();
      else if (_type.equals(Map.class))
        return new HashMap();
      else if (_type.equals(SortedMap.class))
        return new TreeMap();
      else {
        try {
          return (Map) _ctor.newInstance();
        } catch (Exception e) {
          throw new IOExceptionWrapper(e);
        }
      }
    }
  }
  