serializerfactory.java

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/*
 * 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
 *    [e-mail].
 *
 * 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 com.caucho.burlap.io.BurlapRemoteObject;

import java.io.*;
import java.math.BigDecimal;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.management.*;

/**
 * Factory for returning serialization methods.
 */
public class SerializerFactory extends AbstractSerializerFactory
{
  private static final Logger log
    = Logger.getLogger(SerializerFactory.class.getName());

  private static Deserializer OBJECT_DESERIALIZER
    = new BasicDeserializer(BasicDeserializer.OBJECT);
  
  private static HashMap _staticSerializerMap;
  private static HashMap _staticDeserializerMap;
  private static HashMap _staticTypeMap;

  protected Serializer _defaultSerializer;

  // Additional factories
  protected ArrayList _factories = new ArrayList();
  
  protected CollectionSerializer _collectionSerializer;
  protected MapSerializer _mapSerializer;
  
  private Deserializer _hashMapDeserializer;
  private Deserializer _arrayListDeserializer;
  private HashMap _cachedSerializerMap;
  private HashMap _cachedDeserializerMap;
  private HashMap _cachedTypeDeserializerMap;

  private boolean _isAllowNonSerializable;

  /**
   * Set true if the collection serializer should send the java type.
   */
  public void setSendCollectionType(boolean isSendType)
  {
    if (_collectionSerializer == null)
      _collectionSerializer = new CollectionSerializer();

    _collectionSerializer.setSendJavaType(isSendType);
    
    if (_mapSerializer == null)
      _mapSerializer = new MapSerializer();

    _mapSerializer.setSendJavaType(isSendType);
  }

  /**
   * Adds a factory.
   */
  public void addFactory(AbstractSerializerFactory factory)
  {
    _factories.add(factory);
  }

  /**
   * If true, non-serializable objects are allowed.
   */
  public void setAllowNonSerializable(boolean allow)
  {
    _isAllowNonSerializable = allow;
  }

  /**
   * If true, non-serializable objects are allowed.
   */
  public boolean isAllowNonSerializable()
  {
    return _isAllowNonSerializable;
  }

  /**
   * Returns the serializer for a class.
   *
   * @param cl the class of the object that needs to be serialized.
   *
   * @return a serializer object for the serialization.
   */
  public Serializer getSerializer(Class cl)
    throws HessianProtocolException
  {
    Serializer serializer;

    serializer = (Serializer) _staticSerializerMap.get(cl);
    if (serializer != null)
      return serializer;

    if (_cachedSerializerMap != null) {
      synchronized (_cachedSerializerMap) {
	serializer = (Serializer) _cachedSerializerMap.get(cl);
      }
      
      if (serializer != null)
	return serializer;
    }

    for (int i = 0;
	 serializer == null && _factories != null && i < _factories.size();
	 i++) {
      AbstractSerializerFactory factory;

      factory = (AbstractSerializerFactory) _factories.get(i);

      serializer = factory.getSerializer(cl);
    }

    if (serializer != null) {
    }

    else if (JavaSerializer.getWriteReplace(cl) != null)
      serializer = new JavaSerializer(cl);

    else if (HessianRemoteObject.class.isAssignableFrom(cl))
      serializer = new RemoteSerializer();

    else if (BurlapRemoteObject.class.isAssignableFrom(cl))
      serializer = new RemoteSerializer();

    else if (Map.class.isAssignableFrom(cl)) {
      if (_mapSerializer == null)
	_mapSerializer = new MapSerializer();
      
      serializer = _mapSerializer;
    }
    else if (Collection.class.isAssignableFrom(cl)) {
      if (_collectionSerializer == null) {
	_collectionSerializer = new CollectionSerializer();
      }

      serializer = _collectionSerializer;
    }

    else if (cl.isArray())
      serializer = new ArraySerializer();

    else if (Throwable.class.isAssignableFrom(cl))
      serializer = new ThrowableSerializer(cl);

    else if (InputStream.class.isAssignableFrom(cl))
      serializer = new InputStreamSerializer();

    else if (Iterator.class.isAssignableFrom(cl))
      serializer = IteratorSerializer.create();

    else if (Enumeration.class.isAssignableFrom(cl))
      serializer = EnumerationSerializer.create();
    
    else if (Calendar.class.isAssignableFrom(cl))
      serializer = CalendarSerializer.create();
    
    else if (Locale.class.isAssignableFrom(cl))
      serializer = LocaleSerializer.create();
    
    else if (Enum.class.isAssignableFrom(cl))
      serializer = new EnumSerializer(cl);

    if (serializer == null)
      serializer = getDefaultSerializer(cl);

    if (_cachedSerializerMap == null)
      _cachedSerializerMap = new HashMap(8);

    synchronized (_cachedSerializerMap) {
      _cachedSerializerMap.put(cl, serializer);
    }

    return serializer;
  }

  /**
   * Returns the default serializer for a class that isn't matched
   * directly.  Application can override this method to produce
   * bean-style serialization instead of field serialization.
   *
   * @param cl the class of the object that needs to be serialized.
   *
   * @return a serializer object for the serialization.
   */
  protected Serializer getDefaultSerializer(Class cl)
  {
    if (_defaultSerializer != null)
      return _defaultSerializer;

    if (! Serializable.class.isAssignableFrom(cl)
	&& ! _isAllowNonSerializable) {
      throw new IllegalStateException("Serialized class " + cl.getName() + " must implement java.io.Serializable");
    }

    return new JavaSerializer(cl);
  }
  
  /**
   * Returns the deserializer for a class.
   *
   * @param cl the class of the object that needs to be deserialized.
   *
   * @return a deserializer object for the serialization.
   */
  public Deserializer getDeserializer(Class cl)
    throws HessianProtocolException
  {
    Deserializer deserializer;

    deserializer = (Deserializer) _staticDeserializerMap.get(cl);
    if (deserializer != null)
      return deserializer;

    if (_cachedDeserializerMap != null) {
      synchronized (_cachedDeserializerMap) {
	deserializer = (Deserializer) _cachedDeserializerMap.get(cl);
      }
      
      if (deserializer != null)
	return deserializer;
    }


    for (int i = 0;
	 deserializer == null && _factories != null && i < _factories.size();
	 i++) {
      AbstractSerializerFactory factory;
      factory = (AbstractSerializerFactory) _factories.get(i);

      deserializer = factory.getDeserializer(cl);
    }

    if (deserializer != null) {
    }

    else if (Collection.class.isAssignableFrom(cl))
      deserializer = new CollectionDeserializer(cl);

    else if (Map.class.isAssignableFrom(cl))
      deserializer = new MapDeserializer(cl);
    
    else if (cl.isInterface())
      deserializer = new ObjectDeserializer(cl);

    else if (cl.isArray())
      deserializer = new ArrayDeserializer(cl.getComponentType());

    else if (Enumeration.class.isAssignableFrom(cl))
      deserializer = EnumerationDeserializer.create();

    else if (Enum.class.isAssignableFrom(cl))
      deserializer = new EnumDeserializer(cl);
    
    else
      deserializer = getDefaultDeserializer(cl);

    if (_cachedDeserializerMap == null)
      _cachedDeserializerMap = new HashMap(8);

    synchronized (_cachedDeserializerMap) {
      _cachedDeserializerMap.put(cl, deserializer);
    }