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.io.OutputStream;
  import java.lang.reflect.Field;
  import java.lang.reflect.Method;
  import java.lang.reflect.Modifier;
  
  /**
   * Output stream for Hessian requests.
   *
   * <p>HessianOutput is unbuffered, so any client needs to provide
   * its own buffering.
   *
   * <h3>Serialization</h3>
   *
   * <pre>
   * OutputStream os = new FileOutputStream("test.xml");
   * HessianOutput out = new HessianSerializerOutput(os);
   *
   * out.writeObject(obj);
   * os.close();
   * </pre>
   *
   * <h3>Writing an RPC Call</h3>
   *
   * <pre>
   * OutputStream os = ...; // from http connection
   * HessianOutput out = new HessianSerializerOutput(os);
   * String value;
   *
   * out.startCall("hello");  // start hello call
   * out.writeString("arg1"); // write a string argument
   * out.completeCall();      // complete the call
   * </pre>
   */
  public class HessianSerializerOutput extends Hessian2Output {
    /**
     * Creates a new Hessian output stream, initialized with an
     * underlying output stream.
     *
     * @param os the underlying output stream.
     */
    public HessianSerializerOutput(OutputStream os)
    {
      super(os);
    }
  
    /**
     * Creates an uninitialized Hessian output stream.
     */
    public HessianSerializerOutput()
    {
      super(null);
    }
  
    /**
     * Applications which override this can do custom serialization.
     *
     * @param object the object to write.
     */
    public void writeObjectImpl(Object obj)
      throws IOException
    {
      Class cl = obj.getClass();
      
      try {
        Method method = cl.getMethod("writeReplace", new Class[0]);
        Object repl = method.invoke(obj, new Object[0]);
  
        writeObject(repl);
        return;
      } catch (Exception e) {
      }
  
      try {
        writeMapBegin(cl.getName());
        for (; cl != null; cl = cl.getSuperclass()) {
          Field []fields = cl.getDeclaredFields();
          for (int i = 0; i < fields.length; i++) {
            Field field = fields[i];
  
            if (Modifier.isTransient(field.getModifiers()) ||
                Modifier.isStatic(field.getModifiers()))
              continue;
  
            // XXX: could parameterize the handler to only deal with public
            field.setAccessible(true);
        
            writeString(field.getName());
            writeObject(field.get(obj));
          }
        }
        writeMapEnd();
      } catch (IllegalAccessException e) {
        throw new IOExceptionWrapper(e);
      }
    }
  }
  