/*
 * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.soap.marshall;
import javax.xml.namespace.*;
import javax.xml.stream.*;
import java.util.*;

import java.lang.reflect.*;
import java.io.*;

import com.caucho.vfs.WriteStream;

/**
 * Marshalls data for a string object
 */
public abstract class CDataMarshall extends Marshall {

  protected CDataMarshall()
  {
  }
  
  protected abstract Object deserialize(String in)
    throws IOException, XMLStreamException;

  public Object deserialize(XMLStreamReader in)
      throws IOException, XMLStreamException
  {
      if (in.next() != in.CHARACTERS)
          throw new IOException("expected element to have CDATA");

      return deserialize(in.getText());
  }

  protected abstract String serialize(Object in)
    throws IOException, XMLStreamException;

  public void serialize(WriteStream out, Object obj, QName fieldName)
    throws IOException, XMLStreamException
  {
    out.print('<');
    out.print(fieldName.getLocalPart());

    String nsuri = fieldName.getNamespaceURI();
    if (nsuri != null && !nsuri.equals("")) {
      out.print(" xmlns=\"");
      escapify(nsuri, out);
      out.print("\"");
    }

    out.print('>');

    escapify(serialize(obj), out);

    out.print("</");
    out.print(fieldName.getLocalPart());
    out.print(">");
    
  }

  public static void escapify(String s, WriteStream out)
    throws IOException
  {
    int len = s.length();

    for(int i=0; i<len; i++) {
      char c = s.charAt(i);
      if ((c < 32 || c > 127) || c=='\'' || c=='\"' ||
          c=='<' || c=='>' || c=='&') {
        out.print("&#");
        out.print((int)c);
        out.print(";");
      } else {
        out.print(c);
      }
    }

  }

}


