/*
 * DomDocumentBuilder.java
 * Copyright (C) 2004 The Free Software Foundation
 * 
 * This file is part of GNU JAXP, a library.
 *
 * GNU JAXP 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.
 * 
 * GNU JAXP 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.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Linking this library statically or dynamically with other modules is
 * making a combined work based on this library.  Thus, the terms and
 * conditions of the GNU General Public License cover the whole
 * combination.
 *
 * As a special exception, the copyright holders of this library give you
 * permission to link this library with independent modules to produce an
 * executable, regardless of the license terms of these independent
 * modules, and to copy and distribute the resulting executable under
 * terms of your choice, provided that you also meet, for each linked
 * independent module, the terms and conditions of the license of that
 * module.  An independent module is a module which is not derived from
 * or based on this library.  If you modify this library, you may extend
 * this exception to your version of the library, but you are not
 * obliged to do so.  If you do not wish to do so, delete this
 * exception statement from your version. 
 */

package gnu.xml.dom;

import java.io.InputStream;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.DOMConfiguration;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSParser;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * Document builder using the GNU DOM Load &amp; Save implementation.
 *
 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
 */
class DomDocumentBuilder
  extends DocumentBuilder
{

  final DOMImplementation impl;
  final DOMImplementationLS ls;
  final LSParser parser;
  
  DomDocumentBuilder(DOMImplementation impl,
                     DOMImplementationLS ls,
                     LSParser parser)
  {
    this.impl = impl;
    this.ls = ls;
    this.parser = parser;
  }

  public boolean isNamespaceAware()
  {
    DOMConfiguration config = parser.getDomConfig();
    return ((Boolean) config.getParameter("namespaces")).booleanValue();
  }
  
  public boolean isValidating()
  {
    DOMConfiguration config = parser.getDomConfig();
    return ((Boolean) config.getParameter("validating")).booleanValue();
  }

  public boolean isXIncludeAware()
  {
    DOMConfiguration config = parser.getDomConfig();
    return ((Boolean) config.getParameter("xinclude-aware")).booleanValue();
  }

  public void setEntityResolver(EntityResolver resolver)
  {
    DOMConfiguration config = parser.getDomConfig();
    config.setParameter("entity-resolver", resolver);
  }

  public void setErrorHandler(ErrorHandler handler)
  {
    DOMConfiguration config = parser.getDomConfig();
    config.setParameter("error-handler", handler);
  }

  public DOMImplementation getDOMImplementation()
  {
    return impl;
  }
  
  public Document newDocument()
  {
    return impl.createDocument(null, null, null);
  }

  public Document parse(InputStream in)
    throws SAXException, IOException
  {
    LSInput input = ls.createLSInput();
    input.setByteStream(in);
    return parser.parse(input);
  }

  public Document parse(InputStream in, String systemId)
    throws SAXException, IOException
  {
    LSInput input = ls.createLSInput();
    input.setByteStream(in);
    input.setSystemId(systemId);
    return parser.parse(input);
  }

  public Document parse(String systemId)
    throws SAXException, IOException
  {
    return parser.parseURI(systemId);
  }

  public Document parse(InputSource is)
    throws SAXException, IOException
  {
    LSInput input = ls.createLSInput();
    InputStream in = is.getByteStream();
    if (in != null)
      {
        input.setByteStream(in);
      }
    else
      {
        input.setCharacterStream(is.getCharacterStream());
      }
    input.setPublicId(is.getPublicId());
    input.setSystemId(is.getSystemId());
    input.setEncoding(is.getEncoding());
    return parser.parse(input);
  }

}

