// ResolvingXMLReader.java - An XMLReader that performs catalog resolution

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * 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
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 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. The names "Xalan" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
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 * 5. Products derived from this software may not be called "Apache",
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 *
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 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 2001, International
 * Business Machines Corporation., http://www.ibm.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.xml.resolver.tools;

import java.io.IOException;
import java.net.URL;

import org.xml.sax.*;
import org.xml.sax.helpers.XMLFilterImpl;

import javax.xml.parsers.*;

import org.apache.xml.resolver.*;

/**
 * <p>A SAX XMLReader that performs catalog-based entity resolution.</p>
 *
 * <p>This class implements a SAX XMLReader that performs entity resolution
 * using the CatalogResolver. The actual, underlying parser is obtained
 * from a SAXParserFactory.</p>
 * </p>
 *
 * @see CatalogResolver
 * @see org.xml.sax.XMLReader
 *
 * @author Norman Walsh
 * <a href="mailto:Norman.Walsh@Sun.COM">Norman.Walsh@Sun.COM</a>
 *
 * @version 1.0
 */
public class ResolvingXMLReader extends ResolvingXMLFilter {
  /**
   * <p>Construct a new reader from the JAXP factory</p>
   *
   * <p>In order to do its job, a ResolvingXMLReader must in fact be
   * a filter. So the only difference between this code and the filter
   * code is that the constructor builds a new reader.</p>
   */
  public ResolvingXMLReader() {
    super();
    SAXParserFactory spf = SAXParserFactory.newInstance();
    try {
      SAXParser parser = spf.newSAXParser();
      setParent(parser.getXMLReader());
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }

  /**
   * <p>Construct a new reader from the JAXP factory</p>
   *
   * <p>In order to do its job, a ResolvingXMLReader must in fact be
   * a filter. So the only difference between this code and the filter
   * code is that the constructor builds a new reader.</p>
   */
  public ResolvingXMLReader(CatalogManager manager) {
    super(manager);
    SAXParserFactory spf = SAXParserFactory.newInstance();
    try {
      SAXParser parser = spf.newSAXParser();
      setParent(parser.getXMLReader());
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}