saxparser.java

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/*
 * $Id: SAXParser.java,v 1.1 2004/02/15 11:06:43 epr Exp $
 * Copyright (C) 2001 Andrew Selkirk
 * Copyright (C) 2001 David Brownell
 * 
 * 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
 *
 * As a special exception, if you link this library with other files to
 * produce an executable, this library does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * This exception does not however invalidate any other reasons why the
 * executable file might be covered by the GNU General Public License. 
 */

package javax.xml.parsers;

// Imports
import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.xml.sax.HandlerBase;
import org.xml.sax.InputSource;
import org.xml.sax.Parser;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

/**
 * Wraps a SAX2 (or SAX1) parser.
 *
 * <p>Note that parsing with methods on this interface requires use of one
 * of the optional SAX base classes.  It's usually preferable to use the
 * SAX parser APIs directly.  SAX gives much more flexibility about how
 * application classes are organized, and about how the document entity is
 * packaged for delivery to the parser.  And JAXP doesn't otherwise provide
 * access to the SAX2 extension handlers for lexical or declaration events.
 *
 * @author	Andrew Selkirk
 * @author	David Brownell
 * @version	1.0
 */
public abstract class SAXParser
{
	/** Only subclasses may use the constructor. */
	protected SAXParser() { }


	//-------------------------------------------------------------
	// Methods ----------------------------------------------------
	//-------------------------------------------------------------

	public abstract void setProperty (String id, Object value) 
		throws SAXNotRecognizedException, SAXNotSupportedException;

	public abstract Object getProperty (String id) 
		throws SAXNotRecognizedException, SAXNotSupportedException;

	/**
	 * Parse using (deprecated) SAX1 style handlers,
	 * and a byte stream (with no URI).
	 * Avoid using this API, since relative URIs in the document need
	 * to be resolved against the document entity's URI, and good
	 * diagnostics also need that URI.
	 */
	public void parse(InputStream stream, HandlerBase handler) 
	throws SAXException, IOException
	    { parse (new InputSource (stream), handler); }

	/**
	 * Parse using (deprecated) SAX1 style handlers,
	 * and a byte stream with a specified URI.
	 */
	public void parse (
		InputStream stream,
		HandlerBase handler,
		String systemID
	) throws SAXException, IOException
	{
		InputSource	source;

		// Prepare Source
		source = new InputSource(stream);
		source.setSystemId(systemID);

		parse(source, handler);

	}

	/**
	 * Parse using SAX2 style handlers,
	 * and a byte stream (with no URI).
	 * Avoid using this API, since relative URIs in the document need
	 * to be resolved against the document entity's URI, and good
	 * diagnostics also need that URI.
	 */
	public void parse(InputStream stream, DefaultHandler def) 
	throws SAXException, IOException
	    { parse (new InputSource (stream), def); }

	/**
	 * Parse using SAX2 style handlers,
	 * and a byte stream with a specified URI.
	 */
	public void parse (
		InputStream stream,
		DefaultHandler def,
		String systemID
	) throws SAXException, IOException
	{
		InputSource	source;

		// Prepare Source
		source = new InputSource(stream);
		source.setSystemId(systemID);

		parse(source, def);

	}

	/**
	 * Parse using (deprecated) SAX1 style handlers,
	 * and a URI for the document entity.
	 */
	public void parse(String uri, HandlerBase handler) 
	throws SAXException, IOException
	    { parse (new InputSource (uri), handler); }

	/**
	 * Parse using SAX2 style handlers,
	 * and a URI for the document entity.
	 */
	public void parse(String uri, DefaultHandler def) 
	throws SAXException, IOException
	    { parse (new InputSource (uri), def); }

	/**
	 * Parse using (deprecated) SAX1 style handlers,
	 * turning a file name into the document URI.
	 */
	public void parse(File file, HandlerBase handler) 
	throws SAXException, IOException
	{
		InputSource	in;
		
		in = new InputSource (DocumentBuilder.fileToURL (file));
		parse (in, handler);
	}

	/**
	 * Parse using SAX2 style handlers,
	 * turning a file name into the document URI.
	 */
	public void parse(File file, DefaultHandler def) 
	throws SAXException, IOException
	{
		InputSource	in;
		
		in = new InputSource (DocumentBuilder.fileToURL (file));
		parse (in, def);
	}

	/**
	 * Parse using (deprecated) SAX1 style handlers.
	 */
	public void parse(InputSource source, HandlerBase handler) 
	throws SAXException, IOException
	{
		Parser	parser;

		// Prepare Parser
		parser = getParser();
		parser.setDocumentHandler(handler);
		parser.setDTDHandler(handler);
		parser.setEntityResolver(handler);
		parser.setErrorHandler(handler);

		// Parse
		parser.parse(source);

	}

	/**
	 * Parse using SAX2 style handlers.
	 */
	public void parse(InputSource source, DefaultHandler def) 
	throws SAXException, IOException
	{
		XMLReader	reader;

		// Prepare XML Reader
		reader = getXMLReader();
		reader.setContentHandler(def);
		reader.setDTDHandler(def);
		reader.setEntityResolver(def);
		reader.setErrorHandler(def);

		// NOTE:  this should NOT understand the
		// extension handlers (lexical, decl).

		reader.parse(source);
	}

	/**
	 * Get a (deprecated) SAX1 driver for the underlying parser.
	 */
	public abstract Parser getParser() throws SAXException;

	/**
	 * Get a SAX2 driver for the underlying parser.
	 */
	public abstract XMLReader getXMLReader() throws SAXException;

	public abstract boolean isNamespaceAware();

	public abstract boolean isValidating();
}