/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 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
 *    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 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.
 *
 * 4. The names "Xalan" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * 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 THE APACHE SOFTWARE FOUNDATION 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.
 * ====================================================================
 *
 * 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) 1999, Lotus
 * Development Corporation., http://www.lotus.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
/**
 * $Id: SAXTransformerFactory.java,v 1.8 2000/12/20 04:55:26 sboag Exp $
 */
package javax.xml.transform.sax;

import javax.xml.transform.*;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.XMLReader;
import org.xml.sax.XMLFilter;


/**
 * This class extends TransformerFactory to provide SAX-specific
 * factory methods.  It provides two types of ContentHandlers,
 * one for creating Transformers, the other for creating Templates
 * objects.
 *
 * <p>If an application wants to set the ErrorHandler or EntityResolver
 * for an XMLReader used during a transformation, it should use a URIResolver
 * to return the SAXSource which provides (with getXMLReader) a reference to
 * the XMLReader.</p>
 */
public abstract class SAXTransformerFactory extends TransformerFactory {

    /** If {@link javax.xml.transform.TransformerFactory#getFeature}
     * returns true when passed this value as an argument,
     * the TransformerFactory returned from
     * {@link javax.xml.transform.TransformerFactory#newInstance} may
     * be safely cast to a SAXTransformerFactory.
     */
    public static final String FEATURE =
        "http://javax.xml.transform.sax.SAXTransformerFactory/feature";

    /** If {@link javax.xml.transform.TransformerFactory#getFeature}
     * returns true when passed this value as an argument,
     * the {@link #newXMLFilter(Source src)}
     * and {@link #newXMLFilter(Templates templates)} methods are supported.
     */
    public static final String FEATURE_XMLFILTER =
        "http://javax.xml.transform.sax.SAXTransformerFactory/feature/xmlfilter";

    /**
     * The default constructor is protected on purpose.
     */
    protected SAXTransformerFactory() {}

    /**
     * Get a TransformerHandler object that can process SAX
     * ContentHandler events into a Result, based on the transformation
     * instructions specified by the argument.
     *
     * @param src The Source of the transformation instructions.
     *
     * @return TransformerHandler ready to transform SAX events.
     *
     * @throws TransformerConfigurationException If for some reason the
     * TransformerHandler can not be created.
     */
    public abstract TransformerHandler newTransformerHandler(Source src)
        throws TransformerConfigurationException;

    /**
     * Get a TransformerHandler object that can process SAX
     * ContentHandler events into a Result, based on the Templates argument.
     *
     * @param templates The compiled transformation instructions.
     *
     * @return TransformerHandler ready to transform SAX events.
     *
     * @throws TransformerConfigurationException If for some reason the
     * TransformerHandler can not be created.
     */
    public abstract TransformerHandler newTransformerHandler(
        Templates templates) throws TransformerConfigurationException;

    /**
     * Get a TransformerHandler object that can process SAX
     * ContentHandler events into a Result. The transformation
     * is defined as an identity (or copy) transformation, for example
     * to copy a series of SAX parse events into a DOM tree.
     *
     * @return A non-null reference to a TransformerHandler, that may
     * be used as a ContentHandler for SAX parse events.
     *
     * @throws TransformerConfigurationException If for some reason the
     * TransformerHandler cannot be created.
     */
    public abstract TransformerHandler newTransformerHandler()
        throws TransformerConfigurationException;

    /**
     * Get a TemplatesHandler object that can process SAX
     * ContentHandler events into a Templates object.
     *
     * @return A non-null reference to a TransformerHandler, that may
     * be used as a ContentHandler for SAX parse events.
     *
     * @throws TransformerConfigurationException If for some reason the
     * TemplatesHandler cannot be created.
     */
    public abstract TemplatesHandler newTemplatesHandler()
        throws TransformerConfigurationException;

    /**
     * Create an XMLFilter that uses the given Source as the
     * transformation instructions.
     *
     * @param src The Source of the transformation instructions.
     *
     * @return An XMLFilter object, or null if this feature is not supported.
     *
     * @throws TransformerConfigurationException If for some reason the
     * TemplatesHandler cannot be created.
     */
    public abstract XMLFilter newXMLFilter(Source src)
        throws TransformerConfigurationException;

    /**
     * Create an XMLFilter, based on the Templates argument..
     *
     * @param templates The compiled transformation instructions.
     *
     * @return An XMLFilter object, or null if this feature is not supported.
     *
     * @throws TransformerConfigurationException If for some reason the
     * TemplatesHandler cannot be created.
     */
    public abstract XMLFilter newXMLFilter(Templates templates)
        throws TransformerConfigurationException;
}