/**
 * $Id: SAXTransformerFactory.java,v 1.3 2001/01/26 09:33:09 mode Exp $
 *
 * Copyright (c) 2000-2001 Sun Microsystems, Inc. All Rights Reserved.
 *
 * This software is the confidential and proprietary information of Sun
 * Microsystems, Inc. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with Sun.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
 * THIS SOFTWARE OR ITS DERIVATIVES.
 */
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;
}
