org.xml.sax.DTDHandler Maven / Gradle / Ivy

/*
 * Portions Copyright  2000-2008 Sun Microsystems, Inc. All Rights
 * Reserved.  Use is subject to license terms.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 * 
 * This program 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 version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

// DTDHandler.java - SAX DTD handler.
// http://www.saxproject.org
// Written by David Megginson
// No warranty; no copyright -- use this as you will.

package org.xml.sax;

/**
 * Receive notification of basic DTD-related events.
 *
 * If a SAX application needs information about notations and
 * unparsed entities, then the application implements this 
 * interface and registers an instance with the SAX parser using 
 * the parser's setDTDHandler method.  The parser uses the 
 * instance to report notation and unparsed entity declarations to 
 * the application.
 *
 * Note that this interface includes only those DTD events that
 * the XML recommendation requires processors to report:
 * notation and unparsed entity declarations.
 *
 * The SAX parser may report these events in any order, regardless
 * of the order in which the notations and unparsed entities were
 * declared; however, all DTD events must be reported after the
 * document handler's startDocument event, and before the first
 * startElement event.
 *
 * It is up to the application to store the information for 
 * future use (perhaps in a hash table or object tree).
 * If the application encounters attributes of type "NOTATION",
 * "ENTITY", or "ENTITIES", it can use the information that it
 * obtained through this interface to find the entity and/or
 * notation corresponding with the attribute value.
 *
 * @since SAX 1.0
 * @author David Megginson
 * @see org.xml.sax.XMLReader#setDTDHandler
 */
public interface DTDHandler
{

    /**
     * Receive notification of a notation declaration event.
     *
     * It is up to the application to record the notation for later
     * reference, if necessary;
     * notations may appear as attribute values and in unparsed entity
     * declarations, and are sometime used with processing instruction
     * target names.
     *
     * At least one of publicId and systemId must be non-null.
     * If a system identifier is present, and it is a URL, the SAX
     * parser must resolve it fully before passing it to the
     * application through this event.
     *
     * There is no guarantee that the notation declaration will be
     * reported before any unparsed entities that use it.
     *
     * @param name The notation name.
     * @param publicId The notation's public identifier, or null if
     *        none was given.
     * @param systemId The notation's system identifier, or null if
     *        none was given.
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     * @see #unparsedEntityDecl
     * @see org.xml.sax.Attributes
     */
    public abstract void notationDecl (String name, String publicId, String systemId)
        throws SAXException;


    /**
     * Receive notification of an unparsed entity declaration event.
     *
     * Note that the notation name corresponds to a notation
     * reported by the {@link #notationDecl notationDecl} event.  
     * It is up to the application to record the entity for later 
     * reference, if necessary;
     * unparsed entities may appear as attribute values. 
     * 
     *
     * If the system identifier is a URL, the parser must resolve it
     * fully before passing it to the application.
     *
     * @exception org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     * @param name The unparsed entity's name.
     * @param publicId The entity's public identifier, or null if none
     *        was given.
     * @param systemId The entity's system identifier.
     * @param notationName The name of the associated notation.
     * @see #notationDecl
     * @see org.xml.sax.Attributes
     */
    public abstract void unparsedEntityDecl (String name,
        String publicId, String systemId, String notationName)
        throws SAXException;

}

// end of DTDHandler.java