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 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 in the LICENSE file that

 * accompanied this code).

 *

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package org.xml.sax;

/**

 * Receive notification of basic DTD-related events.

 *

 * <p>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.</p>

 *

 * <p>Note that this interface includes only those DTD events that

 * the XML recommendation <em>requires</em> processors to report:

 * notation and unparsed entity declarations.</p>

 *

 * <p>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.

 * (If the {@link org.xml.sax.ext.LexicalHandler LexicalHandler} is

 * used, these events must also be reported before the endDTD event.)

 * </p>

 *

 * <p>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.</p>

 *

 * @since 1.4, SAX 1.0

 * @author David Megginson

 * @see org.xml.sax.XMLReader#setDTDHandler

 */

public interface DTDHandler {

    /**

     * Receive notification of a notation declaration event.

     *

     * <p>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.</p>

     *

     * <p>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.</p>

     *

     * <p>There is no guarantee that the notation declaration will be

     * reported before any unparsed entities that use it.</p>

     *

     * @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.

     *

     * <p>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.

     * </p>

     *

     * <p>If the system identifier is a URL, the parser must resolve it

     * fully before passing it to the application.</p>

     *

     * @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