/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 * 

 *      http://www.apache.org/licenses/LICENSE-2.0

 * 

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

/*

 * $Id: DTDHandler.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

#ifndef DTDHANDLER_HPP

#define DTDHANDLER_HPP

#include <xercesc/util/XercesDefs.hpp>

XERCES_CPP_NAMESPACE_BEGIN

/**

  * 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>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.</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>

  *

  * <p>The HandlerBase class provides a default implementation

  * of this interface, which simply ignores the events.</p>

  *

  * @see Parser#setDTDHandler

  * @see HandlerBase#HandlerBase

  */

class SAX_EXPORT DTDHandler

{

public:

    /** @name Constructors and Destructor */

    //@{

    /** Default Constructor */

    DTDHandler()

    {

    }

    /** Destructor */

    virtual ~DTDHandler()

    {

    }

    //@}

    /** @name The DTD handler interface */

    //@{

  /**

    * Receive notification of a notation declaration event.

    *

    * <p>It is up to the application to record the notation for later

    * reference, if necessary.</p>

    *

    * <p>If a system identifier is present, and it is a URL, the SAX

    * parser must resolve it fully before passing it to the

    * application.</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 SAXException Any SAX exception, possibly

    *            wrapping another exception.

    * @see #unparsedEntityDecl

    * @see AttributeList#AttributeList

    */

	virtual void notationDecl

    (

        const   XMLCh* const    name

        , const XMLCh* const    publicId

        , const XMLCh* const    systemId

    ) = 0;

  /**

    * Receive notification of an unparsed entity declaration event.

    *

    * <p>Note that the notation name corresponds to a notation

    * reported by the notationDecl() event.  It is up to the

    * application to record the entity for later reference, if

    * necessary.</p>

    *

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

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

    *

    * @exception 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 (it must always

    *        have one).

    * @param notationName The name of the associated notation.

    * @see #notationDecl

    * @see AttributeList#AttributeList

    */

    virtual void unparsedEntityDecl

    (

        const   XMLCh* const    name

        , const XMLCh* const    publicId

        , const XMLCh* const    systemId

        , const XMLCh* const    notationName

    ) = 0;

    /**

    * Reset the DocType object on its reuse

    *

    * <p>This method helps in reseting the DTD object implementational

    * defaults each time the DTD is begun.</p>

    *

    */

    virtual void resetDocType() = 0;

    //@}

private :

    /* Unimplemented constructors and operators */

    /* Copy constructor */

    DTDHandler(const DTDHandler&);

    /* Assignment operator */

    DTDHandler& operator=(const DTDHandler&);

};

XERCES_CPP_NAMESPACE_END

#endif