#ifndef DOMUserDataHandler_HEADER_GUARD_

#define DOMUserDataHandler_HEADER_GUARD_

/*

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

 */

#include <xercesc/util/XercesDefs.hpp>

#include <xercesc/dom/DOMNode.hpp>

XERCES_CPP_NAMESPACE_BEGIN

/**

 * When associating an object to a key on a node using <code>setUserData</code>

 *  the application can provide a handler that gets called when the node the

 * object is associated to is being cloned or imported. This can be used by

 * the application to implement various behaviors regarding the data it

 * associates to the DOM nodes. This interface defines that handler.

 *

 * <p><b>"Experimental - subject to change"</b></p>

 *

 * <p>See also the <a href='http://www.w3.org/2001/07/WD-DOM-Level-3-Core-20010726'>Document Object Model (DOM) Level 3 Core Specification</a>.

 * @since DOM Level 3

 */

class CDOM_EXPORT DOMUserDataHandler {

protected:

    // -----------------------------------------------------------------------

    //  Hidden constructors

    // -----------------------------------------------------------------------

    /** @name Hidden constructors */

    //@{    

    DOMUserDataHandler() {};

    //@}

private:

    // -----------------------------------------------------------------------

    // Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    /** @name Unimplemented constructors and operators */

    //@{

    DOMUserDataHandler(const DOMUserDataHandler &);

    DOMUserDataHandler & operator = (const DOMUserDataHandler &);

    //@}

public:

    // -----------------------------------------------------------------------

    //  All constructors are hidden, just the destructor is available

    // -----------------------------------------------------------------------

    /** @name Destructor */

    //@{

    /**

     * Destructor

     *

     */

    virtual ~DOMUserDataHandler() {};

    //@}

    // -----------------------------------------------------------------------

    //  Class Types

    // -----------------------------------------------------------------------

    /** @name Public Constants */

    //@{

    /**

     * Operation Type

     *

     * <p><code>NODE_CLONED:</code>

     * The node is cloned.</p>

     *

     * <p><code>NODE_IMPORTED</code>

     * The node is imported.</p>

     *

     * <p><code>NODE_DELETED</code>

     * The node is deleted.</p>

     *

     * <p><code>NODE_RENAMED</code>

     * The node is renamed.

     *

     * <p><b>"Experimental - subject to change"</b></p>

     *

     * @since DOM Level 3

     */

    enum DOMOperationType {

        NODE_CLONED               = 1,

        NODE_IMPORTED             = 2,

        NODE_DELETED              = 3,

        NODE_RENAMED              = 4

    };

    //@}

    // -----------------------------------------------------------------------

    //  Virtual DOMUserDataHandler interface

    // -----------------------------------------------------------------------

    /** @name Functions introduced in DOM Level 3 */

    //@{

    /**

     * This method is called whenever the node for which this handler is

     * registered is imported or cloned.

     *

     * <p><b>"Experimental - subject to change"</b></p>

     *

     * @param operation Specifies the type of operation that is being

     *   performed on the node.

     * @param key Specifies the key for which this handler is being called.

     * @param data Specifies the data for which this handler is being called.

     * @param src Specifies the node being cloned, imported, or renamed.

     * @param dst Specifies the node newly created.

     * @since DOM Level 3

     */

    virtual void handle(DOMOperationType operation,

                        const XMLCh* const key,

                        void* data,

                        const DOMNode* src,

                        const DOMNode* dst) = 0;

    //@}

};

XERCES_CPP_NAMESPACE_END

#endif