#ifndef DOMImplementationRegistry_HEADER_GUARD_

#define DOMImplementationRegistry_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: DOMImplementationRegistry.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

/**

  * This class holds the list of registered DOMImplementations.  Implementation

  * or application can register DOMImplementationSource to the registry, and

  * then can query DOMImplementation based on a list of requested features.

  *

  * <p>This provides an application with an implementation independent starting

  * point.

  *

  * @see DOMImplementation

  * @see DOMImplementationSource

  * @since DOM Level 3

  */

#include <xercesc/util/XercesDefs.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class DOMImplementation;

class DOMImplementationSource;

class CDOM_EXPORT DOMImplementationRegistry

{

public:

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

    //  Static DOMImplementationRegistry interface

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

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

    //@{

    /**

     * Return the first registered implementation that has the desired features,

     * or null if none is found.

     *

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

     *

     * @param features A string that specifies which features are required.

     *                 This is a space separated list in which each feature is

     *                 specified by its name optionally followed by a space

     *                 and a version number.

     *                 This is something like: "XML 1.0 Traversal 2.0"

     * @return An implementation that has the desired features, or

     *   <code>null</code> if this source has none.

     * @since DOM Level 3

     */

    static DOMImplementation* getDOMImplementation(const XMLCh* features);

    /**

     * Register an implementation.

     *

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

     *

     * @param source   A DOMImplementation Source object to be added to the registry.

     *                 The registry does NOT adopt the source object.  Users still own it.

     * @since DOM Level 3

     */

    static void addSource(DOMImplementationSource* source);

    //@}

private:

    DOMImplementationRegistry();

};

XERCES_CPP_NAMESPACE_END

#endif