#ifndef NodeIDMap_HEADER_GUARD_

#define NodeIDMap_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.

 */

//

//  This file is part of the internal implementation of the C++ XML DOM.

//  It should NOT be included or used directly by application programs.

//

//  Applications should include the file <xercesc/dom/deprecated/DOM.hpp> for the entire

//  DOM API, or DOM_*.hpp for individual DOM classes, where the class

//  name is substituded for the *.

//

//

//  Class NodeIDMap is a hash table that is used in the implementation of

//   of DOM_Document::getElementsByID().

//

//  Why Yet Another HashTable implementation?  Becuase it can be significantly

//  smaller when tuned for this exact usage, and the generic RefHashTableOf

//  from the xerces utils project is not a paricularly good fit.

//

#include <xercesc/util/PlatformUtils.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class AttrImpl;

class DOMString;

class NodeIDMap : public XMemory {

public:

    // Create a new hash table, sized to hold "initialSize"

    NodeIDMap(int initialSize,

              MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);

                                   //  Entries.  It will automatically grow if need be.

    virtual ~NodeIDMap();

private:

    NodeIDMap(const NodeIDMap &other);   // No copy, assignement, comparison.

    NodeIDMap &operator = (const NodeIDMap &other);

    bool operator == (const NodeIDMap &other);

public:

    void  add(AttrImpl *attr);       // Add the specified attribute to the table.

    void  remove(AttrImpl *other);   // Remove the specified attribute.

                                           //   Does nothing if the node is not in the table.

    AttrImpl *find(const DOMString &ID);   // Find the attribute node in the table with this ID

private:

    void growTable();

private:

    AttrImpl      **fTable;

    unsigned int  fSizeIndex;              // Index of the current table size in the

                                           //   array of possible table sizes.

	unsigned int  fSize;                   // The current size of the table array

                                           //   (number of slots, not bytes.)

    unsigned int  fNumEntries;             // The number of entries used.

    unsigned int  fMaxEntries;             // The max number of entries to use before

                                           //   growing the table.

    MemoryManager* fMemoryManager;

};

XERCES_CPP_NAMESPACE_END

#endif