xref: /trunk/main/connectivity/source/inc/dbase/DIndexIter.hxx (revision 914d351e5f5b84e4342a86d6ab8d4aca7308b9bd)

/**************************************************************
 *
 * 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.
 *
 *************************************************************/



#ifndef _CONNECTIVITY_DBASE_INDEXITER_HXX_
#define _CONNECTIVITY_DBASE_INDEXITER_HXX_

#include "file/fcode.hxx"
#include "dbase/DIndex.hxx"
#include "dbase/dindexnode.hxx"

namespace connectivity
{
    namespace dbase
    {
        //==================================================================
        // IndexIterator
        //==================================================================
        class OIndexIterator
        {
        protected:
            file::OBoolOperator*    m_pOperator;
            const file::OOperand*   m_pOperand;
            ODbaseIndex*            m_pIndex;
            ONDXPagePtr             m_aRoot,
                                    m_aCurLeaf;
            sal_uInt16                  m_nCurNode;

        protected:
            sal_uIntPtr Find(sal_Bool bFirst);
            sal_uIntPtr GetCompare(sal_Bool bFirst);
            sal_uIntPtr GetLike(sal_Bool bFirst);
            sal_uIntPtr GetNull(sal_Bool bFirst);
            sal_uIntPtr GetNotNull(sal_Bool bFirst);

            ONDXKey* GetFirstKey(ONDXPage* pPage,
                                const file::OOperand& rKey);
            ONDXKey* GetNextKey();
            ODbaseIndex* GetIndex() const {return m_pIndex;}


        public:
            OIndexIterator(ODbaseIndex* pInd,
                            file::OBoolOperator* pOp,
                            const file::OOperand* pOper)
                :m_pOperator(pOp)
                ,m_pOperand(pOper)
                ,m_pIndex(pInd)
                ,m_nCurNode(NODE_NOTFOUND)
            {
                pInd->acquire();
            }

            virtual ~OIndexIterator();
            sal_uIntPtr First();
            sal_uIntPtr Next();

        };
    }
}
#endif // _CONNECTIVITY_DBASE_INDEXITER_HXX_