LcsClusterAccessBase.h

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/*
// $Id: //open/dev/fennel/lucidera/colstore/LcsClusterAccessBase.h#7 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2005-2009 LucidEra, Inc.
// Copyright (C) 2005-2009 The Eigenbase Project
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 of the License, or (at your option)
// any later version approved by The Eigenbase Project.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef Fennel_LcsClusterAccessBase_Included
#define Fennel_LcsClusterAccessBase_Included

#include "fennel/tuple/TupleData.h"
#include "fennel/lucidera/colstore/LcsClusterNode.h"
#include "fennel/btree/BTreeDescriptor.h"

FENNEL_BEGIN_NAMESPACE

class FENNEL_LCS_EXPORT LcsClusterAccessBase
    : public boost::noncopyable
{
protected:
    TupleData bTreeTupleData;

    SegmentAccessor segmentAccessor;

    ClusterPageLock clusterLock;

    PageId clusterPageId;

    LcsRid bTreeRid;

    uint nClusterCols;

    uint16_t *lastVal;

    uint16_t *firstVal;

    uint *nVal;

    uint16_t *delta;

    LcsRid readRid();

    PageId readClusterPageId();

    void setHdrOffsets(PConstLcsClusterNode pHdr);

public:
    explicit LcsClusterAccessBase(BTreeDescriptor const &treeDescriptor);

    uint getNumClusterCols()
    {
        return nClusterCols;
    }

    void setNumClusterCols(uint nCols)
    {
        nClusterCols = nCols;
    }

    void unlockClusterPage();
};

FENNEL_END_NAMESPACE

#endif

// End LcsClusterAccessBase.h

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