LbmUnionWorkspace.h

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/*
// $Id: //open/dev/fennel/lucidera/bitmap/LbmUnionWorkspace.h#9 $
// 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_LbmUnionWorkspace_Included
#define Fennel_LbmUnionWorkspace_Included

#include "fennel/common/ByteBuffer.h"
#include "fennel/lucidera/bitmap/LbmByteSegment.h"
#include "fennel/lucidera/bitmap/LbmSegment.h"

FENNEL_BEGIN_NAMESPACE

typedef ByteWindow<LbmByteNumberPrimitive> LbmUnionMergeArea;

class FENNEL_LBM_EXPORT LbmUnionWorkspace
{
    LbmUnionMergeArea mergeArea;

    uint maxSegmentSize;

    bool limited;

    LbmByteNumber productionLimitByte;

    LbmByteSegment segment;

    void advanceToByteNum(LbmByteNumber requestedByteNum);

public:
    void init(SharedByteBuffer pBuffer, uint maxSegmentSize);

    void reset();

    void advanceToSrid(LcsRid requestedSrid);

    void advancePastSegment();

    void setProductionLimit(LcsRid productionLimitRid);

    void removeLimit();

    bool isEmpty() const;

    bool canProduce();

    const LbmByteSegment &getSegment();

    const LbmByteSegment &getContiguousSegment();

    bool addSegment(const LbmByteSegment &segment);
};

FENNEL_END_NAMESPACE

#endif

// End LbmUnionWorkspace.h

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