LbmBitOpExecStream.h

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/*
// $Id: //open/dev/fennel/lucidera/bitmap/LbmBitOpExecStream.h#8 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2006-2009 LucidEra, Inc.
// Copyright (C) 2006-2009 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_LbmBitOpExecStream_Included
#define Fennel_LbmBitOpExecStream_Included

#include "fennel/tuple/TupleData.h"
#include "fennel/exec/ConfluenceExecStream.h"
#include "fennel/exec/DynamicParam.h"
#include "fennel/lucidera/bitmap/LbmSegmentReader.h"
#include "fennel/lucidera/bitmap/LbmSegmentWriter.h"

FENNEL_BEGIN_NAMESPACE

struct LbmBitOpExecStreamParams : public ConfluenceExecStreamParams
{
    DynamicParamId rowLimitParamId;

    DynamicParamId startRidParamId;
};

class FENNEL_LBM_EXPORT LbmBitOpExecStream
    : public ConfluenceExecStream
{
protected:
    DynamicParamId rowLimitParamId;

    DynamicParamId startRidParamId;

    TupleDatum rowLimitDatum;

    TupleDatum startRidDatum;

    RecordNum rowLimit;

    LcsRid startRid;

    boost::scoped_array<LbmSegmentReader> segmentReaders;

    uint nInputs;

    uint iInput;

    boost::scoped_array<TupleData> bitmapSegTuples;

    LbmSegmentWriter segmentWriter;

    boost::scoped_array<FixedBuffer> outputBuf;

    boost::scoped_array<FixedBuffer> byteSegBuf;

    PBuffer pByteSegBuf;

    uint bitmapBufSize;

    TupleData outputTuple;

    bool producePending;

    LcsRid addRid;

    PBuffer addByteSeg;

    uint addLen;

    int nFields;

    ExecStreamResult producePendingOutput(uint iInput);

    ExecStreamResult readInput(
        uint iInput, LcsRid &currRid, PBuffer &currByteSeg, uint &currLen);

    bool flush();

    bool addSegments();

    void writeStartRidParamValue();

    virtual bool produceTuple(TupleData bitmapTuple);

public:
    virtual void prepare(LbmBitOpExecStreamParams const &params);
    virtual void open(bool restart);
    virtual void closeImpl();
};

FENNEL_END_NAMESPACE

#endif

// End LbmBitOpExecStream.h

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