LbmTupleReader.h

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/*
// $Id: //open/dev/fennel/lucidera/bitmap/LbmTupleReader.h#5 $
// 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_LbmTupleReader_Included
#define Fennel_LbmTupleReader_Included

#include "fennel/exec/ExecStreamDefs.h"
#include "fennel/tuple/TupleData.h"
#include "fennel/lucidera/bitmap/LbmSegment.h"

FENNEL_BEGIN_NAMESPACE

typedef TupleData *PTupleData;

class FENNEL_LBM_EXPORT LbmTupleReader
{
public:
    virtual ~LbmTupleReader();

    virtual ExecStreamResult read(PTupleData &pTupleData) = 0;
};

class FENNEL_LBM_EXPORT LbmStreamTupleReader
    : public LbmTupleReader
{
    SharedExecStreamBufAccessor pInAccessor;

    PTupleData pInputTuple;

public:
    void init(
        SharedExecStreamBufAccessor &pInAccessorInit,
        TupleData &bitmapSegTupleInit);

    // implement LbmTupleReader
    ExecStreamResult read(PTupleData &pTupleData);
};

class FENNEL_LBM_EXPORT LbmSingleTupleReader
    : public LbmTupleReader
{
    bool hasTuple;

    PTupleData pInputTuple;

public:
    void init(TupleData &bitmapSegTupleInit);

    // implement LbmTupleReader
    ExecStreamResult read(PTupleData &pTupleData);
};

FENNEL_END_NAMESPACE

#endif

// End LbmTupleReader.h

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