ReshapeExecStream.h

Go to the documentation of this file.

/*
// $Id: //open/dev/fennel/exec/ReshapeExecStream.h#9 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2005-2009 The Eigenbase Project
// Copyright (C) 2005-2009 SQLstream, Inc.
// Copyright (C) 2005-2009 LucidEra, Inc.
// Portions Copyright (C) 2004-2009 John V. Sichi
//
// 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_ReshapeExecStream_Included
#define Fennel_ReshapeExecStream_Included

#include "fennel/common/FemEnums.h"
#include "fennel/exec/ConduitExecStream.h"
#include "fennel/exec/DynamicParam.h"
#include "fennel/tuple/TupleProjectionAccessor.h"

#include <boost/shared_array.hpp>

FENNEL_BEGIN_NAMESPACE

struct FENNEL_EXEC_EXPORT ReshapeParameter
{
    DynamicParamId dynamicParamId;

    uint compareOffset;

    bool outputParam;

    ReshapeParameter(
        DynamicParamId dynamicParamIdInit,
        uint compareOffsetInit,
        bool outputParamInit) :
        dynamicParamId(dynamicParamIdInit),
        compareOffset(compareOffsetInit),
        outputParam(outputParamInit)
    {
    }
};

struct FENNEL_EXEC_EXPORT ReshapeExecStreamParams
    : public ConduitExecStreamParams
{
    CompOperator compOp;

    boost::shared_array<FixedBuffer> pCompTupleBuffer;

    TupleProjection inputCompareProj;

    TupleProjection outputProj;

    std::vector<ReshapeParameter> dynamicParameters;
};

class FENNEL_EXEC_EXPORT ReshapeExecStream
    : public ConduitExecStream
{
    CompOperator compOp;

    std::vector<ReshapeParameter> dynamicParameters;

    bool paramsRead;

    TupleData paramCompareData;

    TupleProjectionAccessor inputCompareProjAccessor;

    TupleData inputCompareData;

    boost::shared_array<FixedBuffer> compTupleBuffer;

    TupleDescriptor compTupleDesc;

    uint numCompDynParams;

    TupleProjection lastKey;

    TupleDescriptor lastKeyDesc;

    TupleProjectionAccessor outputProjAccessor;

    TupleDescriptor inputOutputDesc;

    TupleData inputOutputData;

    TupleDescriptor outputDesc;

    TupleData outputData;

    bool castRequired;

    bool producePending;

    void initCompareData(
        ReshapeExecStreamParams const &params,
        TupleDescriptor const &inputDesc,
        TupleAccessor const &inputAccessor);

    void copyCompareTuple(
        TupleDescriptor const &tupleDesc,
        TupleData &tupleData,
        PBuffer tupleBuffer);

    bool checkCastTypes(
        const TupleProjection &compareProj,
        const TupleDescriptor &inputTupleDesc,
        const TupleDescriptor &outputTupleDesc);

    bool nullFilter(const TupleProjection &compareProj, uint colno);

    void readDynamicParams();

    bool compareInput();

    void castOutput();

public:
    // implement ExecStream
    virtual void prepare(ReshapeExecStreamParams const &params);
    virtual void open(bool restart);
    virtual ExecStreamResult execute(ExecStreamQuantum const &quantum);
    virtual void closeImpl();
};

FENNEL_END_NAMESPACE

#endif

// End ReshapeExecStream.h

---