LbmTupleReader.h

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00001 /*
00002 // $Id: //open/dev/fennel/lucidera/bitmap/LbmTupleReader.h#5 $
00003 // Fennel is a library of data storage and processing components.
00004 // Copyright (C) 2005-2009 LucidEra, Inc.
00005 // Copyright (C) 2005-2009 The Eigenbase Project
00006 //
00007 // This program is free software; you can redistribute it and/or modify it
00008 // under the terms of the GNU General Public License as published by the Free
00009 // Software Foundation; either version 2 of the License, or (at your option)
00010 // any later version approved by The Eigenbase Project.
00011 //
00012 // This program is distributed in the hope that it will be useful,
00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015 // GNU General Public License for more details.
00016 //
00017 // You should have received a copy of the GNU General Public License
00018 // along with this program; if not, write to the Free Software
00019 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020 */
00021 
00022 #ifndef Fennel_LbmTupleReader_Included
00023 #define Fennel_LbmTupleReader_Included
00024 
00025 #include "fennel/exec/ExecStreamDefs.h"
00026 #include "fennel/tuple/TupleData.h"
00027 #include "fennel/lucidera/bitmap/LbmSegment.h"
00028 
00029 FENNEL_BEGIN_NAMESPACE
00030 
00031 typedef TupleData *PTupleData;
00032 
00039 class FENNEL_LBM_EXPORT LbmTupleReader
00040 {
00041 public:
00042     virtual ~LbmTupleReader();
00043 
00052     virtual ExecStreamResult read(PTupleData &pTupleData) = 0;
00053 };
00054 
00059 class FENNEL_LBM_EXPORT LbmStreamTupleReader
00060     : public LbmTupleReader
00061 {
00065     SharedExecStreamBufAccessor pInAccessor;
00066 
00070     PTupleData pInputTuple;
00071 
00072 public:
00081     void init(
00082         SharedExecStreamBufAccessor &pInAccessorInit,
00083         TupleData &bitmapSegTupleInit);
00084 
00085     // implement LbmTupleReader
00086     ExecStreamResult read(PTupleData &pTupleData);
00087 };
00088 
00093 class FENNEL_LBM_EXPORT LbmSingleTupleReader
00094     : public LbmTupleReader
00095 {
00099     bool hasTuple;
00100 
00104     PTupleData pInputTuple;
00105 
00106 public:
00112     void init(TupleData &bitmapSegTupleInit);
00113 
00114     // implement LbmTupleReader
00115     ExecStreamResult read(PTupleData &pTupleData);
00116 };
00117 
00118 FENNEL_END_NAMESPACE
00119 
00120 #endif
00121 
00122 // End LbmTupleReader.h

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