81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2015,
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Faculty of Mathematics and Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//[$][\$]
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*/
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#ifndef _DistTypeHash_h_
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#define _DistTypeHash_h_
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#include "DistTypeBasic.h"
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namespace drel {
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/*
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1 Class ~DistType~
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This class represents the distirbution type informations for the class
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drel. The supported types are represented by the enum distributionType.
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This type is used for hash distribution.
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*/
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class DistTypeHash : public DistTypeBasic {
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public:
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/*
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1.1 Methods
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*/
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DistTypeHash( distributionType _type, int _attr );
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DistTypeHash( const DistTypeHash& _distType );
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DistTypeHash &operator=( const DistTypeHash &_distType );
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virtual ~DistTypeHash( );
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virtual bool isEqual( DistTypeBasic* _distType );
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int getAttr( );
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virtual DistTypeBasic* copy( );
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static bool checkType( ListExpr list );
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virtual bool save( SmiRecord& valueRecord, size_t& offset,
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const ListExpr typeInfo );
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virtual ListExpr toListExpr( ListExpr typeInfo );
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virtual void print( );
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static bool computeNewAttrPos( ListExpr attrPosList, int& attrPos );
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/*
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1.2 Members
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1.2.1 ~attr~
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The number of used attribute to distribute the relation. The numbering
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starts with 0.
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*/
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int attr;
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};
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} // end of namespace drel
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#endif // _DistTypeHash_h_
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