153 lines
3.9 KiB
C++
153 lines
3.9 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004-2009, University in Hagen, Faculty of Mathematics
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and Computer Science, 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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1 MObjects.h
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*/
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#pragma once
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#include <memory>
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#include "Algebras/CRel/AttrArray.h"
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#include "Array.h"
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#include "Algebras/CRel/Ints.h"
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#include "DefTimes.h"
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namespace ColumnMovingAlgebra
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{
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/*
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1.1 Declaration of ~MObjects~
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~MObjects~ is the base class for all moving object attribute arrays.
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The term moving objects in this case means all data types, that
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are mappings from time to a certain base type so it includes moving real,
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moving boolean, moving integer and moving string.
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*/
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class MObjects : public CRelAlgebra::AttrArray
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{
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public:
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/*
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1.1.1 Constructors
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*/
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MObjects();
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MObjects(const MObjects &array,
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const CRelAlgebra::SharedArray<const uint64_t> &filter);
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virtual ~MObjects() { }
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/*
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1.1.2 Comparing Functions
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The crel algebra requires all attribute arrays to implement eight
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different comparison functions. To ease the implementation of our
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attribute arrays we provide six of the eight required functions in
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this base class. They are generic and call the two left functions,
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which still have to be implemented by attribute arrays derived
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from this class.
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*/
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virtual int CompareAlmost(uint64_t rowA, const AttrArray &arrayB,
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uint64_t rowB) const override;
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virtual bool Equals(uint64_t rowA, const AttrArray &arrayB,
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uint64_t rowB) const override;
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virtual bool EqualsAlmost(uint64_t rowA, const AttrArray &arrayB,
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uint64_t rowB) const override;
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virtual int CompareAlmost(uint64_t row, Attribute &value) const override;
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virtual bool Equals(uint64_t row, Attribute &value) const override;
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virtual bool EqualsAlmost(uint64_t row, Attribute &value) const override;
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/*
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1.1.3 Operators
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All moving objects share the operator present which checks whether the
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moving objects exists at a given instant, or is ever
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present during a given set of time intervals. So we will implement the
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operator present in this base class.
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*/
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void present(Instant instant, CRelAlgebra::LongInts & result);
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void present(temporalalgebra::Periods periods,
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CRelAlgebra::LongInts & result);
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protected:
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/*
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~mDefTimes~ represents the definition intervals of all moving object entries
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in the attribute array.
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*/
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std::shared_ptr<DefTimes> m_DefTimes;
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};
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/*
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1.2 Implementation of inline functions for ~MObjects~
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1.2.1 Constructors
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*/
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inline MObjects::MObjects() :
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m_DefTimes(std::make_shared<DefTimes>())
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{
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}
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inline MObjects::MObjects(const MObjects &array,
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const CRelAlgebra::SharedArray<const uint64_t> &filter) :
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AttrArray(filter),
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m_DefTimes(array.m_DefTimes)
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{
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}
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/*
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1.2.2 Operators
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*/
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inline void MObjects::present(Instant instant, CRelAlgebra::LongInts & result)
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{
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result.Clear();
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for (auto & iterator : GetFilter()) {
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int i = iterator.GetRow();
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if (m_DefTimes->present(i, instant))
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result.Append(i);
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}
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}
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inline void MObjects::present(temporalalgebra::Periods periods,
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CRelAlgebra::LongInts & result)
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{
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result.Clear();
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for (auto & iterator : GetFilter()) {
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int i = iterator.GetRow();
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if (m_DefTimes->present(i, periods))
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result.Append(i);
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}
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}
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}
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