151 lines
4.5 KiB
C++
151 lines
4.5 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of 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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//paragraph [1] Title: [{\Large \bf \begin{center}] [\end{center}}]
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//characters [1] Type: [] []
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//characters [2] Type: [] []
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//[ae] [\"{a}]
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//[oe] [\"{o}]
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//[ue] [\"{u}]
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//[ss] [{\ss}]
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//[Ae] [\"{A}]
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//[Oe] [\"{O}]
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//[Ue] [\"{U}]
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//[x] [$\times $]
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//[->] [$\rightarrow $]
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//[toc] [\tableofcontents]
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[1] Implementation of datatype TupleDescr and operators.
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[toc]
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1 TupleDescr class implementation
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see TupleDescr.cpp for details.
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*/
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#ifndef __TUPLEDESCR_H__
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#define __TUPLEDESCR_H__
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#include "Algebra.h"
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#include "NestedList.h"
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#include "ListUtils.h"
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#include "NList.h"
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#include "StandardTypes.h"
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#include "Algebras/Record/Record.h"
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#include "Algebras/Collection/CollectionAlgebra.h"
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#include "VTree.h"
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#include <string>
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class Tuple;
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class TupleType;
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namespace cstream {
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class VTuple;
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typedef enum {TUPLE, RECORD, VECTOR} enumMode;
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class TNode {
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public:
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TNode(NodeType ntype) : _type(ntype) {};
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NodeType _type;
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std::list<TNode*> _children;
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};
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class TupleDescr : public Attribute {
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public:
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TupleDescr();
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TupleDescr(const std::string& s);
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TupleDescr(const ListExpr& list);
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TupleDescr(const TupleDescr& td);
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~TupleDescr();
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/* Secondo methods */
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static void* Cast(void* addr);
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static int SizeOf();
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static bool TypeCheck(ListExpr type, ListExpr& errorInfo);
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static const std::string BasicType();
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static const bool CheckType(const ListExpr list);
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static ListExpr Property();
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static Word In( const ListExpr typeInfo, const ListExpr instance,
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const int errorPos, ListExpr&errorInfo, bool& correct);
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static ListExpr Out(ListExpr typeInfo, Word value);
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static ListExpr Out(TupleDescr* td);
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static Word Create(const ListExpr typeInfo);
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static void Delete(const ListExpr typeInfo, Word& w);
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static void Close(ListExpr typeInfo, Word& w);
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static Word CloneTD(const ListExpr typeInfo, const Word& w);
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/* Attribute methods */
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virtual int NumOfFLOBs() const;
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virtual Flob* GetFLOB(const int i);
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int Compare(const Attribute* arg) const;
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bool Adjacent(const Attribute* arg) const;
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size_t Sizeof() const;
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size_t HashValue() const;
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void CopyFrom(const Attribute* arg);
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Attribute* Clone() const;
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/* Helper methods */
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char* Get() const;
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const std::string GetString() const;
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bool Import(const ListExpr& list);
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bool Import(const char* s, std::string& error);
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bool BuildTree(std::string& error);
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TupleType* CreateTupleType();
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ListExpr GetTupleTypeExpr();
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int FindAttribute(const Node* parent, Node* attrnode);
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void TraverseMatchTree(Node* n1, Node* n2, bool& match);
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bool IsProjectable(TupleDescr* td);
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void GetTypeStringRec(Node* parent, Node* n, std::string& s);
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std::string GetTypeString(Node* n);
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Attribute* GetAttribute(enumMode mode, void* src, int idx, int vecidx);
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void SetNewAttribute(enumMode mode, void* dst, int idx, Attribute* a,
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const std::string& type, const std::string& name);
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void CopyAttribute( enumMode mode, void* dsrc, void* ddst,
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int srcidx, int dstidx,
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const std::string& type, const std::string& name, int vecidx);
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void ProjectTupleRec(Node* nsrc, Node* ndst, void* dsrc, void* ddst,
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enumMode mode, int vecidx, bool& match);
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Tuple* ProjectTuple(VTuple* vtsrc, bool& projected);
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private:
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Node* _root;
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int _max_depth;
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int _num_nodes;
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Flob _data;
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};
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};
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#endif
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