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secondo/Algebras/PropertyGraph2/QueryOutputFields.h
2026-01-23 17:03:45 +08:00

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/*
----
This file is part of SECONDO.
Copyright (C) 2012, University in Hagen
Faculty of Mathematic and Computer Science,
Database Systems for New Applications.
SECONDO 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.
SECONDO 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 SECONDO; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
----
*/
#ifndef QUERYOUTPUTFIELDS_H
#define QUERYOUTPUTFIELDS_H
#include "NestedList.h"
#include "ListUtils.h"
#include "NList.h"
#include <list>
namespace pgraph2 {
class MemoryGraphObject;
enum AliasType { AliasIsNode, AliasIsEdge };
//-----------------------------------------------------------------------------
class QueryOutputField
{
public:
std::string NodeAlias="";
std::string PropertyName="";
std::string OutputName="";
int index;
std::string datatype;
};
//-----------------------------------------------------------------------------
class QueryAliasInfo
{
public:
AliasType Type=AliasIsNode;
std::string AliasName="";
std::string TypeName="";
};
//-----------------------------------------------------------------------------
class QueryAliasList
{
public:
std::list<QueryAliasInfo> list;
void AddNode(std::string aliasname, std::string typename_);
void AddEdge(std::string aliasname, std::string typename_);
void Update(std::string aliasname, std::string typename_);
};
//-----------------------------------------------------------------------------
class QueryOutputFields
{
public:
std::list<QueryOutputField*> Fields;
void ReadFromList(std::string list);
void ReadFromList(ListExpr list);
ListExpr StreamTypeDefinition(QueryAliasList *aliaslist,
MemoryGraphObject *pgmem);
};
} // namespace
#endif