mirror of https://gitee.com/openkylin/vtk9.git
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPostgreSQLDatabasePrivate.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/*-------------------------------------------------------------------------
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Copyright 2008 Sandia Corporation.
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Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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the U.S. Government retains certain rights in this software.
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-------------------------------------------------------------------------*/
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/**
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* @class vtkPostgreSQLDatabasePrivate
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* @brief internal details of a connection to a PostgreSQL database
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*
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*
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*
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* This class does two things. First, it holds the (pointer to the)
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* PGconn struct that represents an actual database connection. Second,
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* it holds a map from Postgres data types as they exist in the database
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* to VTK data types.
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*
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* You should never have to deal with this class outside of
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* vtkPostgreSQLDatabase and vtkPostgreSQLQuery.
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*/
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#ifndef vtkPostgreSQLDatabasePrivate_h
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#define vtkPostgreSQLDatabasePrivate_h
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#include "vtkStdString.h"
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#include "vtkTimeStamp.h"
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#include "vtkType.h"
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#include <libpq-fe.h>
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#include <map>
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class vtkPostgreSQLDatabasePrivate
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{
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public:
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vtkPostgreSQLDatabasePrivate() { this->Connection = nullptr; }
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/**
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* Destroy the database connection. Any uncommitted transaction will be aborted.
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*/
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virtual ~vtkPostgreSQLDatabasePrivate()
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{
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if (this->Connection)
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{
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PQfinish(this->Connection);
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}
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}
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// Given a Postgres column type OID, return a VTK array type (see vtkType.h).
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int GetVTKTypeFromOID(Oid pgtype)
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{
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std::map<Oid, int>::const_iterator it = this->DataTypeMap.find(pgtype);
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if (it == this->DataTypeMap.end())
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{
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return VTK_STRING;
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}
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return it->second;
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}
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// This is the actual database connection. It will be nullptr if no
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// connection is open.
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PGconn* Connection;
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// Map Postgres column types to VTK types.
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std::map<Oid, int> DataTypeMap;
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};
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#endif // vtkPostgreSQLDatabasePrivate_h
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// VTK-HeaderTest-Exclude: vtkPostgreSQLDatabasePrivate.h
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