/usr/include/terralib/kernel/TeQuerierDBStr1.h is in libterralib-dev 4.3.0+dfsg.2-10.
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TerraLib - a library for developing GIS applications.
Copyright © 2001-2007 INPE and Tecgraf/PUC-Rio.
This code is part of the TerraLib library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
You should have received a copy of the GNU Lesser General Public
License along with this library.
The authors reassure the license terms regarding the warranties.
They specifically disclaim any warranties, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose.
The library provided hereunder is on an "as is" basis, and the authors have no
obligation to provide maintenance, support, updates, enhancements, or modifications.
In no event shall INPE and Tecgraf / PUC-Rio be held liable to any party for direct,
indirect, special, incidental, or consequential damages arising out of the use
of this library and its documentation.
*************************************************************************************/
/*! \file TeQuerierDBStr1.h
\brief This file contains a mechanism named "TeQuerierDBStr1" that is
responsible for loading spatio-temporal elements from a TerraLib database.
*/
#ifndef __TERRALIB_INTERNAL_QUERIER_DBSTR1_H
#define __TERRALIB_INTERNAL_QUERIER_DBSTR1_H
#include "TeQuerierDB.h"
/*! \class TeQuerierDBStr1
\brief A class responsible for loading spatio-temporal elements from a TerraLib database.
This class implements a mechanism that is responsible for loading
spatio-temporal elements from a TerraLib database, following a specific strategy.
Each spatio-temporal elements is represented through a TeSTInstance class.
This class is internally used by the factory of queriers. It should NOT be used
by anyone.
\sa
TeQuerierDB TeQuerierParams TeSTInstance
*/
class TL_DLL TeQuerierDBStr1 : public TeQuerierDB
{
private:
vector<string> uniqueNames_;
string lastObjId_;
int geomId_;
bool isGroup_; //! if the portal was built with statistics sql funcionts
bool groupInMemory_; //! if it must group the object instances in the memory
string linkName_;
string fromClause_; //store the sql clause(from and where) to return the number of instances
string whereClause_;
/* @name Internal functions to initialize portals */
//@{
bool initPortal(TeRepresentation& rep, TeTSEntry* ent=0);
bool initGeomPortal(TeRepresentation& rep, TeTSEntry* ent=0);
//@}
/* @name Internal functions to fill the STOs from portals */
//@{
bool fillSTOGrouped(TeSTInstance& sto, bool fetchInstance = true);
bool fillSTONoGrouped(TeSTInstance& sto);
bool fillGeomSTO(TeSTInstance& sto, unsigned int index);
//@}
public:
//! Constructor
TeQuerierDBStr1(TeQuerierParams* params) :
TeQuerierDB(params),
lastObjId_(""),
isGroup_(false),
groupInMemory_(false),
linkName_(""),
fromClause_(""),
whereClause_("")
{}
//! Loads instances
bool loadInstances(TeTSEntry* ent=0);
//! Returns each loaded instance
bool fetchInstance(TeSTInstance& sto);
//! Returns the number of instances
int numElemInstances();
};
/*! \class TeQuerierDBStr1Factory
\brief A class that define a factory to build a querier strategy (strategy 1) from TerraLib database.
\sa
TeQuerierImplFactory TeQuerierDBStr1
*/
class TL_DLL TeQuerierDBStr1Factory : public TeQuerierImplFactory
{
public:
//! Constructor
TeQuerierDBStr1Factory(const string& name) : TeQuerierImplFactory(name) {}
//! Builds a database querier
virtual TeQuerierImpl* build (const TeQuerierParams& arg)
{
TeQuerierParams* tempArg = new TeQuerierParams();
*tempArg = arg;
return new TeQuerierDBStr1(tempArg);
}
};
//! Creates a static factory to build TeQuerierDBStr1
namespace
{
static TeQuerierDBStr1Factory querierDBStr1("querierDBStr1");
};
#endif
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