IlvSDOTileLoader Class Reference

The base class (to be subclassed) to implement tile loaders for Oracle SDO. More...

#include <ilviews/maps/format/oracle/sdotileload.h>

Inheritance diagram for IlvSDOTileLoader:

Public Member Functions
virtual IlvMapsError	dbmsRestored ()
	Called by the IlvSDOLayer read from an .ilv file, after the connection to an Oracle SDO database has been restored. More...
IldDbms *	getDbms () const
	Returns the IldDbms representing the connection to the Oracle database. More...
IlvMapsError	getInitStatus () const
	Returns the error code that may have happened during the loader construction. More...
virtual IldRequest *	getRequest (IlvTile *tile)
	Returns the request containing the SDO geometries that intersect the specified tile. More...
virtual IlvRect *	getSize ()
	Returns the bounding box of the data set managed by the tile loader. More...
virtual const IlvRect &	getTileOrigin () const
	Returns the origin tile used by the load-on demand mechanism.
virtual IlBoolean	isPersistent () const
	Indicates whether this IlvSDOTileLoader is persistent. More...
virtual IlvMapsError	load (IlvTile *tile)
	Loads a tile. More...
virtual void	release (IlvTile *tile)
	Releases the content of a tile when required by the cache of the layer. More...
Public Member Functions inherited from IlvTileLoader
virtual void	controllerDeleted (IlvTileController *controller)
	Called when the controller is deleted. More...
virtual void	tileDeleted (IlvTile *tile)
	Called when a tile is deleted during the controller destruction. More...

Protected Member Functions
	IlvSDOTileLoader (IldDbms *dbms)
	Initializes a new instance of IlvSDOTileLoader. More...
IldRequest *	executeQuery (const char *query)
	Executes the specified query and exports a trace if the SQL traces are enabled. More...

Friends
class	IlvObjectSDOLayer
class	IlvSDOLayer

Detailed Description

The base class (to be subclassed) to implement tile loaders for Oracle SDO.

Library: ilvdbmaps

See also

IlvSDOLayer.

Constructor & Destructor Documentation

IlvSDOTileLoader()

IlvSDOTileLoader::IlvSDOTileLoader ( IldDbms *  dbms )

protected

Initializes a new instance of IlvSDOTileLoader.

Parameters

dbms	The database connection.

Member Function Documentation

dbmsRestored()

virtual IlvMapsError IlvSDOTileLoader::dbmsRestored ( )

virtual

Called by the IlvSDOLayer read from an .ilv file, after the connection to an Oracle SDO database has been restored.

Returns

An IlvMapsError code.

Reimplemented in IlvDefaultSDOTileLoader, and IlvDefaultObjectSDOTileLoader.

executeQuery()

IldRequest* IlvSDOTileLoader::executeQuery ( const char *  query )

protected

Executes the specified query and exports a trace if the SQL traces are enabled.

Parameters

query

The result set of the executed query.

Returns

The request.

See also

IlvSDOUtil::EnableSQLTraces().

getDbms()

IldDbms* IlvSDOTileLoader::getDbms

(

)

const

Returns the IldDbms representing the connection to the Oracle database.

Returns

The connection to the Oracle database.

getInitStatus()

IlvMapsError IlvSDOTileLoader::getInitStatus

(

)

const

Returns the error code that may have happened during the loader construction.

Returns

The error code that may have happened during the loader construction.

getRequest()

virtual IldRequest* IlvSDOTileLoader::getRequest ( IlvTile *  tile )

virtual

Returns the request containing the SDO geometries that intersect the specified tile.

The default implementation returns 0.

Parameters

tile	The tile to be filled with the SDO geometries.

Returns

The IldRequest containing the SDO geometries that intersect the specified tile.

See also

load().

Reimplemented in IlvDefaultSDOTileLoader, and IlvDefaultObjectSDOTileLoader.

getSize()

virtual IlvRect* IlvSDOTileLoader::getSize ( )

virtual

Returns the bounding box of the data set managed by the tile loader.

If the bounding box cannot be computed, this method can return 0. The IlvSDOLayer using this object will have an undefined size.

The default implementation returns 0.

Returns

The bounding box of the data set managed by the tile loader.

Reimplemented in IlvDefaultSDOTileLoader, and IlvDefaultObjectSDOTileLoader.

isPersistent()

virtual IlBoolean IlvSDOTileLoader::isPersistent ( ) const

virtual

Indicates whether this IlvSDOTileLoader is persistent.

Returns

IlTrue if the IlvSDOTileLoader is persistent, IlFalse otherwise.

Implements IlvTileLoader.

load()

virtual IlvMapsError IlvSDOTileLoader::load ( IlvTile *  tile )

virtual

Loads a tile.

The default implementation does nothing and returns IlvMaps::NoError().

Returns

The resulting error code.

Implements IlvTileLoader.

Reimplemented in IlvDefaultSDOTileLoader, and IlvDefaultObjectSDOTileLoader.

release()

virtual void IlvSDOTileLoader::release ( IlvTile *  tile )

virtual

Releases the content of a tile when required by the cache of the layer.

Parameters

tile	The tile to be released.

Implements IlvTileLoader.