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:

List of all members.

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.
IldDbms *	getDbms () const
	Returns the IldDbms representing the connection to the Oracle database.
IlvMapsError	getInitStatus () const
	Returns the error code that may have happened during the loader construction.
virtual IldRequest *	getRequest (IlvTile *tile)
	Returns the IldRequest containing the SDO geometries that intersect the specified tile.
virtual IlvRect *	getSize ()
	Returns the bounding box of the data set managed by the tile loader.
virtual const IlvRect &	getTileOrigin () const
	Returns the origin tile used by the load-on demand mechanism.
virtual IlBoolean	isPersistent () const
	Returns IlTrue.
virtual IlvMapsError	load (IlvTile *tile)
	Virtual method implemented in the subclasses.
virtual void	release (IlvTile *tile)
	Releases the content of a tile when required by the cache of the layer.
Protected Member Functions
	IlvSDOTileLoader (IldDbms *dbms)
	Initializes an instance of IlvSDOTileLoader.
IldRequest *	executeQuery (const char *query)
	Executes the specified query and exports a trace if the SQL traces are enabled.
Friends
class	IlvObjectSDOLayer
class	IlvSDOLayer

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Detailed Description

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

Library: ilvdbmaps

See also:

IlvSDOLayer

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Constructor & Destructor Documentation

IlvSDOTileLoader::IlvSDOTileLoader

(

IldDbms *

dbms

)

[protected]

Initializes an instance of IlvSDOTileLoader.

Parameters:

dbms

The IldDbms.

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Member Function Documentation

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 IlvDefaultObjectSDOTileLoader, and IlvDefaultSDOTileLoader.

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 IldRequest

See also:

IlvSDOUtil::EnableSQLTraces

virtual IldRequest* IlvSDOTileLoader::getRequest

(

IlvTile *

tile

)

[virtual]

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

Returns 0 and must be implemented in the subclass.

See also:

IlvSDOTileLoader::load

Parameters:

tile

The tile to be filled with the SDO geometries.

Reimplemented in IlvDefaultObjectSDOTileLoader, and IlvDefaultSDOTileLoader.

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.

Returns:

0

Reimplemented in IlvDefaultObjectSDOTileLoader, and IlvDefaultSDOTileLoader.

virtual IlBoolean IlvSDOTileLoader::isPersistent

(

)

const [virtual]

Returns IlTrue.

Returns:

IlTrue if the IlvSDOTileLoader is persistent, IlFalse otherwise.

Implements IlvTileLoader.

virtual IlvMapsError IlvSDOTileLoader::load

(

IlvTile *

tile

)

[virtual]

Virtual method implemented in the subclasses.

Returns:

IlvMaps::NoError().

Implements IlvTileLoader.

Reimplemented in IlvDefaultObjectSDOTileLoader, and IlvDefaultSDOTileLoader.

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.