Package com.kheops.jmap.server.datasources

Class SpatialDataSource

java.lang.Object

com.kheops.jmap.server.datasources.SpatialDataSource

Direct Known Subclasses:

RasterDataSource, VectorDataSource

public abstract class SpatialDataSource
extends Object

This abstract class represents a source of spatial data. Spatial data can be either vector data or raster data. Spatial data sources are used in JMapServer to read spatial data.

Constructor Summary

Constructors

Constructor	Description
SpatialDataSource()

Method Summary

Modifier and Type	Method	Description
abstract void	close()
abstract void	delete()	The delete() method is called when a spatial data source is being deleted in order to free and delete all resources used.
abstract DataSet	extractAttributes(QueryFilter[] queryFilters, Attribute[] attributes, Map<String,?> extraParameters)
abstract Attribute[]	getAttributeMetaData()
abstract SpatialDataSourceInfo	getDataSourceInfo()	Returns the spatial data source info that was used to initialize this spatial data source.
abstract Rectangle	getExtent()
abstract String	getName()	Returns the name of the current spatial data source.
abstract void	init(SpatialDataSourceInfo dataSourceInfo)
protected boolean	isCancelled()
abstract void	update()
protected void	validateProjection(QueryFilter[] queryFilters)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SpatialDataSource

public SpatialDataSource()

Method Details

getExtent

public abstract Rectangle getExtent()
                             throws Exception

Throws:

Exception

getDataSourceInfo

public abstract SpatialDataSourceInfo getDataSourceInfo()

Returns the spatial data source info that was used to initialize this spatial data source.

Returns:

the related SpatialDataSourceInfo instance.

getAttributeMetaData

public abstract Attribute[] getAttributeMetaData()
                                          throws Exception

Throws:

Exception

getName

public abstract String getName()

Returns the name of the current spatial data source.

Returns:

the name of the spatial data source.

update

public abstract void update()
                     throws Exception

Throws:

Exception

init

public abstract void init(SpatialDataSourceInfo dataSourceInfo)
                   throws Exception

Throws:

Exception

close

public abstract void close()
                    throws Exception

Throws:

Exception

delete

public abstract void delete()
                     throws Exception

The delete() method is called when a spatial data source is being deleted in order to free and delete all resources used.

Throws:

Exception

extractAttributes

public abstract DataSet extractAttributes(QueryFilter[] queryFilters,
 Attribute[] attributes,
 Map<String,?> extraParameters)
                                   throws Exception

Throws:

Exception

validateProjection

protected void validateProjection(QueryFilter[] queryFilters)

isCancelled

protected boolean isCancelled()