com.vividsolutions.jump.workbench.model.cache

Class CachingFeatureCollection

java.lang.Object

com.vividsolutions.jump.feature.FeatureCollectionWrapper

com.vividsolutions.jump.workbench.model.cache.CachingFeatureCollection

All Implemented Interfaces:

FeatureCollection

public class CachingFeatureCollection
extends FeatureCollectionWrapper

Caches features to prevent unnecessary queries. Useful for wrapping database-backed FeatureCollections. All calls are delegated to the cache, except for calls to query(envelope).iterator() where (1) the envelope is not within the cache envelope, and (2) the call is made in a non-GUI thread.

Constructor Summary

Constructors

Constructor and Description
CachingFeatureCollection(FeatureCollection featureCollection)

Method Summary

Methods

Modifier and Type	Method and Description
void	emptyCache()
com.vividsolutions.jts.geom.Envelope	getEnvelope() Returns the bounds of this collection.
FeatureSchema	getFeatureSchema() Returns information about this FeatureCollection
java.util.List	query(com.vividsolutions.jts.geom.Envelope envelope) A quick search for features, using an envelope comparison.
CachingFeatureCollection	setCachingByEnvelope(boolean cachingByEnvelope) This setting is ignored if the call to query(envelope).iterator() is made on the GUI thread, because long queries would make the GUI unresponsive.

Methods inherited from class com.vividsolutions.jump.feature.FeatureCollectionWrapper

add, addAll, checkNotWrappingSameClass, clear, getFeatureCollection, getFeatures, getUltimateWrappee, getWrappee, hasWrapper, isEmpty, iterator, remove, remove, removeAll, setFeatureCollection, size

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingFeatureCollection

public CachingFeatureCollection(FeatureCollection featureCollection)

Method Detail

getEnvelope

public com.vividsolutions.jts.geom.Envelope getEnvelope()

Description copied from interface: FeatureCollection

Returns the bounds of this collection.

Specified by:

getEnvelope in interface FeatureCollection

Overrides:

getEnvelope in class FeatureCollectionWrapper

Returns:

the smallest Envelope enclosing all the Features in this collection

See Also:

FeatureCollectionWrapper.getEnvelope()

getFeatureSchema

public FeatureSchema getFeatureSchema()

Description copied from interface: FeatureCollection

Returns information about this FeatureCollection

Specified by:

getFeatureSchema in interface FeatureCollection

Overrides:

getFeatureSchema in class FeatureCollectionWrapper

Returns:

the types of the attributes of the features in this collection

See Also:

FeatureCollectionWrapper.getFeatureSchema()

query

public java.util.List query(com.vividsolutions.jts.geom.Envelope envelope)

Description copied from interface: FeatureCollection

A quick search for features, using an envelope comparison.

Specified by:

query in interface FeatureCollection

Overrides:

query in class FeatureCollectionWrapper

Parameters:

envelope - the envelope to query against

Returns:

features whose envelopes intersect the given envelope

setCachingByEnvelope

public CachingFeatureCollection setCachingByEnvelope(boolean cachingByEnvelope)

This setting is ignored if the call to query(envelope).iterator() is made on the GUI thread, because long queries would make the GUI unresponsive.

Parameters:

cachingByEnvelope - whether query(envelope).iterator() delegates to the cache if envelope is within the cache envelope

emptyCache

public void emptyCache()