org.geotools.data.collection

Class CollectionFeatureSource.SubCollection

Object

DecoratingSimpleFeatureCollection

CollectionFeatureSource.SubCollection

All Implemented Interfaces:

SimpleFeatureCollection, FeatureCollection<SimpleFeatureType,SimpleFeature>

Enclosing class:

CollectionFeatureSource

protected class CollectionFeatureSource.SubCollection
extends DecoratingSimpleFeatureCollection

SubCollection for CollectionFeatureSource.

Will route any calls refining the feature collection back to CollectionFeatureSource. This is based on the success of ContentFeatureCollection.

Author:

Jody

Field Summary

Fields inherited from class DecoratingSimpleFeatureCollection

delegate

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SubCollection(Query query, SimpleFeatureCollection features)

Method Summary

Modifier and Type	Method and Description
SimpleFeatureCollection	sort(SortBy order) Obtained sorted contents.
SimpleFeatureCollection	subCollection(Filter filter) SimpleFeatureCollection "view" indicated by provided filter.

Methods inherited from class DecoratingSimpleFeatureCollection

accepts, canDelegate, contains, containsAll, equals, features, getBounds, getID, getSchema, hashCode, isEmpty, size, toArray, toArray

Methods inherited from class Object

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

Constructor Detail

SubCollection

protected SubCollection(Query query,
                        SimpleFeatureCollection features)

Method Detail

subCollection

public SimpleFeatureCollection subCollection(Filter filter)

Description copied from interface: FeatureCollection

SimpleFeatureCollection "view" indicated by provided filter.

The contents of the returned SimpleFeatureCollection are determined by applying the provider Filter to the entire contents of this FeatureCollection. The result is "live" and modifications will be shared.

This method is used cut down on the number of filter based methods required for a useful SimpleFeatureCollection construct. The FeatureCollections returned really should be considered as a temporary "view" used to control the range of a removeAll, or modify operation.

Example Use:

 collection.subCollection( filter ).clear();
 

The above recommended use is agreement with the Collections API precident of List.subList( start, end ).

The results of subCollection:

• are to be considered unordered
• may be an ordered FeatureList if requested when sortBy is indicated

Specified by:

subCollection in interface SimpleFeatureCollection

Specified by:

subCollection in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

subCollection in class DecoratingSimpleFeatureCollection

Returns:

SimpleFeatureCollection identified as subset.

See Also:

FeatureList

sort

public SimpleFeatureCollection sort(SortBy order)

Description copied from interface: FeatureCollection

Obtained sorted contents.

This method may not be supported by all implementations, consider the use of FeatureSource.features( Query ).

Specified by:

sort in interface SimpleFeatureCollection

Specified by:

sort in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

sort in class DecoratingSimpleFeatureCollection

Parameters:

order - Sort order

Returns:

FeatureCollection sorted in the indicated order