org.geotools.wfs

Class CompositeFeatureCollection

Object

DataFeatureCollection

CompositeFeatureCollection

All Implemented Interfaces:

SimpleFeatureCollection, FeatureCollection<SimpleFeatureType,SimpleFeature>

public class CompositeFeatureCollection
extends DataFeatureCollection

Wraps multiple feature collections into a single.

This feature collection is used for wfs feature collections which can be made up of features from different schemas.

Author:

Justin Deoliveira, The Open Planning Project

Field Summary

Fields inherited from class DataFeatureCollection

id, listeners, schema

Constructor Summary

Constructors

Constructor and Description
CompositeFeatureCollection(List<FeatureCollection> collections)

Method Summary

Modifier and Type	Method and Description
boolean	addAll(Collection arg0) Optimized implementation of addAll that recognizes the use of collections obtained with subCollection( filter ).
ReferencedEnvelope	getBounds() Get the total bounds of this collection which is calculated by doing a union of the bounds of each feature inside of it
int	getCount()
FeatureId	getIdentifier()
SimpleFeatureType	getSchema() The schema for the child feature members of this collection.
protected Iterator<SimpleFeature>	openIterator() Returns a FeatureWriterIterator, or FeatureReaderIterator over content.
<T> T[]	toArray(T[] arg0)

Methods inherited from class DataFeatureCollection

accepts, add, addAll, addListener, clear, close, close, closeIterator, contains, containsAll, features, fireChange, fireChange, fireChange, getID, isEmpty, iterator, purge, reader, remove, removeAll, removeListener, retainAll, size, sort, subCollection, toArray, writer

Methods inherited from class Object

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

Constructor Detail

CompositeFeatureCollection

public CompositeFeatureCollection(List<FeatureCollection> collections)

Method Detail

openIterator

protected Iterator<SimpleFeature> openIterator()
                                        throws IOException

Description copied from class: DataFeatureCollection

Returns a FeatureWriterIterator, or FeatureReaderIterator over content.

If you have a way to tell that you are readonly please subclass with a less hardcore check - this implementations catches a UnsupportedOpperationsException from wrtier()!

Overrides:

openIterator in class DataFeatureCollection

Returns:

Iterator, should be closed closeIterator

Throws:

IOException

getSchema

public SimpleFeatureType getSchema()

Description copied from interface: FeatureCollection

The schema for the child feature members of this collection.

Represents the most general FeatureType in common to all the features in this collection.

• For a collection backed by a shapefiles (or database tables) the FeatureType returned by getSchema() will complete describe each and every child in the collection.
• For mixed content FeatureCollections you will need to check the FeatureType of each Feature as it is retrived from the collection
• The degenerate case returns the "_Feature" FeatureType, where the only thing known is that the contents are Features.

Specified by:

getSchema in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

getSchema in class DataFeatureCollection

Returns:

FeatureType describing the "common" schema to all child features of this collection

getBounds

public ReferencedEnvelope getBounds()

Description copied from interface: FeatureCollection

Get the total bounds of this collection which is calculated by doing a union of the bounds of each feature inside of it

Specified by:

getBounds in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Specified by:

getBounds in class DataFeatureCollection

Returns:

An Envelope containing the total bounds of this collection.

getCount

public int getCount()
             throws IOException

Specified by:

getCount in class DataFeatureCollection

Throws:

IOException

addAll

public boolean addAll(Collection arg0)

Description copied from class: DataFeatureCollection

Optimized implementation of addAll that recognizes the use of collections obtained with subCollection( filter ).

This method is constructed by either:

• Filter OR
• Removing an extact match of Filter AND

Overrides:

addAll in class DataFeatureCollection

toArray

public <T> T[] toArray(T[] arg0)

Specified by:

toArray in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

toArray in class DataFeatureCollection

See Also:

Collection.toArray(Object[])

getIdentifier

public FeatureId getIdentifier()