org.geotools.data.store

Class ReprojectingFeatureCollection

Object

DecoratingSimpleFeatureCollection

ReprojectingFeatureCollection

All Implemented Interfaces:

SimpleFeatureCollection, FeatureCollection<SimpleFeatureType,SimpleFeature>

public class ReprojectingFeatureCollection
extends DecoratingSimpleFeatureCollection

SimpleFeatureCollection decorator that reprojects all geometries of the features within the feature collection.

Author:

Justin

Field Summary

Fields inherited from class DecoratingSimpleFeatureCollection

delegate

Constructor Summary

Constructors

Constructor and Description
ReprojectingFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate, CoordinateReferenceSystem target)
ReprojectingFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate, CoordinateReferenceSystem source, CoordinateReferenceSystem target)
ReprojectingFeatureCollection(SimpleFeatureCollection delegate, CoordinateReferenceSystem target)
ReprojectingFeatureCollection(SimpleFeatureCollection delegate, CoordinateReferenceSystem source, CoordinateReferenceSystem target)

Method Summary

Modifier and Type	Method and Description
boolean	add(SimpleFeature o)
protected boolean	canDelegate(FeatureVisitor visitor) Methods for subclass to override in order to determine if the supplied visitor can be passed to the delegate collection.
SimpleFeatureIterator	features() Obtain a SimpleFeatureIterator of the Features within this SimpleFeatureCollection.
ReferencedEnvelope	getBounds() This method computes reprojected bounds the hard way, but computing them feature by feature.
SimpleFeatureType	getSchema() The schema for the child feature members of this collection.
static boolean	isGeometryless(FeatureVisitor visitor, SimpleFeatureType schema) Returns true if the visitor is geometryless, that is, it's not accessing a geometry field in the target schema
FeatureReader<SimpleFeatureType,SimpleFeature>	reader()
void	setTransformer(GeometryCoordinateSequenceTransformer transformer)
SimpleFeatureCollection	sort(SortBy order) Obtained sorted contents.
SimpleFeatureCollection	subCollection(Filter filter) SimpleFeatureCollection "view" indicated by provided filter.
Object[]	toArray()
<T> T[]	toArray(T[] a)

Methods inherited from class DecoratingSimpleFeatureCollection

accepts, contains, containsAll, equals, getID, hashCode, isEmpty, size

Methods inherited from class Object

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

Constructor Detail

ReprojectingFeatureCollection

public ReprojectingFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate,
                                     CoordinateReferenceSystem target)

ReprojectingFeatureCollection

public ReprojectingFeatureCollection(SimpleFeatureCollection delegate,
                                     CoordinateReferenceSystem target)

ReprojectingFeatureCollection

public ReprojectingFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate,
                                     CoordinateReferenceSystem source,
                                     CoordinateReferenceSystem target)

ReprojectingFeatureCollection

public ReprojectingFeatureCollection(SimpleFeatureCollection delegate,
                                     CoordinateReferenceSystem source,
                                     CoordinateReferenceSystem target)

Method Detail

setTransformer

public void setTransformer(GeometryCoordinateSequenceTransformer transformer)

reader

public FeatureReader<SimpleFeatureType,SimpleFeature> reader()
                                                      throws IOException

Throws:

IOException

features

public SimpleFeatureIterator features()

Description copied from interface: SimpleFeatureCollection

Obtain a SimpleFeatureIterator of the Features within this SimpleFeatureCollection.

The implementation of FeatureIterator must adhere to the rules of fail-fast concurrent modification. In addition (to allow for resource backed collections) the SimpleFeatureIterator.close() method must be called.

Example use:

 SimpleFeatureIterator iterator=collection.features();
 try {
     while( iterator.hasNext()  ){
          SimpleFeature feature = iterator.next();
          System.out.println( feature.getID() );
     }
 }
 finally {
     iterator.close();
 }
 

Specified by:

features in interface SimpleFeatureCollection

Specified by:

features in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

features in class DecoratingSimpleFeatureCollection

Returns:

A FeatureIterator.

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 DecoratingSimpleFeatureCollection

Returns:

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

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

toArray

public Object[] toArray()

Specified by:

toArray in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

toArray in class DecoratingSimpleFeatureCollection

See Also:

Collection.toArray()

toArray

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

Specified by:

toArray in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

toArray in class DecoratingSimpleFeatureCollection

See Also:

Collection.toArray(Object[])

add

public boolean add(SimpleFeature o)

getBounds

public ReferencedEnvelope getBounds()

This method computes reprojected bounds the hard way, but computing them feature by feature. This method could be faster if computed the reprojected bounds by reprojecting the original feature bounds a Shape object, thus getting the true shape of the reprojected envelope, and then computing the minimum and maximum coordinates of that new shape. The result would not a true representation of the new bounds.

Specified by:

getBounds in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

getBounds in class DecoratingSimpleFeatureCollection

Returns:

An Envelope containing the total bounds of this collection.

See Also:

org.geotools.data.FeatureResults#getBounds()

canDelegate

protected boolean canDelegate(FeatureVisitor visitor)

Description copied from class: DecoratingSimpleFeatureCollection

Methods for subclass to override in order to determine if the supplied visitor can be passed to the delegate collection.

The default is false and the visitor receives the decoraeted features.

Overrides:

canDelegate in class DecoratingSimpleFeatureCollection

isGeometryless

public static boolean isGeometryless(FeatureVisitor visitor,
                                     SimpleFeatureType schema)

Returns true if the visitor is geometryless, that is, it's not accessing a geometry field in the target schema