org.geotools.data.crs

Class ReprojectFeatureResults

Object

AbstractFeatureCollection

ReprojectFeatureResults

All Implemented Interfaces:

SimpleFeatureCollection, FeatureCollection<SimpleFeatureType,SimpleFeature>

public class ReprojectFeatureResults
extends AbstractFeatureCollection

ReprojectFeatureReader provides a reprojection for FeatureTypes.

ReprojectFeatureResults is a wrapper used to reproject GeometryAttributes to a user supplied CoordinateReferenceSystem from the original CoordinateReferenceSystem supplied by the original FeatureResults.

Example Use:

 ReprojectFeatureResults results =
     new ReprojectFeatureResults( originalResults, reprojectCS );

 CoordinateReferenceSystem originalCS =
     originalResults.getFeatureType().getDefaultGeometry().getCoordinateSystem();

 CoordinateReferenceSystem newCS =
     results.getFeatureType().getDefaultGeometry().getCoordinateSystem();

 assertEquals( reprojectCS, newCS );
 

Author:

aaime, $Author: jive $ (last modification)

Field Summary

Fields inherited from class AbstractFeatureCollection

id, schema

Constructor Summary

Constructors

Constructor and Description
ReprojectFeatureResults(FeatureCollection<SimpleFeatureType,SimpleFeature> results, CoordinateReferenceSystem destinationCS) Creates a new reprojecting feature results

Method Summary

Modifier and Type	Method and Description
void	accepts(FeatureVisitor visitor, ProgressListener progress) Visit the contents of a feature collection.
protected boolean	canDelegate(FeatureVisitor visitor)
void	closeIterator(Iterator close)
ReferencedEnvelope	getBounds() This method computes reprojected bounds the hard way, but computing them feature by feature.
FeatureCollection<SimpleFeatureType,SimpleFeature>	getOrigin() Returns the feature results wrapped by this reprojecting feature results
Iterator<SimpleFeature>	openIterator() Factory method used to open an iterator over collection contents for use by AbstractFeatureCollection.iterator() and AbstractFeatureCollection.features().
int	size() Returns the number of elements in this collection.

Methods inherited from class AbstractFeatureCollection

contains, containsAll, features, getID, getSchema, isEmpty, iterator, sort, subCollection, toArray, toArray

Methods inherited from class Object

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

Constructor Detail

ReprojectFeatureResults

public ReprojectFeatureResults(FeatureCollection<SimpleFeatureType,SimpleFeature> results,
                               CoordinateReferenceSystem destinationCS)
                        throws IOException,
                               SchemaException,
                               TransformException,
                               OperationNotFoundException,
                               NoSuchElementException,
                               FactoryException

Creates a new reprojecting feature results

Throws:

IOException

SchemaException

TransformException

OperationNotFoundException

NoSuchElementException

FactoryException

Method Detail

openIterator

public Iterator<SimpleFeature> openIterator()

Description copied from class: AbstractFeatureCollection

Factory method used to open an iterator over collection contents for use by AbstractFeatureCollection.iterator() and AbstractFeatureCollection.features().

If you return an instance of FeatureIterator some effort is taken to call the FeatureIterator.close() internally, however we cannot offer any assurance that client code using AbstractFeatureCollection.iterator() will perform the same check.

Specified by:

openIterator in class AbstractFeatureCollection

Returns:

Iterator over collection contents

closeIterator

public void closeIterator(Iterator close)

size

public int size()

Description copied from class: AbstractFeatureCollection

Returns the number of elements in this collection.

Specified by:

size in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Specified by:

size in class AbstractFeatureCollection

Returns:

Number of items, or Interger.MAX_VALUE

See Also:

Collection.size()

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 minumum and maximum coordinates of that new shape. The result would not a true representation of the new bounds, but it would be guaranteed to be larger that the true representation.

Specified by:

getBounds in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Specified by:

getBounds in class AbstractFeatureCollection

Returns:

An Envelope containing the total bounds of this collection.

See Also:

org.geotools.data.FeatureResults#getBounds()

getOrigin

public FeatureCollection<SimpleFeatureType,SimpleFeature> getOrigin()

Returns the feature results wrapped by this reprojecting feature results

accepts

public void accepts(FeatureVisitor visitor,
                    ProgressListener progress)
             throws IOException

Description copied from interface: FeatureCollection

Visit the contents of a feature collection.

The order of traversal is dependent on the FeatureCollection implementation; some collections are able to make efficient use of an internal index in order to quickly visit features located in the same region.

Specified by:

accepts in interface FeatureCollection<SimpleFeatureType,SimpleFeature>

Overrides:

accepts in class AbstractFeatureCollection

Parameters:

visitor - Closure applied to each feature in turn.

progress - Used to report progress, may be used to interrupt the operation

Throws:

IOException

canDelegate

protected boolean canDelegate(FeatureVisitor visitor)