org.geotools.data.store

Class ReTypingFeatureCollection

Object

DecoratingSimpleFeatureCollection

ReTypingFeatureCollection

All Implemented Interfaces:

SimpleFeatureCollection, FeatureCollection<SimpleFeatureType,SimpleFeature>

public class ReTypingFeatureCollection
extends DecoratingSimpleFeatureCollection

SimpleFeatureCollection decorator which decorates a feature collection "re-typing" its schema based on attributes specified in a query.

Author:

Justin Deoliveira, The Open Planning Project

Field Summary

Fields inherited from class DecoratingSimpleFeatureCollection

delegate

Constructor Summary

Constructors

Constructor and Description
ReTypingFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate, SimpleFeatureType featureType)
ReTypingFeatureCollection(SimpleFeatureCollection delegate, SimpleFeatureType featureType)

Method Summary

Modifier and Type	Method and Description
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.
SimpleFeatureType	getSchema() The schema for the child feature members of this collection.
static boolean	isTypeCompatible(FeatureVisitor visitor, SimpleFeatureType featureType) Checks if the visitor is accessing only properties available in the specified feature type, or as a special case, if it's a count visitor accessing no properties at all
FeatureReader<SimpleFeatureType,SimpleFeature>	reader()

Methods inherited from class DecoratingSimpleFeatureCollection

accepts, contains, containsAll, equals, getBounds, getID, hashCode, isEmpty, size, sort, subCollection, toArray, toArray

Methods inherited from class Object

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

Constructor Detail

ReTypingFeatureCollection

public ReTypingFeatureCollection(FeatureCollection<SimpleFeatureType,SimpleFeature> delegate,
                                 SimpleFeatureType featureType)

ReTypingFeatureCollection

public ReTypingFeatureCollection(SimpleFeatureCollection delegate,
                                 SimpleFeatureType featureType)

Method Detail

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

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.

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

isTypeCompatible

public static boolean isTypeCompatible(FeatureVisitor visitor,
                                       SimpleFeatureType featureType)

Checks if the visitor is accessing only properties available in the specified feature type, or as a special case, if it's a count visitor accessing no properties at all