org.geotools.renderer.lite
Class IndexedFeatureResults

java.lang.Object
  org.geotools.renderer.lite.IndexedFeatureResults

All Implemented Interfaces:

FeatureResults

public class IndexedFeatureResults

extends java.lang.Object

implements FeatureResults

IndexedFeatureReader

Author:

wolf

Constructor Summary

IndexedFeatureResults(FeatureResults results)

Method Summary

FeatureCollection	collection() Convert this set of results to a FeatureCollection.
com.vividsolutions.jts.geom.Envelope	getBounds() Returns the bounding box of this FeatureResults.
int	getCount() Returns the number of Features in this FeatureResults.
FeatureType	getSchema() Returns the FeatureType of the contents of this collection.
FeatureReader	reader() Provides access to the Features, please note that FeatureReader is a blocking api.
FeatureReader	reader(com.vividsolutions.jts.geom.Envelope envelope)
void	setQueryBounds(com.vividsolutions.jts.geom.Envelope queryBounds)

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexedFeatureResults

public IndexedFeatureResults(FeatureResults results)
                      throws java.io.IOException,
                             IllegalAttributeException

Method Detail

getSchema

public FeatureType getSchema()
                      throws java.io.IOException

Description copied from interface: FeatureResults

Returns the FeatureType of the contents of this collection.

Please note that for a collection with a mixed contents the FeatureType may be degenerate (ie very generic). For many applications (like shapefiles or tables) the FeatureType can safely be used to describe all the Features in the result set.

Specified by:

getSchema in interface FeatureResults

Returns:

A FeatureType that describes the contents of this collection.

Throws:

java.io.IOException - if their is a problem getting the FeatureType.

See Also:

FeatureResults.getSchema()

reader

public FeatureReader reader(com.vividsolutions.jts.geom.Envelope envelope)
                     throws java.io.IOException

Throws:

java.io.IOException

See Also:

FeatureResults.reader()

getBounds

public com.vividsolutions.jts.geom.Envelope getBounds()

Description copied from interface: FeatureResults

Returns the bounding box of this FeatureResults.

This opperation may be expensive. Consider FeatureSource.getBounds( Query ) as an alternative.

This method is logically the same as:

 
 public Envelope getBounds() throws IOException {
     Envelope newBBox = new Envelope();
     Envelope internal;
     Feature feature;
 
     for (FeatureReader r = reader(); r.hasNext();) {
         feature = r.next();
         internal = feature.getDefaultGeometry().getEnvelopeInternal();
         newBBox.expandToInclude(internal);
     }
     return newBBox;  
 }
 
 

Specified by:

getBounds in interface FeatureResults

Returns:

Bounding box of this FeatureResults, or an empty Envelope

See Also:

FeatureResults.getBounds()

getCount

public int getCount()
             throws java.io.IOException

Description copied from interface: FeatureResults

Returns the number of Features in this FeatureResults.

This opperation may be expensive. Consider FeatureSource.getCount( Query ) as an alternative.

This method is logically the same as:

 
 public int getCount() throws IOException {
     int count = 0;
     for (FeatureReader r = reader(); r.hasNext(); count++) {
         r.next();
     }
     return count;  
 }
 
 

Specified by:

getCount in interface FeatureResults

Returns:

The number of Features in this FeatureResults.

Throws:

java.io.IOException - If there are problems getting the count

See Also:

FeatureResults.getCount()

collection

public FeatureCollection collection()
                             throws java.io.IOException

Description copied from interface: FeatureResults

Convert this set of results to a FeatureCollection.

This method is logically the same as:

 public FeatureCollection collection() throws IOException {
     FeatureCollection collection = FeatureCollections.newCollection()
     for (FeatureReader r = reader(); r.hasNext();) {
         collection.add( r.next() );
     }
     return collection;  
 }
 

Specified by:

collection in interface FeatureResults

Returns:

DOCUMENT ME!

Throws:

java.io.IOException - If any problems occur aquiring Features

See Also:

FeatureResults.collection()

reader

public FeatureReader reader()
                     throws java.io.IOException

Description copied from interface: FeatureResults

Provides access to the Features, please note that FeatureReader is a blocking api.

Specified by:

reader in interface FeatureResults

Returns:

A FeatureReader streaming over the FeatureResults

Throws:

java.io.IOException - DOCUMENT ME!

See Also:

FeatureResults.reader()

setQueryBounds

public void setQueryBounds(com.vividsolutions.jts.geom.Envelope queryBounds)

Returns: