org.deegree.feature.persistence.query
Class CombinedResultSet

java.lang.Object
  org.deegree.feature.persistence.query.CombinedResultSet

All Implemented Interfaces:

java.lang.Iterable<Feature>, FeatureResultSet

public class CombinedResultSet
extends java.lang.Object
implements FeatureResultSet

ResultSet that encapsulates a sequence of ResultSets.

Version:

$Revision: 23635 $, $Date: 2010-04-15 17:38:43 +0200 (Do, 15. Apr 2010) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

Constructor Summary

CombinedResultSet(java.util.Iterator<FeatureResultSet> resultSetIter)
Creates a new CombinedResultSet that is backed by the given FeatureResultSet.

Method Summary

void	close() Must be invoked after using to close underlying resources, e.g.
java.util.Iterator<Feature>	iterator()
FeatureCollection	toCollection() Returns all members of the FeatureResultSet as a FeatureCollection.

Methods inherited from class java.lang.Object

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

Constructor Detail

CombinedResultSet

public CombinedResultSet(java.util.Iterator<FeatureResultSet> resultSetIter)

Creates a new CombinedResultSet that is backed by the given FeatureResultSet.

Parameters:

resultSetIter - FeatureResultSet to back the result set, must not be null

Method Detail

close

public void close()

Description copied from interface: FeatureResultSet

Must be invoked after using to close underlying resources, e.g. SQL ResultSets.

Specified by:

close in interface FeatureResultSet

toCollection

public FeatureCollection toCollection()

Description copied from interface: FeatureResultSet

Returns all members of the FeatureResultSet as a FeatureCollection.

NOTE: This method should not be called for very large result sets, as it introduces the overhead of keeping all created feature instances in memory. The returned collection will contain all Features instances from the current position in the iteration sequence.

Specified by:

toCollection in interface FeatureResultSet

Returns:

members as feature collection, never null

iterator

public java.util.Iterator<Feature> iterator()

Specified by:

iterator in interface java.lang.Iterable<Feature>