org.deegree.feature.persistence.query
Class CombinedResultSet

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

All Implemented Interfaces:

Iterable<Feature>, FeatureResultSet

public class CombinedResultSet
extends Object
implements FeatureResultSet

ResultSet that encapsulates a sequence of ResultSets.

Version:

$Revision: 22129 $, $Date: 2010-01-21 19:03:13 +0100 (Do, 21 Jan 2010) $

Author:

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

Field Summary

(package private) FeatureResultSet	currentResultSet
(package private) boolean	lastClosed
(package private) Iterator<FeatureResultSet>	resultSetIter

Constructor Summary

CombinedResultSet(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.
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

Field Detail

resultSetIter

Iterator<FeatureResultSet> resultSetIter

currentResultSet

FeatureResultSet currentResultSet

lastClosed

boolean lastClosed

Constructor Detail

CombinedResultSet

public CombinedResultSet(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 Iterator<Feature> iterator()

Specified by:

iterator in interface Iterable<Feature>