/* * GeoTools - The Open Source Java GIS Toolkit * http://geotools.org * * (C) 2005-2008, Open Source Geospatial Foundation (OSGeo) * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. */ package org.geotools.feature.collection; import java.io.IOException; import java.util.Iterator; import java.util.List; import org.geotools.data.DataUtilities; import org.geotools.data.FeatureReader; import org.geotools.data.collection.DelegateFeatureReader; import org.geotools.data.simple.SimpleFeatureCollection; import org.geotools.data.simple.SimpleFeatureIterator; import org.geotools.factory.CommonFactoryFinder; import org.geotools.feature.FeatureIterator; import org.geotools.feature.visitor.BoundsVisitor; import org.geotools.geometry.jts.ReferencedEnvelope; import org.geotools.util.NullProgressListener; import org.opengis.feature.simple.SimpleFeature; import org.opengis.feature.simple.SimpleFeatureType; import org.opengis.filter.Filter; import org.opengis.filter.FilterFactory; import org.opengis.filter.sort.SortBy; /** * Used as a reasonable default implementation for subCollection. *
* Note: to implementors, this is not optimal, please do your own * thing - your users will thank you. *
* * @author Jody Garnett, Refractions Research, Inc. * * * * @source $URL$ */ public class SubFeatureCollection extends AbstractFeatureCollection { /** Filter */ protected Filter filter; /** Original Collection */ protected SimpleFeatureCollection collection; protected FilterFactory ff = CommonFactoryFinder.getFilterFactory( null ); public SubFeatureCollection(SimpleFeatureCollection collection ) { this( collection, Filter.INCLUDE ); } public SubFeatureCollection(SimpleFeatureCollection collection, Filter subfilter ){ super( collection.getSchema() ); if (subfilter == null ) subfilter = Filter.INCLUDE; if (subfilter.equals(Filter.EXCLUDE)) { throw new IllegalArgumentException("A subcollection with Filter.EXCLUDE would be empty"); } if( collection instanceof SubFeatureCollection){ SubFeatureCollection filtered = (SubFeatureCollection) collection; if( subfilter.equals(Filter.INCLUDE)){ this.collection = filtered.collection; this.filter = filtered.filter(); } else { this.collection = filtered.collection; this.filter = ff.and( filtered.filter(), subfilter ); } } else { this.collection = collection; this.filter = subfilter; } } public Iterator openIterator() { return new FilteredIterator