/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 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.data.ws;
import java.io.IOException;
import java.util.logging.Logger;
import org.geotools.data.Query;
import org.geotools.data.complex.xml.XmlFeatureCollection;
import org.geotools.data.complex.xml.XmlResponse;
import org.geotools.data.store.DataFeatureCollection;
import org.geotools.feature.FeatureCollection;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.util.logging.Logging;
import org.opengis.feature.simple.SimpleFeatureType;
/**
* A {@link FeatureCollection} whose iterators are based on the FeatureReaders returned by a
* {@link XmlDataStore}.
*
* @author rpetty
* @version $Id$
* @since 2.5.x
* @source $URL:
* http://svn.geotools.org/trunk/modules/unsupported/app-schema/webservice/src/main/java/org/geotools/wfs/v_1_1_0
* /data/XmlSimpleFeatureParser.java $
*/
public class WSFeatureCollection extends DataFeatureCollection implements XmlFeatureCollection {
private static final Logger LOGGER = Logging.getLogger("org.geotools.data.ws");
private Query query;
private XmlDataStore dataStore;
private XmlResponse xmlResponse;
/**
* Cached size so multiple calls to {@link #getCount()} does not require multiple server calls
*/
private int cachedSize = -1;
/**
* @param dataStore
* @param query
* properly named query
* @throws IOException
*/
public WSFeatureCollection(XmlDataStore dataStore, Query query) throws IOException {
this.dataStore = dataStore;
this.query = query;
}
@Override
public SimpleFeatureType getSchema() {
throw new UnsupportedOperationException("No schema for WS!");
}
/**
* Calculates and returns the aggregated bounds of the collection contents, potentially doing a
* full scan.
* <p>
* As a bonuns, if a full scan needs to be done updates the cached collection size so a future
* call to {@link #getCount()} does not require an extra server call.
* </p>
*/
@Override
public ReferencedEnvelope getBounds() {
throw new UnsupportedOperationException("No bounds for WS!");
}
/**
* Calculates the feature collection size, doing a full scan if needed.
* <p>
* <b>WARN</b>: this method could be very inefficient if the size cannot be efficiently
* calculated. That is, it is not cached and {@link XmlDataStore#getCount(Query)} returns
* {@code -1}.
* </p>
*
* @return the FeatureCollection<SimpleFeatureType, SimpleFeature> size.
* @see DataFeatureCollection#getCount()
*/
@Override
public int getCount() throws IOException {
if (cachedSize != -1) {
return cachedSize;
}
cachedSize = dataStore.getCount(query);
if (cachedSize == -1) {
// no luck, cache both bounds and count with a full scan
getBounds();
}
return cachedSize;
}
public XmlResponse xmlResponse() {
try {
xmlResponse = dataStore.getXmlReader(query);
} catch (IOException e) {
throw new RuntimeException(e);
}
return xmlResponse;
}
}