/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.geoserver.wfs.kvp;
import com.vividsolutions.jts.geom.Envelope;
import org.geoserver.ows.KvpParser;
import org.geoserver.ows.util.KvpUtils;
import org.geoserver.platform.ServiceException;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.referencing.CRS;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import java.util.List;
public class BBoxKvpParser extends KvpParser {
public BBoxKvpParser() {
super("bbox", Envelope.class);
}
public Object parse(String value) throws Exception {
List unparsed = KvpUtils.readFlat(value, KvpUtils.INNER_DELIMETER);
// check to make sure that the bounding box has 4 coordinates
if (unparsed.size() < 4) {
throw new IllegalArgumentException("Requested bounding box contains wrong"
+ "number of coordinates (should have " + "4): " + unparsed.size());
}
//if it does, store them in an array of doubles
double[] bbox = new double[4];
for (int i = 0; i < 4; i++) {
try {
bbox[i] = Double.parseDouble((String) unparsed.get(i));
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Bounding box coordinate " + i
+ " is not parsable:" + unparsed.get(i));
}
}
//ensure the values are sane
double minx = bbox[0];
double miny = bbox[1];
double maxx = bbox[2];
double maxy = bbox[3];
if (minx > maxx) {
throw new ServiceException("illegal bbox, minX: " + minx + " is "
+ "greater than maxX: " + maxx);
}
if (miny > maxy) {
throw new ServiceException("illegal bbox, minY: " + miny + " is "
+ "greater than maxY: " + maxy);
}
//check for crs
CoordinateReferenceSystem crs = null;
if (unparsed.size() > 4) {
crs = CRS.decode((String) unparsed.get(4));
} else {
//TODO: use the default crs of the system
}
return new ReferencedEnvelope(minx,maxx,miny,maxy,crs);
}
}