/* 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.vfny.geoserver.wms.requests.readers;
import java.io.Reader;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.geoserver.wms.WMS;
import org.geotools.filter.FilterFilter;
import org.geotools.gml.GMLFilterDocument;
import org.geotools.gml.GMLFilterGeometry;
import org.opengis.filter.Filter;
import org.vfny.geoserver.util.requests.FilterHandlerImpl;
import org.vfny.geoserver.util.requests.readers.XmlRequestReader;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.ParserAdapter;
public abstract class WmsXmlRequestReader extends XmlRequestReader {
/**
* Constructs the new wfs xml reader.
*
* @param service Reference to the service handing a reuqest.
*/
public WmsXmlRequestReader(WMS wms) {
super(wms.getServiceInfo());
}
/**
* Reads the Filter XML request into a geotools Feature object.
*
* @param rawRequest The plain POST text from the client.
*
* @return The geotools filter constructed from rawRequest.
*
* @throws WfsException For any problems reading the request.
*/
public static Filter readFilter(Reader rawRequest)
throws Exception {
// translate string into a proper SAX input source
InputSource requestSource = new InputSource(rawRequest);
// instantiante parsers and content handlers
FilterHandlerImpl contentHandler = new FilterHandlerImpl();
FilterFilter filterParser = new FilterFilter(contentHandler, null);
GMLFilterGeometry geometryFilter = new GMLFilterGeometry(filterParser);
GMLFilterDocument documentFilter = new GMLFilterDocument(geometryFilter);
// read in XML file and parse to content handler
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
ParserAdapter adapter = new ParserAdapter(parser.getParser());
adapter.setContentHandler(documentFilter);
adapter.parse(requestSource);
LOGGER.fine("just parsed: " + requestSource);
LOGGER.fine("passing filter: " + contentHandler.getFilter());
return contentHandler.getFilter();
}
}