/* 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.wcs.responses;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.logging.Logger;
import javax.xml.transform.TransformerException;
import org.geoserver.config.GeoServer;
import org.geoserver.config.GeoServerInfo;
import org.geoserver.config.ServiceInfo;
import org.geoserver.platform.ServiceException;
import org.springframework.context.ApplicationContext;
import org.vfny.geoserver.Request;
import org.vfny.geoserver.Response;
import org.vfny.geoserver.util.requests.CapabilitiesRequest;
import org.vfny.geoserver.wcs.WcsException;
import org.vfny.geoserver.wcs.WcsException.WcsExceptionCode;
/**
* DOCUMENT ME!
*
* @author $Author: Alessio Fabiani (alessio.fabiani@gmail.com) $ (last
* modification)
* @author $Author: Simone Giannecchini (simboss1@gmail.com) $ (last
* modification)
*/
public class WCSCapabilitiesResponse implements Response {
/** package's logger */
private static final Logger LOGGER = org.geotools.util.logging.Logging.getLogger(WCSCapabilitiesResponse.class.getPackage()
.getName());
/**
* Byte array holding the raw content of the capabilities document,
* generated in <code>execute()</code>
*/
private byte[] rawResponse;
private ApplicationContext applicationContext;
public WCSCapabilitiesResponse(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
/**
* Returns any extra headers that this service might want to set in the HTTP response object.
* @see org.vfny.geoserver.Response#getResponseHeaders()
*/
public HashMap getResponseHeaders() {
return null;
}
/**
* DOCUMENT ME!
*
* @param request
* DOCUMENT ME!
*
* @throws ServiceException
* DOCUMENT ME!
* @throws IllegalArgumentException
* DOCUMENT ME!
* @throws WCSException
* DOCUMENT ME!
*/
public void execute(Request request) throws ServiceException {
if (!(request instanceof CapabilitiesRequest)) {
throw new IllegalArgumentException("Not a GetCapabilities Request");
}
CapabilitiesRequest capreq = (CapabilitiesRequest)request;
long reqUS = -1;
if (capreq.getUpdateSequence() != null) {
try {
reqUS = Long.parseLong(capreq.getUpdateSequence());
} catch (NumberFormatException nfe) {
throw new ServiceException("GeoServer only accepts numbers in the updateSequence parameter");
}
}
GeoServerInfo gsInfo = request.getServiceConfig().getGeoServer().getGlobal();
long geoUS = gsInfo.getUpdateSequence();
if (reqUS > geoUS) {
throw new WcsException("Client supplied an updateSequence that is greater than the current sever updateSequence", WcsExceptionCode.InvalidUpdateSequence, "");
}
if (reqUS == geoUS) {
throw new WcsException("WCS capabilities document is current (updateSequence = " + geoUS + ")", WcsExceptionCode.CurrentUpdateSequence, "");
}
//otherwise it's a normal response...
WCSCapsTransformer transformer = new WCSCapsTransformer(request
.getBaseUrl(), applicationContext);
transformer.setIndentation(2);
transformer.setEncoding(Charset.forName(gsInfo.getCharset()));
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
transformer.transform(request, out);
} catch (TransformerException e) {
throw new WcsException(e);
}
this.rawResponse = out.toByteArray();
}
/**
* Returns the fixed capabilities MIME type (application/vnd.ogc.WCS_xml) as
* specified in whe WCS spec, version 1.1.1, section 6.5.3, table 3.
*
* @param gs
* DOCUMENT ME!
*
* @return the capabilities document MIME type.
*
* @throws IllegalStateException
* if the response was not yet produced.
*/
public String getContentType(GeoServer gs) throws IllegalStateException {
if (rawResponse == null) {
throw new IllegalStateException("execute() not called or not succeed.");
}
return "text/xml; charset=" + gs.getGlobal().getCharset();
}
/**
* Just returns <code>null</code>, since no special encoding is applyed
* to the output data.
*
* @return <code>null</code>
*/
public String getContentEncoding() {
return null;
}
/**
* Just returns <code>null</code>, since no special encoding is applyed
* to the output data.
*
* @return <code>null</code>
*/
public String getContentDisposition() {
return null;
}
/**
* Writes the capabilities document generated in <code>execute()</code> to
* the given output stream.
*
* @param out
* the capabilities document destination
*
* @throws ServiceException
* never, since the whole content was aquired in
* <code>execute()</code>
* @throws IOException
* if it is thrown while writing to <code>out</code>
* @throws IllegalStateException
* if <code>execute()</code> was not called/succeed before
* this method is called.
*/
public void writeTo(OutputStream out) throws ServiceException, IOException {
if (rawResponse == null) {
throw new IllegalStateException("execute() not called or not succeed.");
}
out.write(rawResponse);
}
/**
* Does nothing, since no processing is done after <code>execute()</code>
* has returned.
*
* @param gs
* the service instance
*/
public void abort(ServiceInfo gs) {
}
}