/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
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; either
version 2.1 of the License, or (at your option) any later version.
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.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53177 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.portal.portlet.enterprise;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.deegree.enterprise.control.AbstractListener;
import org.deegree.enterprise.control.FormEvent;
import org.deegree.enterprise.control.RPCStruct;
import org.deegree.enterprise.control.RPCWebEvent;
import org.deegree.framework.log.ILogger;
import org.deegree.framework.log.LoggerFactory;
import org.deegree.framework.util.StringTools;
import org.deegree.ogcbase.ImageURL;
import org.deegree.ogcwebservices.getcapabilities.InvalidCapabilitiesException;
import org.deegree.ogcwebservices.wms.capabilities.LegendURL;
import org.deegree.ogcwebservices.wms.capabilities.WMSCapabilities;
import org.deegree.ogcwebservices.wms.capabilities.WMSCapabilitiesDocument;
import org.deegree.portal.PortalException;
import org.deegree.portal.context.ContextException;
import org.deegree.portal.context.Format;
import org.deegree.portal.context.FormatList;
import org.deegree.portal.context.Layer;
import org.deegree.portal.context.Server;
import org.deegree.portal.context.Style;
import org.deegree.portal.context.StyleList;
import org.deegree.portal.context.ViewContext;
import org.deegree.portal.standard.wms.control.GetWMSLayerListener;
/**
*
*
*
* @version $Revision: 1.6 $
* @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
* @author last edited by: $Author: poth $
*
* @version 1.0. $Revision: 1.6 $, $Date: 2006/08/20 20:53:54 $
*
* @since 2.0
*/
public class AddWMSListener extends AbstractListener {
private static ILogger LOG = LoggerFactory.getLogger( GetWMSLayerListener.class );
/**
* @see org.deegree.enterprise.control.WebListener#actionPerformed(org.deegree.enterprise.control.FormEvent)
*/
public void actionPerformed( FormEvent event ) {
RPCWebEvent rpc = (RPCWebEvent) event;
try {
validate( rpc );
} catch ( Exception e ) {
gotoErrorPage( "Not a valid RPC for AddWMSListener\n" + e.getMessage() );
}
HttpSession session = ( (HttpServletRequest) this.getRequest() ).getSession();
Enumeration en = session.getAttributeNames();
try {
while ( en.hasMoreElements() ) {
String key = (String) en.nextElement();
Object o = session.getAttribute( key );
if ( o != null && o instanceof ViewContext ) {
appendWMS( rpc, (ViewContext) o );
}
}
} catch ( Exception e ) {
LOG.logError( e.getMessage(), e );
e.printStackTrace();
}
}
/**
* appends the selected layers of a WMS to the passed <code>ViewContext</code>
*
* @param context
* @throws ContextException
* @throws MalformedURLException
* @throws PortalException
* @throws InvalidCapabilitiesException
*/
private void appendWMS( RPCWebEvent rpc, ViewContext context )
throws MalformedURLException, ContextException, PortalException,
InvalidCapabilitiesException {
RPCStruct struct = (RPCStruct) rpc.getRPCMethodCall().getParameters()[0].getValue();
URL url = new URL( (String) struct.getMember( "WMSURL" ).getValue() );
String name = (String) struct.getMember( "WMSNAME" ).getValue();
String version = (String) struct.getMember( "WMSVERSION" ).getValue();
String layers = (String) struct.getMember( "LAYERS" ).getValue();
String formatName = (String) struct.getMember( "FORMAT" ).getValue();
List<String> list = StringTools.toList( layers, ";", true );
WMSCapabilitiesDocument capa = new WMSCapabilitiesDocument();
try {
capa.load( new URL( url.toExternalForm() + "?request=GetCapabilities&service=WMS" ) );
} catch ( Exception e ) {
LOG.logError( e.getMessage(), e );
throw new PortalException( "could not load WMS capabilities from: " +
new URL( url.toExternalForm() +
"?request=GetCapabilities&service=WMS" ) +
"; reason: " + e.getMessage() );
}
WMSCapabilities capalilities = (WMSCapabilities) capa.parseCapabilities();
Layer layer = context.getLayerList().getLayers()[0];
for ( int i = 0; i < list.size(); i++ ) {
String[] lay = StringTools.toArray( list.get( i ), "|", false );
Server server = new Server( name, version, "OGC:WMS", url, capalilities );
String srs = context.getGeneral().getBoundingBox()[0].getCoordinateSystem().getAsString();
Format format = new Format( formatName, true );
FormatList fl = new FormatList( new Format[] { format } );
// read available styles from WMS capabilities and add them
// to the WMC layer
org.deegree.ogcwebservices.wms.capabilities.Layer wmslay = capalilities.getLayer( lay[0] );
org.deegree.ogcwebservices.wms.capabilities.Style[] wmsstyles = wmslay.getStyles();
Style[] styles = null;
if ( wmsstyles == null || wmsstyles.length == 0 ) {
// a wms capabilities layer may offeres one or more styles for
// a layer but it don't have to. But WMC must have at least one
// style for each layer; So we set a default style in the case
// a wms does not declares one
styles = new Style[1];
styles[0] = new Style( "", "default", "", null, true );
} else {
styles = new Style[wmsstyles.length];
for ( int j = 0; j < styles.length; j++ ) {
boolean isDefault = wmsstyles[j].getName().toLowerCase().indexOf( "default" ) > -1 ||
wmsstyles[j].getName().trim().length() == 0;
ImageURL legendURL = null;
LegendURL[] lUrl = wmsstyles[j].getLegendURL();
if ( lUrl != null && lUrl.length > 0 ) {
legendURL = new ImageURL( lUrl[0].getWidth(), lUrl[0].getHeight(),
lUrl[0].getFormat(), lUrl[0].getOnlineResource() );
}
styles[j] = new Style( wmsstyles[j].getName(), wmsstyles[j].getTitle(),
wmsstyles[j].getAbstract(), legendURL, isDefault );
}
}
StyleList styleList = new StyleList( styles );
Layer newLay = new Layer( server, lay[0], lay[1], null, new String[] { srs }, null,
null, fl, styleList, true, false, layer.getExtension() );
context.getLayerList().addLayer( newLay );
}
}
/**
* validates the incomming RPC
* @param rpc
*/
private void validate( RPCWebEvent rpc ) {
// TODO Auto-generated method stub
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: AddWMSListener.java,v $
Revision 1.6 2006/08/20 20:53:54 poth
changes rquired as a consequence of bug fix in wmc implementation/handling. Instead of determining the correct URL as given in a services capabilities deegree always has used the base URL which is just guarenteed to be valid for GetCapabilities requests.
Revision 1.5 2006/06/09 15:17:21 poth
bug fix - handling layers with no style definition
Revision 1.4 2006/06/08 20:27:12 poth
bug fix - handling wms style elements with empty Name and Title element
Revision 1.3 2006/06/08 11:33:30 poth
*** empty log message ***
Revision 1.2 2006/05/21 12:01:15 poth
bug fix reading styles from WMS capabilities
********************************************************************** */