// $Id$
/*---------------- 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
53115 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.framework.util;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import javax.servlet.ServletContext;
import org.deegree.framework.log.ILogger;
public class WebappResourceResolver {
/**
* 'Heuristical' method to retrieve the <code>URL</code> for a file referenced from an
* init-param of a webapp config file which may be:
* <ul>
* <li>a (absolute) <code>URL</code></li>
* <li>a file location</li>
* <li>a (relative) URL which in turn is resolved using <code>ServletContext.getRealPath</code>
* </li>
* </ul>
*
* @param location
* @param context
* @param log the log with which erros will be logged. cannot be null
* @return
* @throws MalformedURLException
*/
public static URL resolveFileLocation( String location, ServletContext context, ILogger log )
throws MalformedURLException {
URL serviceConfigurationURL = null;
log.logDebug( "Resolving configuration file location: '"
+ location + "'..." );
try {
serviceConfigurationURL = new URL( location );
} catch (MalformedURLException e) {
log.logDebug( "No valid (absolute) URL. Trying context.getRealPath() now." );
String realPath = context.getRealPath( location );
if ( realPath == null ) {
log.logDebug( "No 'real path' available. Trying to parse as a file location now." );
serviceConfigurationURL = new File( location ).toURL();
} else {
try {
// realPath may either be a URL or a File
serviceConfigurationURL = new URL( realPath );
} catch (MalformedURLException e2) {
log.logDebug( "'Real path' cannot be parsed as URL. "
+ "Trying to parse as a file location now." );
serviceConfigurationURL = new File( realPath ).toURL();
}
}
}
return serviceConfigurationURL;
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log$
Revision 1.7 2006/08/29 19:54:14 poth
footer corrected
Revision 1.6 2006/07/12 14:46:17 poth
comment footer added
********************************************************************** */