/*----------------    FILE HEADER  ------------------------------------------

 This file is part of deegree.
 Copyright (C) 2001-2005 by:
 EXSE, Department of Geography, University of Bonn
 http://www.giub.uni-bonn.de/exse/
 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
 Aennchenstraße 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.ogcwebservices.wps.describeprocess;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.deegree.datatypes.Code;
import org.deegree.framework.log.ILogger;
import org.deegree.framework.log.LoggerFactory;
import org.deegree.ogcwebservices.InvalidParameterValueException;
import org.deegree.ogcwebservices.OGCWebServiceException;
import org.deegree.ogcwebservices.wps.WPService;
import org.deegree.ogcwebservices.wps.configuration.WPSConfiguration;
import org.deegree.ogcwebservices.wps.execute.Process;

/**
 * DescribeProcessRequestHandler.java
 * 
 * Created on 10.03.2006. 12:06:58h
 * 
 * @author <a href="mailto:christian@kiehle.org">Christian Kiehle</a>
 * @author <a href="mailto:christian.heier@gmx.de">Christian Heier</a>
 * 
 * @version 1.0.
 * 
 * @since 2.0
 */

public class DescribeProcessRequestHandler {

	private static ILogger LOG = LoggerFactory.getLogger( DescribeProcessRequestHandler.class );

	private WPService wpService = null;

	/**
	 * 
	 * @param wpService
	 */
	public DescribeProcessRequestHandler( WPService wpService ) {
		this.wpService = wpService;
	}

	/**
	 * 
	 * @param describeProcessRequest
	 * @return
	 * @throws OGCWebServiceException
	 */
	public ProcessDescriptions handleRequest( DescribeProcessRequest describeProcessRequest )
			throws OGCWebServiceException {

		// Get configuration from current wps instance
		WPSConfiguration wpsConfiguration = wpService.getConfiguration();

		// Get the map of registered Processes from wps configuration
		Map<String, Process> processesMap = wpsConfiguration.getRegisteredProcesses();

		// Get list of requested process descriptions from
		// wpsDescribeProcessRequest
		List<Code> requestedProcessesList = describeProcessRequest.getIdentifier();

		// Prepare list of process description to return
		List<ProcessDescription> processDescriptionList = new ArrayList<ProcessDescription>();

		// If the requested process is registered in current wps instance add it
		// to
		// processDescriptions, otherwise throw exception
		int requestedProcessesSize = requestedProcessesList.size();
		for ( int i = 0; i < requestedProcessesSize; i++ ) {

			Code requestedProcess = requestedProcessesList.get( i );

			String identifier = requestedProcess.getCode().toUpperCase();

			if ( processesMap.containsKey( identifier ) ) {

				Process process = processesMap.get( identifier );

				ProcessDescription processDescription = process.getProcessDescription();
				processDescriptionList.add( i, processDescription );

			} else {
				String msg = "Process '" + identifier + "' is not supported by this WPS.";
				LOG.logError( msg );
				throw new InvalidParameterValueException( "Identifier", msg );
			}
		}
		return new ProcessDescriptions( processDescriptionList );
	}

}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: DescribeProcessRequestHandler.java,v $
Revision 1.3  2006/08/24 06:42:16  poth
File header corrected

Revision 1.2  2006/07/12 14:46:15  poth
comment footer added

********************************************************************** */