001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/crs/configuration/resources/CRSResource.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036
037 package org.deegree.crs.configuration.resources;
038
039 import java.util.List;
040
041 import org.deegree.crs.coordinatesystems.CoordinateSystem;
042 import org.deegree.crs.coordinatesystems.GeographicCRS;
043 import org.deegree.crs.transformations.Transformation;
044 import org.deegree.crs.transformations.helmert.Helmert;
045 import org.deegree.framework.xml.XLinkResolver;
046
047 /**
048 * The <code>GMLResource</code> class defines the access to a resource containing GML crs definitions, often a
049 * dictionary file or a database.
050 *
051 * @author <a href="mailto:bezema@lat-lon.de">Rutger Bezema</a>
052 *
053 * @author last edited by: $Author: lbuesching $
054 *
055 * @version $Revision: 27765 $, $Date: 2010-11-04 07:50:32 +0100 (Do, 04 Nov 2010) $
056 * @param <T>
057 * of the resource
058 *
059 */
060 public interface CRSResource<T> extends XLinkResolver<T> {
061
062 /**
063 * Implementations should find the helmert transformation which transforms coordinates of the geodetic datum into
064 * coordinates of the WGS84 datum. If no such transformation could be found, the implementation should return
065 * <code>null</code>
066 *
067 * @param sourceCRS
068 * to retrieve the transformation for.
069 * @return the {@link Helmert} transformation or <code>null</code> if no such transformation was defined.
070 */
071 public abstract Helmert getWGS84Transformation( GeographicCRS sourceCRS );
072
073 /**
074 * Implementations should find a given transformation (chain) which transforms coordinates of the given coordinate
075 * system into coordinates of the target crs. If no such transformation could be found, the implementation should
076 * return <code>null</code>
077 *
078 * @param sourceCRS
079 * start point of the transformation.
080 * @param targetCRS
081 * end point of the transformations
082 * @return the {@link Transformation} or <code>null</code> if no such transformation was defined.
083 */
084 public abstract Transformation getTransformation( CoordinateSystem sourceCRS, CoordinateSystem targetCRS );
085
086 /**
087 *
088 * @return a list of all available transformations
089 */
090 public abstract List<Transformation> getTransformations();
091
092 }