001 //$HeadURL: $
002 /*---------------- FILE HEADER ------------------------------------------
003 This file is part of deegree.
004 Copyright (C) 2001-2008 by:
005 Department of Geography, University of Bonn
006 http://www.giub.uni-bonn.de/deegree/
007 lat/lon GmbH
008 http://www.lat-lon.de
009
010 This library is free software; you can redistribute it and/or
011 modify it under the terms of the GNU Lesser General Public
012 License as published by the Free Software Foundation; either
013 version 2.1 of the License, or (at your option) any later version.
014 This library is distributed in the hope that it will be useful,
015 but WITHOUT ANY WARRANTY; without even the implied warranty of
016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017 Lesser General Public License for more details.
018 You should have received a copy of the GNU Lesser General Public
019 License along with this library; if not, write to the Free Software
020 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
021 Contact:
022
023 Andreas Poth
024 lat/lon GmbH
025 Aennchenstr. 19
026 53177 Bonn
027 Germany
028 E-Mail: poth@lat-lon.de
029
030 Prof. Dr. Klaus Greve
031 Department of Geography
032 University of Bonn
033 Meckenheimer Allee 166
034 53115 Bonn
035 Germany
036 E-Mail: greve@giub.uni-bonn.de
037 ---------------------------------------------------------------------------*/
038
039 package org.deegree.crs.transformations;
040
041 import java.util.ArrayList;
042 import java.util.List;
043
044 import javax.vecmath.Point2d;
045 import javax.vecmath.Point3d;
046
047 import org.deegree.crs.coordinatesystems.ProjectedCRS;
048 import org.deegree.crs.exceptions.CRSException;
049 import org.deegree.crs.projections.Projection;
050
051 /**
052 * The <code>ProjectionTransform</code> class wraps the access to a projection, by calling it's doProjection.
053 *
054 * @author <a href="mailto:bezema@lat-lon.de">Rutger Bezema</a>
055 *
056 * @author last edited by: $Author:$
057 *
058 * @version $Revision:$, $Date:$
059 *
060 */
061
062 public class ProjectionTransform extends CRSTransformation {
063
064 private Projection projection;
065
066 /**
067 * @param projectedCRS
068 * The crs containing a projection.
069 * @param identifier
070 * @param version
071 * @param description
072 * @param areaOfUse
073 */
074 public ProjectionTransform( ProjectedCRS projectedCRS, String identifier, String version, String description,
075 String areaOfUse ) {
076 super( projectedCRS.getGeographicCRS(),
077 projectedCRS,
078 identifier,
079 "Projection-Transform",
080 version,
081 description,
082 areaOfUse );
083 this.projection = projectedCRS.getProjection();
084 }
085
086 /**
087 * @param projectedCRS
088 * The crs containing a projection.
089 * @param identifier
090 */
091 public ProjectionTransform( ProjectedCRS projectedCRS, String identifier ) {
092 this( projectedCRS, identifier, "Unknown", "Unknown", "Unknown" );
093 }
094
095 /**
096 * A projectiontransform with an id set to FROM_geoID_TO_projId
097 *
098 * @param projectedCRS
099 * The crs containing a projection.
100 *
101 */
102 public ProjectionTransform( ProjectedCRS projectedCRS ) {
103 this( projectedCRS, new StringBuilder( "FROM_" ).append( projectedCRS.getGeographicCRS().getIdentifier() )
104 .append( "_TO_" )
105 .append( projectedCRS.getIdentifier() )
106 .toString() );
107 }
108
109 @Override
110 public List<Point3d> doTransform( List<Point3d> srcPts ) {
111 List<Point3d> result = new ArrayList<Point3d>( srcPts.size() );
112 if ( isInverseTransform() ) {
113 // System.out.println( "An inverse projection transform with incoming points: " + srcPts
114 // + " and following projection: "
115 // + projection.getIdAndName() );
116 for ( Point3d p : srcPts ) {
117 try {
118 Point2d tmp = projection.doInverseProjection( p.x, p.y );
119 result.add( new Point3d( tmp.x, tmp.y, p.z ) );
120 } catch ( CRSException e ) {
121 e.printStackTrace();
122 }
123 }
124 } else {
125 // System.out.println( "A projection transform with incoming points: " + srcPts
126 // + " and following projection: "
127 // + projection.getIdAndName() );
128 for ( Point3d p : srcPts ) {
129 try {
130 Point2d tmp = projection.doProjection( p.x, p.y );
131 result.add( new Point3d( tmp.x, tmp.y, p.z ) );
132 } catch ( CRSException e ) {
133 e.printStackTrace();
134 }
135 }
136 }
137 return result;
138 }
139
140 @Override
141 public boolean isIdentity() {
142 // a projection cannot be an identity doesn't make a lot of sense.
143 return false;
144 }
145
146 @Override
147 public String toString(){
148 String tmp = super.toString();
149 tmp += "Projection: " + projection.getName();
150 return tmp;
151 }
152
153 }