001 // $HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/ogcbase/GMLDocument.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 package org.deegree.ogcbase;
037
038 import java.net.URI;
039 import java.net.URISyntaxException;
040 import java.util.Calendar;
041
042 import org.deegree.datatypes.time.TimeIndeterminateValue;
043 import org.deegree.datatypes.time.TimePosition;
044 import org.deegree.framework.util.StringTools;
045 import org.deegree.framework.util.TimeTools;
046 import org.deegree.framework.xml.ElementList;
047 import org.deegree.framework.xml.XMLFragment;
048 import org.deegree.framework.xml.XMLParsingException;
049 import org.deegree.framework.xml.XMLTools;
050 import org.deegree.model.coverage.grid.Grid;
051 import org.deegree.model.crs.CRSFactory;
052 import org.deegree.model.crs.CoordinateSystem;
053 import org.deegree.model.crs.UnknownCRSException;
054 import org.deegree.model.spatialschema.Envelope;
055 import org.deegree.model.spatialschema.GeometryFactory;
056 import org.deegree.model.spatialschema.Point;
057 import org.deegree.model.spatialschema.Position;
058 import org.w3c.dom.Element;
059
060 /**
061 *
062 *
063 * @version $Revision: 24395 $
064 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
065 * @author last edited by: $Author: apoth $
066 *
067 * @version 1.0. $Revision: 24395 $, $Date: 2010-05-17 09:34:13 +0200 (Mo, 17 Mai 2010) $
068 *
069 * @since 1.1
070 */
071 public class GMLDocument extends XMLFragment {
072
073 private static final long serialVersionUID = -4974669697699282588L;
074
075 private static URI GMLNS = CommonNamespaces.GMLNS;
076
077 /**
078 * creates a <tt>Point</tt> from the passed <pos> element containing a GML pos.
079 *
080 * @param element
081 * @return created <tt>Point</tt>
082 * @throws InvalidGMLException
083 */
084 public static Point parsePos( Element element )
085 throws InvalidGMLException {
086 String tmp = XMLTools.getAttrValue( element, null, "dimension", null );
087 int dim = 0;
088 if ( tmp != null ) {
089 dim = Integer.parseInt( tmp );
090 }
091 tmp = XMLTools.getStringValue( element );
092 double[] vals = StringTools.toArrayDouble( tmp, ", " );
093 if ( dim != 0 ) {
094 if ( vals.length != dim ) {
095 throw new InvalidGMLException( "dimension must be equal to the number of "
096 + "coordinate values defined in pos element." );
097 }
098 } else {
099 dim = vals.length;
100 }
101
102 Position pos = null;
103 if ( dim == 3 ) {
104 pos = GeometryFactory.createPosition( vals[0], vals[1], vals[2] );
105 } else {
106 pos = GeometryFactory.createPosition( vals[0], vals[1] );
107 }
108
109 return GeometryFactory.createPoint( pos, null );
110 }
111
112 /**
113 * creates a <tt>Envelope</tt> from the passed element. Because deegree geometry implementation doesn't use CRS for
114 * envelopes the srsName attribute of the passed element is ignored.
115 *
116 * @param element
117 * @return created <tt>Envelope</tt>
118 * @throws InvalidGMLException
119 * @throws UnknownCRSException
120 */
121 public static Envelope parseEnvelope( Element element )
122 throws InvalidGMLException, UnknownCRSException {
123
124 String srs = XMLTools.getAttrValue( element, null, "srsName", null );
125 CoordinateSystem crs = null;
126 if ( srs != null ) {
127 crs = CRSFactory.create( srs );
128 }
129
130 ElementList el = XMLTools.getChildElements( "pos", GMLNS, element );
131 if ( el == null || el.getLength() != 2 ) {
132 throw new InvalidGMLException( "A lonLatEnvelope must contain two gml:pos elements" );
133 }
134 Point min = parsePos( el.item( 0 ) );
135 Point max = parsePos( el.item( 1 ) );
136
137 return GeometryFactory.createEnvelope( min.getPosition(), max.getPosition(), crs );
138 }
139
140 /**
141 * creates a <tt>TimePosition</tt> object from the passed element.
142 *
143 * @param element
144 * @return created <tt>TimePosition</tt>
145 * @throws XMLParsingException
146 * @throws InvalidGMLException
147 */
148 public static TimePosition parseTimePosition( Element element )
149 throws XMLParsingException, InvalidGMLException {
150 try {
151 String calendarEraName = XMLTools.getAttrValue( element, null, "calendarEraName", null );
152 String s = XMLTools.getAttrValue( element, null, "frame", null );
153 URI frame = null;
154 if ( s != null ) {
155 frame = new URI( s );
156 }
157 String indeterminatePosition = XMLTools.getAttrValue( element, null, "indeterminatePosition", null );
158 TimeIndeterminateValue tiv = new TimeIndeterminateValue( indeterminatePosition );
159 String tmp = XMLTools.getStringValue( element );
160 Calendar cal = null;
161
162 if ( frame != null && !frame.toString().equals( "#ISO-8601" ) ) {
163 throw new InvalidGMLException( "just #ISO-8601 is supported as frame for TimePosition." );
164 }
165
166 cal = TimeTools.createCalendar( tmp );
167
168 return new TimePosition( tiv, calendarEraName, frame, cal );
169 } catch ( URISyntaxException e ) {
170 throw new XMLParsingException( "couldn't parse timePosition frame\n" + StringTools.stackTraceToString( e ) );
171 }
172 }
173
174 /**
175 * creates a <tt>Grid</tt> instance from the passed <tt>Element</tt>
176 *
177 * @param element
178 * @return instance of <tt>Grid</tt>
179 * @throws InvalidGMLException
180 */
181 public static Grid parseGrid( Element element )
182 throws InvalidGMLException {
183 Grid grid = null;
184 try {
185 String path = "gml:limits/gml:GridEnvelope/gml:low";
186 String lo = XMLTools.getRequiredNodeAsString( element, path, nsContext );
187 double[] low = StringTools.toArrayDouble( lo, " ,;" );
188 path = "gml:limits/gml:GridEnvelope/gml:high";
189 String hi = XMLTools.getRequiredNodeAsString( element, path, nsContext );
190 double[] high = StringTools.toArrayDouble( hi, " ,;" );
191 Position posLo = GeometryFactory.createPosition( low );
192 Position posHi = GeometryFactory.createPosition( high );
193 Envelope env = GeometryFactory.createEnvelope( posLo, posHi, null );
194 String[] axis = XMLTools.getNodesAsStrings( element, "axisName/text()", nsContext );
195 grid = new Grid( env, axis );
196 } catch ( Exception e ) {
197 throw new InvalidGMLException( e.getMessage() );
198 }
199 return grid;
200 }
201
202 }