001 // $HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_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: 18195 $
064 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
065 * @author last edited by: $Author: mschneider $
066 *
067 * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
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
114 * implementation doesn't use CRS for envelopes the srsName attribute of the passed element is
115 * ignored.
116 *
117 * @param element
118 * @return created <tt>Envelope</tt>
119 * @throws InvalidGMLException
120 * @throws UnknownCRSException
121 */
122 public static Envelope parseEnvelope( Element element )
123 throws InvalidGMLException, UnknownCRSException {
124
125 String srs = XMLTools.getAttrValue( element, null, "srsName", null );
126 CoordinateSystem crs = null;
127 if ( srs != null ) {
128 crs = CRSFactory.create( srs );
129 }
130
131 ElementList el = XMLTools.getChildElements( "pos", GMLNS, element );
132 if ( el == null || el.getLength() != 2 ) {
133 throw new InvalidGMLException( "A lonLatEnvelope must contain two gml:pos elements" );
134 }
135 Point min = parsePos( el.item( 0 ) );
136 Point max = parsePos( el.item( 1 ) );
137
138 return GeometryFactory.createEnvelope( min.getPosition(), max.getPosition(), crs );
139 }
140
141 /**
142 * creates a <tt>TimePosition</tt> object from the passed element.
143 *
144 * @param element
145 * @return created <tt>TimePosition</tt>
146 * @throws XMLParsingException
147 * @throws InvalidGMLException
148 */
149 public static TimePosition parseTimePosition( Element element )
150 throws XMLParsingException, InvalidGMLException {
151 try {
152 String calendarEraName = XMLTools.getRequiredAttrValue( "calendarEraName", null, element );
153 URI frame = new URI( XMLTools.getRequiredAttrValue( "frame", null, element ) );
154 String indeterminatePosition = XMLTools.getRequiredAttrValue( "indeterminatePosition", null, element );
155 TimeIndeterminateValue tiv = new TimeIndeterminateValue( indeterminatePosition );
156 String tmp = XMLTools.getStringValue( element );
157 Calendar cal = null;
158
159 if ( !frame.toString().equals( "#ISO-8601" ) ) {
160 throw new InvalidGMLException( "just #ISO-8601 is supported as " + "frame for TimePosition." );
161 }
162
163 cal = TimeTools.createCalendar( tmp );
164
165 return new TimePosition( tiv, calendarEraName, frame, cal );
166 } catch ( URISyntaxException e ) {
167 throw new XMLParsingException( "couldn't parse timePosition frame\n" + StringTools.stackTraceToString( e ) );
168 }
169 }
170
171 /**
172 * creates a <tt>Grid</tt> instance from the passed <tt>Element</tt>
173 *
174 * @param element
175 * @return instance of <tt>Grid</tt>
176 * @throws InvalidGMLException
177 */
178 public static Grid parseGrid( Element element )
179 throws InvalidGMLException {
180 Grid grid = null;
181 try {
182 String path = "gml:limits/gml:GridEnvelope/gml:low";
183 String lo = XMLTools.getRequiredNodeAsString( element, path, nsContext );
184 double[] low = StringTools.toArrayDouble( lo, " ,;" );
185 path = "gml:limits/gml:GridEnvelope/gml:high";
186 String hi = XMLTools.getRequiredNodeAsString( element, path, nsContext );
187 double[] high = StringTools.toArrayDouble( hi, " ,;" );
188 Position posLo = GeometryFactory.createPosition( low );
189 Position posHi = GeometryFactory.createPosition( high );
190 Envelope env = GeometryFactory.createEnvelope( posLo, posHi, null );
191 String[] axis = XMLTools.getNodesAsStrings( element, "axisName/text()", nsContext );
192 grid = new Grid( env, axis );
193 } catch ( Exception e ) {
194 throw new InvalidGMLException( e.getMessage() );
195 }
196 return grid;
197 }
198
199 }