001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/graphics/displayelements/ScaledFeature.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.graphics.displayelements;
037
038 import java.util.HashMap;
039 import java.util.Map;
040
041 import org.deegree.datatypes.QualifiedName;
042 import org.deegree.datatypes.Types;
043 import org.deegree.io.datastore.PropertyPathResolvingException;
044 import org.deegree.model.feature.Feature;
045 import org.deegree.model.feature.FeatureFactory;
046 import org.deegree.model.feature.FeatureProperty;
047 import org.deegree.model.feature.schema.FeatureType;
048 import org.deegree.model.feature.schema.PropertyType;
049 import org.deegree.model.spatialschema.Envelope;
050 import org.deegree.model.spatialschema.Geometry;
051 import org.deegree.model.spatialschema.GeometryException;
052 import org.deegree.ogcbase.PropertyPath;
053
054 /**
055 * This class is a wrapper for a Feature and a Feature itself.
056 * <p>
057 * It adds a special behavior/property to a feature that is required by deegree DisplayElements. This special behavior
058 * is an additional property named "$SCALE". In opposite to conventional properties this one can change its value during
059 * lifetime of a feature without changing the underlying feature itself. <br>
060 * The class is use to offer users the opportunity to use the scale of a map within expressions embedded in SLD
061 * rules/symbolizers, i.e. this enables a user to define that a symbol shall appear in 10m size independ of a map's
062 * scale.
063 *
064 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
065 * @author last edited by: $Author: mschneider $
066 *
067 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
068 */
069 public class ScaledFeature implements Feature {
070
071 private Feature feature;
072
073 private FeatureType ft;
074
075 private FeatureProperty[] props;
076
077 private Map<String, String> attributeMap = new HashMap<String, String>();
078
079 /**
080 *
081 * @param feature
082 * feature wrap
083 * @param scale
084 * maps scale (should be -1 if not known)
085 */
086 public ScaledFeature( Feature feature, double scale ) {
087 this.feature = feature;
088 PropertyType[] ftp = feature.getFeatureType().getProperties();
089 PropertyType[] ftp2 = new PropertyType[ftp.length + 1];
090 for ( int i = 0; i < ftp.length; i++ ) {
091 ftp2[i] = ftp[i];
092 }
093 QualifiedName qn = new QualifiedName( feature.getName().getPrefix(), "$SCALE", feature.getName().getNamespace() );
094 ftp2[ftp2.length - 1] = FeatureFactory.createSimplePropertyType( qn, Types.DOUBLE, false );
095 FeatureProperty[] o = feature.getProperties();
096 props = new FeatureProperty[o.length + 1];
097 for ( int i = 0; i < o.length; i++ ) {
098 props[i] = o[i];
099 }
100 props[props.length - 1] = FeatureFactory.createFeatureProperty( qn, new Double( scale ) );
101 ft = FeatureFactory.createFeatureType( feature.getFeatureType().getName(), false, ftp2 );
102 }
103
104 /**
105 * @return features owner
106 */
107 public FeatureProperty getOwner() {
108 return feature.getOwner();
109 }
110
111 /**
112 * @return feature description
113 */
114 public String getDescription() {
115 return feature.getDescription();
116 }
117
118 /**
119 * @return features name
120 */
121 public QualifiedName getName() {
122 return feature.getName();
123 }
124
125 /**
126 * @see Feature#getDefaultGeometryPropertyValue()
127 */
128 public Geometry getDefaultGeometryPropertyValue() {
129 return feature.getDefaultGeometryPropertyValue();
130 }
131
132 /**
133 * @return features envelope
134 */
135 public Envelope getBoundedBy()
136 throws GeometryException {
137 return feature.getBoundedBy();
138 }
139
140 /**
141 * @see Feature#getFeatureType() the returned feature type contains all properties of the wrapped feature plus a
142 * property named '$SCALE'
143 */
144 public FeatureType getFeatureType() {
145 return ft;
146 }
147
148 /**
149 * @see Feature#getGeometryPropertyValues()
150 */
151 public Geometry[] getGeometryPropertyValues() {
152 return feature.getGeometryPropertyValues();
153 }
154
155 /**
156 * @see Feature#getId()
157 */
158 public String getId() {
159 return feature.getId();
160 }
161
162 /**
163 * @see Feature#getProperties() the returned array contains all properties of the wrapped feature plus a property
164 * named '$SCALE'
165 */
166 public FeatureProperty[] getProperties() {
167 return props;
168 }
169
170 /**
171 * The property '$SCALE' has the highest valid index
172 */
173 public FeatureProperty[] getProperties( int index ) {
174 return new FeatureProperty[] { props[index] };
175 }
176
177 /**
178 * use '$SCALE' to access the scale property value
179 */
180 public FeatureProperty getDefaultProperty( QualifiedName name ) {
181 QualifiedName qn = new QualifiedName( "$SCALE" );
182 if ( name.equals( qn ) ) {
183 return props[props.length - 1];
184 }
185 return feature.getDefaultProperty( name );
186 }
187
188 /**
189 * @param name
190 * @return property array
191 */
192 public FeatureProperty[] getProperties( QualifiedName name ) {
193 if ( name.getLocalName().equalsIgnoreCase( "$SCALE" ) ) {
194 return new FeatureProperty[] { props[props.length - 1] };
195 }
196 return feature.getProperties( name );
197 }
198
199 /**
200 * @param path
201 * @return property
202 */
203 public FeatureProperty getDefaultProperty( PropertyPath path )
204 throws PropertyPathResolvingException {
205 if ( path.getStep( 0 ).getPropertyName().getLocalName().equalsIgnoreCase( "$SCALE" ) ) {
206 return props[props.length - 1];
207 }
208 return feature.getDefaultProperty( path );
209 }
210
211 public void setProperty( FeatureProperty property, int index ) {
212 feature.setProperty( property, index );
213 }
214
215 /**
216 * sets the features scale. Expected is the scale denominator as defined by OGC SLD specification
217 *
218 * @param scale
219 */
220 public void setScale( double scale ) {
221 // must be multiplied with pixel size to get scale as length
222 // of a pixels diagonal measured in meter
223 props[props.length - 1].setValue( scale * 0.00028 );
224 }
225
226 /**
227 * returns the features scale
228 *
229 * @return the features scale
230 */
231 public double getScale() {
232 return ( (Double) props[props.length - 1].getValue() ).doubleValue();
233 }
234
235 /**
236 * @param property
237 */
238 public void addProperty( FeatureProperty property ) {
239 this.feature.addProperty( property );
240 }
241
242 /**
243 * @param propertyName
244 */
245 public void removeProperty( QualifiedName propertyName ) {
246 this.feature.removeProperty( propertyName );
247 }
248
249 /**
250 * @param oldProperty
251 * @param newProperty
252 */
253 public void replaceProperty( FeatureProperty oldProperty, FeatureProperty newProperty ) {
254 this.feature.replaceProperty( oldProperty, newProperty );
255 }
256
257 /**
258 * @param fid
259 */
260 public void setId( String fid ) {
261 feature.setId( fid );
262 }
263
264 /**
265 * Returns the attribute value of the attribute with the specified name.
266 *
267 * @param name
268 * name of the attribute
269 * @return the attribute value
270 */
271 public String getAttribute( String name ) {
272 return this.attributeMap.get( name );
273 }
274
275 /**
276 * Returns all attributes of the feature.
277 *
278 * @return all attributes, keys are names, values are attribute values
279 */
280 public Map<String, String> getAttributes() {
281 return this.attributeMap;
282 }
283
284 /**
285 * Sets the value of the attribute with the given name.
286 *
287 * @param name
288 * name of the attribute
289 * @param value
290 * value to set
291 */
292 public void setAttribute( String name, String value ) {
293 this.attributeMap.put( name, value );
294 }
295
296 /**
297 * Sets the feature type of this feature.
298 *
299 * @param ft
300 * feature type to set
301 */
302 public void setFeatureType( FeatureType ft ) {
303 feature.setFeatureType( ft );
304 }
305
306 /*
307 * (non-Javadoc)
308 *
309 * @see org.deegree.model.feature.Feature#setEnvelopesUpdated()
310 */
311 public void setEnvelopesUpdated() {
312 feature.setEnvelopesUpdated();
313 }
314
315 /*
316 * (non-Javadoc)
317 *
318 * @see org.deegree.model.feature.Feature#cloneDeep()
319 */
320 public Feature cloneDeep()
321 throws CloneNotSupportedException {
322 throw new CloneNotSupportedException();
323 }
324
325 @Override
326 public Object clone()
327 throws CloneNotSupportedException {
328 throw new CloneNotSupportedException();
329 }
330
331 }