Source Code Cross Referenced for TransformedCoverage.java in  » GIS » GeoTools-2.4.1 » org » geotools » coverage » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.coverage 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2005-2006, Geotools Project Managment Committee (PMC)
005:         *    (C) 2005, Institut de Recherche pour le Développement
006:         *
007:         *    This library is free software; you can redistribute it and/or
008:         *    modify it under the terms of the GNU Lesser General Public
009:         *    License as published by the Free Software Foundation; either
010:         *    version 2.1 of the License, or (at your option) any later version.
011:         *
012:         *    This library is distributed in the hope that it will be useful,
013:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         *    Lesser General Public License for more details.
016:         */
017:        package org.geotools.coverage;
018:
019:        // J2SE and JAI dependencies
020:        import javax.media.jai.PropertySource;
021:
022:        // OpenGIS dependencies
023:        import org.opengis.coverage.Coverage;
024:        import org.opengis.coverage.SampleDimension;
025:        import org.opengis.coverage.CannotEvaluateException;
026:        import org.opengis.geometry.Envelope;
027:        import org.opengis.geometry.DirectPosition;
028:        import org.opengis.referencing.FactoryException;
029:        import org.opengis.referencing.crs.CoordinateReferenceSystem;
030:        import org.opengis.referencing.operation.MathTransform;
031:        import org.opengis.referencing.operation.TransformException;
032:
033:        // Geotools dependencies
034:        import org.geotools.factory.Hints;
035:        import org.geotools.referencing.CRS;
036:        import org.geotools.referencing.ReferencingFactoryFinder;
037:        import org.geotools.geometry.GeneralDirectPosition;
038:        import org.geotools.geometry.GeneralEnvelope;
039:
040:        /**
041:         * A coverage wrapping an other one with a different coordinate reference system. The coordinate
042:         * transformation is applied on the fly every time an {@code evaluate} method is invoked. It may
043:         * be efficient if few points are queried, but become ineficient if a large amount of points is
044:         * queried. In the later case, consider reprojecting the whole grid coverage instead.
045:         * <br><br>
046:         * <strong>Note:</strong> This class is not thread safe for performance reasons. If desired,
047:         * users should create one instance of {@code TransformedCoverage} for each thread.
048:         *
049:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/coverage/src/main/java/org/geotools/coverage/TransformedCoverage.java $
050:         * @version $Id: TransformedCoverage.java 25050 2007-04-06 00:41:49Z jgarnett $
051:         * @author Martin Desruisseaux
052:         *
053:         * @since 2.1
054:         */
055:        public class TransformedCoverage extends AbstractCoverage {
056:            /**
057:             * The hints for the creation of coordinate operation.
058:             * The default coordinate operation factory should be suffisient.
059:             */
060:            private static final Hints HINTS = null;
061:
062:            /**
063:             * The wrapped coverage.
064:             */
065:            protected final Coverage coverage;
066:
067:            /**
068:             * The transform from this coverage CRS to the wrapped coverage CRS.
069:             */
070:            private final MathTransform toWrapped;
071:
072:            /**
073:             * The projected point.
074:             */
075:            private final GeneralDirectPosition position;
076:
077:            /**
078:             * Creates a new coverage wrapping the specified one.
079:             *
080:             * @param  name     The name for this new coverage.
081:             * @param  crs      The crs for this coverage.
082:             * @param  coverage The coverage to wraps.
083:             * @throws FactoryException if no transformation can be found from the coverage CRS to the
084:             *         specified CRS.
085:             */
086:            protected TransformedCoverage(final CharSequence name,
087:                    final CoordinateReferenceSystem crs, final Coverage coverage)
088:                    throws FactoryException {
089:                super (
090:                        name,
091:                        crs,
092:                        (coverage instanceof  PropertySource) ? ((PropertySource) coverage)
093:                                : null, null);
094:                this .coverage = coverage;
095:                position = new GeneralDirectPosition(crs.getCoordinateSystem()
096:                        .getDimension());
097:                toWrapped = ReferencingFactoryFinder
098:                        .getCoordinateOperationFactory(HINTS).createOperation(
099:                                crs, coverage.getCoordinateReferenceSystem())
100:                        .getMathTransform();
101:            }
102:
103:            /**
104:             * Creates a new coverage wrapping the specified one with a different CRS.
105:             * If the specified coverage already uses the specified CRS (or an equivalent one),
106:             * it is returned unchanged.
107:             *
108:             * @param  name     The name for this new coverage.
109:             * @param  crs      The crs for this coverage.
110:             * @param  coverage The coverage to wraps.
111:             * @return A coverage using the specified CRS.
112:             * @throws FactoryException if no transformation can be found from the coverage CRS to the
113:             *         specified CRS.
114:             */
115:            public static Coverage reproject(final CharSequence name,
116:                    final CoordinateReferenceSystem crs, Coverage coverage)
117:                    throws FactoryException {
118:                while (true) {
119:                    if (CRS.equalsIgnoreMetadata(coverage
120:                            .getCoordinateReferenceSystem(), crs)) {
121:                        return coverage;
122:                    }
123:                    if (TransformedCoverage.class.equals(coverage.getClass())) {
124:                        coverage = ((TransformedCoverage) coverage).coverage;
125:                        continue;
126:                    }
127:                    break;
128:                }
129:                return new TransformedCoverage(name, crs, coverage);
130:            }
131:
132:            /**
133:             * The number of sample dimensions in the coverage.
134:             * For grid coverages, a sample dimension is a band.
135:             *
136:             * @return The number of sample dimensions in the coverage.
137:             */
138:            public int getNumSampleDimensions() {
139:                return coverage.getNumSampleDimensions();
140:            }
141:
142:            /**
143:             * Retrieve sample dimension information for the coverage.
144:             *
145:             * @param  index Index for sample dimension to retrieve. Indices are numbered 0 to
146:             *         (<var>{@linkplain #getNumSampleDimensions n}</var>-1).
147:             * @return Sample dimension information for the coverage.
148:             * @throws IndexOutOfBoundsException if {@code index} is out of bounds.
149:             */
150:            public SampleDimension getSampleDimension(final int index)
151:                    throws IndexOutOfBoundsException {
152:                return coverage.getSampleDimension(index);
153:            }
154:
155:            /**
156:             * Wraps the checked exception into an unchecked one.
157:             *
158:             * @todo Provides a localized message.
159:             */
160:            private final CannotEvaluateException transformationFailed(
161:                    final TransformException cause) {
162:                return new CannotEvaluateException("Transformation failed",
163:                        cause);
164:            }
165:
166:            /**
167:             * Returns the envelope.
168:             */
169:            public Envelope getEnvelope() {
170:                final GeneralEnvelope envelope;
171:                try {
172:                    envelope = CRS.transform(toWrapped.inverse(), coverage
173:                            .getEnvelope());
174:                } catch (TransformException exception) {
175:                    throw transformationFailed(exception);
176:                }
177:                envelope.setCoordinateReferenceSystem(crs);
178:                return envelope;
179:            }
180:
181:            /**
182:             * Returns the value vector for a given point in the coverage.
183:             *
184:             * @param  coord The coordinate point where to evaluate.
185:             * @throws PointOutsideCoverageException if {@code coord} is outside coverage.
186:             * @throws CannotEvaluateException if the computation failed for some other reason.
187:             */
188:            public final Object evaluate(final DirectPosition coord)
189:                    throws CannotEvaluateException {
190:                try {
191:                    return coverage.evaluate(toWrapped.transform(coord,
192:                            position));
193:                } catch (TransformException exception) {
194:                    throw transformationFailed(exception);
195:                }
196:            }
197:
198:            /**
199:             * Returns a sequence of boolean values for a given point in the coverage.
200:             */
201:            public final boolean[] evaluate(final DirectPosition coord,
202:                    boolean[] dest) throws CannotEvaluateException {
203:                try {
204:                    return coverage.evaluate(toWrapped.transform(coord,
205:                            position), dest);
206:                } catch (TransformException exception) {
207:                    throw transformationFailed(exception);
208:                }
209:            }
210:
211:            /**
212:             * Returns a sequence of byte values for a given point in the coverage.
213:             */
214:            public final byte[] evaluate(final DirectPosition coord, byte[] dest)
215:                    throws CannotEvaluateException {
216:                try {
217:                    return coverage.evaluate(toWrapped.transform(coord,
218:                            position), dest);
219:                } catch (TransformException exception) {
220:                    throw transformationFailed(exception);
221:                }
222:            }
223:
224:            /**
225:             * Returns a sequence of integer values for a given point in the coverage.
226:             */
227:            public final int[] evaluate(final DirectPosition coord, int[] dest)
228:                    throws CannotEvaluateException {
229:                try {
230:                    return coverage.evaluate(toWrapped.transform(coord,
231:                            position), dest);
232:                } catch (TransformException exception) {
233:                    throw transformationFailed(exception);
234:                }
235:            }
236:
237:            /**
238:             * Returns a sequence of float values for a given point in the coverage.
239:             */
240:            public final float[] evaluate(final DirectPosition coord,
241:                    float[] dest) throws CannotEvaluateException {
242:                try {
243:                    return coverage.evaluate(toWrapped.transform(coord,
244:                            position), dest);
245:                } catch (TransformException exception) {
246:                    throw transformationFailed(exception);
247:                }
248:            }
249:
250:            /**
251:             * Returns a sequence of double values for a given point in the coverage.
252:             */
253:            public final double[] evaluate(final DirectPosition coord,
254:                    final double[] dest) throws CannotEvaluateException {
255:                try {
256:                    return coverage.evaluate(toWrapped.transform(coord,
257:                            position), dest);
258:                } catch (TransformException exception) {
259:                    throw transformationFailed(exception);
260:                }
261:            }
262:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.