Source Code Cross Referenced for CoverageStoreUtils.java in  » GIS » GeoServer » org » vfny » geoserver » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoServer » org.vfny.geoserver.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* Copyright (c) 2001 - 2007 TOPP - www.openplans.org.  All rights reserved.
002:         * This code is licensed under the GPL 2.0 license, availible at the root
003:         * application directory.
004:         */
005:        package org.vfny.geoserver.util;
006:
007:        import org.geotools.coverage.grid.io.GridFormatFactorySpi;
008:        import org.geotools.coverage.grid.io.GridFormatFinder;
009:        import org.geotools.geometry.GeneralEnvelope;
010:        import org.geotools.referencing.CRS;
011:        import org.geotools.referencing.crs.DefaultGeographicCRS;
012:        import org.geotools.resources.CRSUtilities;
013:        import org.opengis.coverage.grid.Format;
014:        import org.opengis.parameter.ParameterDescriptor;
015:        import org.opengis.parameter.ParameterValue;
016:        import org.opengis.parameter.ParameterValueGroup;
017:        import org.opengis.referencing.FactoryException;
018:        import org.opengis.referencing.crs.CoordinateReferenceSystem;
019:        import org.opengis.referencing.operation.MathTransform;
020:        import org.opengis.referencing.operation.TransformException;
021:        import java.io.IOException;
022:        import java.util.ArrayList;
023:        import java.util.Collections;
024:        import java.util.HashMap;
025:        import java.util.Iterator;
026:        import java.util.List;
027:        import java.util.Map;
028:        import java.util.logging.Logger;
029:        import javax.servlet.ServletContext;
030:
031:        /**
032:         * A collection of utilties for dealing with GeotTools Format.
033:         *
034:         * @author Richard Gould, Refractions Research, Inc.
035:         * @author cholmesny
036:         * @author $Author: Alessio Fabiani (alessio.fabiani@gmail.com) $ (last
037:         *         modification)
038:         * @author $Author: Simone Giannecchini (simboss1@gmail.com) $ (last
039:         *         modification)
040:         * @version $Id: CoverageStoreUtils.java,v 1.12 2004/09/21 21:14:48 cholmesny
041:         *          Exp $
042:         */
043:        public final class CoverageStoreUtils {
044:            private final static Logger LOGGER = org.geotools.util.logging.Logging
045:                    .getLogger(CoverageStoreUtils.class.toString());
046:            public final static Format[] formats = GridFormatFinder
047:                    .getFormatArray();
048:
049:            private CoverageStoreUtils() {
050:            }
051:
052:            public static Format acquireFormat(String type, ServletContext sc)
053:                    throws IOException {
054:                Format[] formats = GridFormatFinder.getFormatArray();
055:                Format format = null;
056:                final int length = formats.length;
057:
058:                for (int i = 0; i < length; i++) {
059:                    if (formats[i].getName().equals(type)) {
060:                        format = formats[i];
061:
062:                        break;
063:                    }
064:                }
065:
066:                if (format == null) {
067:                    throw new IOException("Cannot handle format: " + type);
068:                } else {
069:                    return format;
070:                }
071:            }
072:
073:            //	public static Map getParams(Map m, ServletContext sc) {
074:            //		String baseDir = sc.getRealPath("/");
075:            //		return Collections.synchronizedMap(getParams(m, baseDir));
076:            //	}
077:            //
078:            //	/**
079:            //	 * Get Connect params.
080:            //	 */
081:            //	public static Map getParams(Map m, String baseDir) {
082:            //		return Collections.synchronizedMap(CoverageStoreInfo.getParams(m, baseDir));
083:            //	}
084:
085:            /**
086:             * Utility method for finding Params
087:             *
088:             * @param factory
089:             *            DOCUMENT ME!
090:             * @param key
091:             *            DOCUMENT ME!
092:             *
093:             * @return DOCUMENT ME!
094:             */
095:            public static ParameterValue find(Format format, String key) {
096:                return find(format.getReadParameters(), key);
097:            }
098:
099:            /**
100:             * Utility methods for find param by key
101:             *
102:             * @param params
103:             *            DOCUMENT ME!
104:             * @param key
105:             *            DOCUMENT ME!
106:             *
107:             * @return DOCUMENT ME!
108:             */
109:            public static ParameterValue find(ParameterValueGroup params,
110:                    String key) {
111:                List list = params.values();
112:                Iterator it = list.iterator();
113:                ParameterDescriptor descr;
114:                ParameterValue val;
115:
116:                while (it.hasNext()) {
117:                    val = (ParameterValue) it.next();
118:                    descr = (ParameterDescriptor) val.getDescriptor();
119:
120:                    if (key.equalsIgnoreCase(descr.getName().toString())) {
121:                        return val;
122:                    }
123:                }
124:
125:                return null;
126:            }
127:
128:            /**
129:             * When loading from DTO use the params to locate factory.
130:             *
131:             * <p>
132:             * bleck
133:             * </p>
134:             *
135:             * @return
136:             */
137:            public static Format aquireFactoryByType(String type) {
138:                final Format[] formats = GridFormatFinder.getFormatArray();
139:                Format format = null;
140:                final int length = formats.length;
141:
142:                for (int i = 0; i < length; i++) {
143:                    format = formats[i];
144:
145:                    if (format.getName().equals(type)) {
146:                        return format;
147:                    }
148:                }
149:
150:                return null;
151:            }
152:
153:            /**
154:             * After user has selected Description can aquire Format based on
155:             * description.
156:             *
157:             * @param description
158:             *
159:             * @return
160:             */
161:            public static Format aquireFactory(String description) {
162:                Format[] formats = GridFormatFinder.getFormatArray();
163:                Format format = null;
164:                final int length = formats.length;
165:
166:                for (int i = 0; i < length; i++) {
167:                    format = formats[i];
168:
169:                    if (format.getDescription().equals(description)) {
170:                        return format;
171:                    }
172:                }
173:
174:                return null;
175:            }
176:
177:            /**
178:             * Returns the descriptions for the available DataFormats.
179:             *
180:             * <p>
181:             * Arrrg! Put these in the select box.
182:             * </p>
183:             *
184:             * @return Descriptions for user to choose from
185:             */
186:            public static List listDataFormatsDescriptions() {
187:                List list = new ArrayList();
188:                Format[] formats = GridFormatFinder.getFormatArray();
189:                final int length = formats.length;
190:
191:                for (int i = 0; i < length; i++) {
192:                    if (!list.contains(formats[i].getDescription())) {
193:                        list.add(formats[i].getDescription());
194:                    }
195:                }
196:
197:                return Collections.synchronizedList(list);
198:            }
199:
200:            public static List listDataFormats() {
201:                List list = new ArrayList();
202:                Format[] formats = GridFormatFinder.getFormatArray();
203:                final int length = formats.length;
204:
205:                for (int i = 0; i < length; i++) {
206:                    if (!list.contains(formats[i])) {
207:                        list.add(formats[i]);
208:                    }
209:                }
210:
211:                return Collections.synchronizedList(list);
212:            }
213:
214:            public static Map defaultParams(String description) {
215:                return Collections
216:                        .synchronizedMap(defaultParams(aquireFactory(description)));
217:            }
218:
219:            public static Map defaultParams(Format factory) {
220:                Map defaults = new HashMap();
221:                ParameterValueGroup params = factory.getReadParameters();
222:
223:                if (params != null) {
224:                    List list = params.values();
225:                    Iterator it = list.iterator();
226:                    ParameterDescriptor descr = null;
227:                    ParameterValue val = null;
228:                    String key;
229:                    Object value;
230:
231:                    while (it.hasNext()) {
232:                        val = (ParameterValue) it.next();
233:                        descr = (ParameterDescriptor) val.getDescriptor();
234:
235:                        key = descr.getName().toString();
236:                        value = null;
237:
238:                        if (val.getValue() != null) {
239:                            // Required params may have nice sample values
240:                            //
241:                            if ("values_palette".equalsIgnoreCase(key)) {
242:                                value = val.getValue();
243:                            } else {
244:                                value = val.getValue().toString();
245:                            }
246:                        }
247:
248:                        if (value == null) {
249:                            // or not
250:                            value = "";
251:                        }
252:
253:                        if (value != null) {
254:                            defaults.put(key, value);
255:                        }
256:                    }
257:                }
258:
259:                return Collections.synchronizedMap(defaults);
260:            }
261:
262:            /**
263:             * Convert map to real values based on factory Params.
264:             *
265:             * @param factory
266:             * @param params
267:             *
268:             * @return Map with real values that may be acceptable to GDSFactory
269:             *
270:             * @throws IOException
271:             *             DOCUMENT ME!
272:             */
273:            public static Map toParams(GridFormatFactorySpi factory, Map params)
274:                    throws IOException {
275:                final Map map = new HashMap(params.size());
276:
277:                final ParameterValueGroup info = factory.createFormat()
278:                        .getReadParameters();
279:                String key;
280:                Object value;
281:
282:                // Convert Params into the kind of Map we actually need
283:                for (Iterator i = params.keySet().iterator(); i.hasNext();) {
284:                    key = (String) i.next();
285:                    value = find(info, key).getValue();
286:
287:                    if (value != null) {
288:                        map.put(key, value);
289:                    }
290:                }
291:
292:                return Collections.synchronizedMap(map);
293:            }
294:
295:            /**
296:             * Retrieve a WGS84 lon,lat envelope from the provided one.
297:             *
298:             * @param sourceCRS
299:             * @param targetEnvelope
300:             * @return
301:             * @throws IndexOutOfBoundsException
302:             * @throws FactoryException
303:             * @throws TransformException
304:             */
305:            public static GeneralEnvelope getWGS84LonLatEnvelope(
306:                    GeneralEnvelope envelope) throws IndexOutOfBoundsException,
307:                    FactoryException, TransformException {
308:                final CoordinateReferenceSystem sourceCRS = envelope
309:                        .getCoordinateReferenceSystem();
310:
311:                ////
312:                //
313:                // Do we need to transform?
314:                //
315:                ////
316:                if (CRSUtilities.equalsIgnoreMetadata(sourceCRS,
317:                        DefaultGeographicCRS.WGS84)) {
318:                    return new GeneralEnvelope(envelope);
319:                }
320:
321:                ////
322:                //
323:                //transform
324:                //
325:                ////
326:                final CoordinateReferenceSystem targetCRS = DefaultGeographicCRS.WGS84;
327:                final MathTransform mathTransform = CRS.findMathTransform(
328:                        sourceCRS, targetCRS, true);
329:                final GeneralEnvelope targetEnvelope;
330:
331:                if (!mathTransform.isIdentity()) {
332:                    targetEnvelope = CRS.transform(mathTransform, envelope);
333:                } else {
334:                    targetEnvelope = new GeneralEnvelope(envelope);
335:                }
336:
337:                targetEnvelope.setCoordinateReferenceSystem(targetCRS);
338:
339:                return targetEnvelope;
340:            }
341:
342:            //	/**
343:            //	 * Get a generic envelope and retrieve a lon,lat envelope.
344:            //	 * 
345:            //	 * @param sourceCRS
346:            //	 * @param envelope
347:            //	 * @return
348:            //	 * @throws IndexOutOfBoundsException
349:            //	 * @throws MismatchedDimensionException
350:            //	 * @throws NoSuchAuthorityCodeException
351:            //	 */
352:            //	public static GeneralEnvelope adjustEnvelopeLongitudeFirst(
353:            //			final CoordinateReferenceSystem sourceCRS, GeneralEnvelope envelope)
354:            //			throws IndexOutOfBoundsException, MismatchedDimensionException,
355:            //			NoSuchAuthorityCodeException {
356:            //
357:            //		// /////////////////////////////////////////////////////////////////////
358:            //		//
359:            //		// Is Lon first?
360:            //		//
361:            //		// /////////////////////////////////////////////////////////////////////
362:            //		final CoordinateReferenceSystem crs2D;
363:            //		try {
364:            //			crs2D = CRSUtilities.getCRS2D(sourceCRS);
365:            //		} catch (TransformException e) {
366:            //			LOGGER.log(Level.SEVERE, e.getLocalizedMessage(), e);
367:            //			return null;
368:            //		}
369:            //		final CoordinateSystem sourceCS = crs2D.getCoordinateSystem();
370:            //		final boolean lonFirst = !GridGeometry2D.swapXY(sourceCS);
371:            //
372:            //		// /////////////////////////////////////////////////////////////////////
373:            //		//
374:            //		// Creating a new envelope lon,lat
375:            //		//
376:            //		// /////////////////////////////////////////////////////////////////////
377:            //		final GeneralEnvelope lonLatEnvelope = lonFirst ? new GeneralEnvelope(
378:            //				envelope) : new GeneralEnvelope(new double[] {
379:            //				envelope.getLowerCorner().getOrdinate(1),
380:            //				envelope.getLowerCorner().getOrdinate(0) }, new double[] {
381:            //				envelope.getUpperCorner().getOrdinate(1),
382:            //				envelope.getUpperCorner().getOrdinate(0) });
383:            //		lonLatEnvelope.setCoordinateReferenceSystem(crs2D);
384:            //		return lonLatEnvelope;
385:            //	}
386:        }
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