Source Code Cross Referenced for ShpServiceImpl.java in  » GIS » udig-1.1 » net » refractions » udig » catalog » internal » shp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » udig 1.1 » net.refractions.udig.catalog.internal.shp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    uDig - User Friendly Desktop Internet GIS client
003:         *    http://udig.refractions.net
004:         *    (C) 2004, Refractions Research Inc.
005:         *
006:         *    This library is free software; you can redistribute it and/or
007:         *    modify it under the terms of the GNU Lesser General Public
008:         *    License as published by the Free Software Foundation;
009:         *    version 2.1 of the License.
010:         *
011:         *    This library is distributed in the hope that it will be useful,
012:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         *    Lesser General Public License for more details.
015:         *
016:         */
017:        package net.refractions.udig.catalog.internal.shp;
018:
019:        import java.io.File;
020:        import java.io.IOException;
021:        import java.io.Serializable;
022:        import java.lang.reflect.InvocationTargetException;
023:        import java.net.URI;
024:        import java.net.URISyntaxException;
025:        import java.net.URL;
026:        import java.util.LinkedList;
027:        import java.util.List;
028:        import java.util.Map;
029:        import java.util.concurrent.locks.Lock;
030:
031:        import net.refractions.udig.catalog.CatalogPlugin;
032:        import net.refractions.udig.catalog.IResolve;
033:        import net.refractions.udig.catalog.IResolveChangeEvent;
034:        import net.refractions.udig.catalog.IResolveDelta;
035:        import net.refractions.udig.catalog.IService;
036:        import net.refractions.udig.catalog.IServiceInfo;
037:        import net.refractions.udig.catalog.URLUtils;
038:        import net.refractions.udig.catalog.internal.CatalogImpl;
039:        import net.refractions.udig.catalog.internal.ResolveChangeEvent;
040:        import net.refractions.udig.catalog.internal.ResolveDelta;
041:        import net.refractions.udig.catalog.shp.internal.Messages;
042:        import net.refractions.udig.ui.ErrorManager;
043:        import net.refractions.udig.ui.PlatformGIS;
044:        import net.refractions.udig.ui.UDIGDisplaySafeLock;
045:
046:        import org.eclipse.core.runtime.IProgressMonitor;
047:        import org.eclipse.core.runtime.NullProgressMonitor;
048:        import org.eclipse.core.runtime.SubProgressMonitor;
049:        import org.eclipse.jface.operation.IRunnableWithProgress;
050:        import org.eclipse.ui.PlatformUI;
051:        import org.geotools.data.DefaultQuery;
052:        import org.geotools.data.FeatureReader;
053:        import org.geotools.data.Transaction;
054:        import org.geotools.data.shapefile.ShapefileDataStore;
055:        import org.geotools.data.shapefile.indexed.IndexedShapefileDataStore;
056:        import org.geotools.data.shapefile.indexed.IndexedShapefileDataStoreFactory;
057:        import org.geotools.filter.Filter;
058:
059:        /**
060:         * Connect to a shapefile
061:         * 
062:         * @author David Zwiers, Refractions Research
063:         * @since 0.6
064:         */
065:        public class ShpServiceImpl extends IService {
066:
067:            private URL url = null;
068:
069:            private Map<String, Serializable> params = null;
070:
071:            /**
072:             * Construct <code>ShpServiceImpl</code>.
073:             * 
074:             * @param arg1
075:             * @param arg2
076:             */
077:            public ShpServiceImpl(URL arg1, Map<String, Serializable> arg2) {
078:                url = arg1;
079:                params = arg2;
080:                Serializable memorymapped = params.get("memory mapped buffer"); //$NON-NLS-1$
081:                if (memorymapped == null) {
082:                    memorymapped = false;
083:                    try {
084:                        File file = URLUtils.urlToFile(url);
085:                        final int maxsize = 1024 * 2048;
086:                        if (file.length() > maxsize) {
087:                            memorymapped = false;
088:                        }
089:                    } catch (Exception e) {
090:                        memorymapped = false;
091:                    }
092:                }
093:                if (!params
094:                        .containsKey(IndexedShapefileDataStoreFactory.CREATE_SPATIAL_INDEX.key))
095:                    params
096:                            .put(
097:                                    IndexedShapefileDataStoreFactory.CREATE_SPATIAL_INDEX.key,
098:                                    ShpPlugin.getDefault().isUseSpatialIndex());
099:            }
100:
101:            /*
102:             * Required adaptions: <ul> <li>IServiceInfo.class <li>List.class
103:             * <IGeoResource> </ul>
104:             * 
105:             * @see net.refractions.udig.catalog.IService#resolve(java.lang.Class,
106:             *      org.eclipse.core.runtime.IProgressMonitor)
107:             */
108:            public <T> T resolve(Class<T> adaptee, IProgressMonitor monitor)
109:                    throws IOException {
110:                if (monitor == null)
111:                    monitor = new NullProgressMonitor();
112:
113:                if (adaptee == null) {
114:                    throw new NullPointerException("No adaptor specified"); //$NON-NLS-1$
115:                }
116:                if (adaptee.isAssignableFrom(ShapefileDataStore.class))
117:                    return adaptee.cast(getDS(monitor));
118:                return super .resolve(adaptee, monitor);
119:            }
120:
121:            /*
122:             * @see net.refractions.udig.catalog.IResolve#canResolve(java.lang.Class)
123:             */
124:            public <T> boolean canResolve(Class<T> adaptee) {
125:                if (adaptee == null)
126:                    return false;
127:                return adaptee.isAssignableFrom(ShapefileDataStore.class)
128:                        || super .canResolve(adaptee);
129:            }
130:
131:            public void dispose(IProgressMonitor monitor) {
132:                if (members == null)
133:                    return;
134:
135:                int steps = (int) ((double) 99 / (double) members.size());
136:                for (IResolve resolve : members) {
137:                    try {
138:                        SubProgressMonitor subProgressMonitor = new SubProgressMonitor(
139:                                monitor, steps);
140:                        resolve.dispose(subProgressMonitor);
141:                        subProgressMonitor.done();
142:                    } catch (Throwable e) {
143:                        ErrorManager
144:                                .get()
145:                                .displayException(
146:                                        e,
147:                                        "Error disposing members of service: " + getIdentifier(), CatalogPlugin.ID); //$NON-NLS-1$
148:                    }
149:                }
150:            }
151:
152:            /*
153:             * @see net.refractions.udig.catalog.IResolve#members(org.eclipse.core.runtime.IProgressMonitor)
154:             */
155:            public List<ShpGeoResourceImpl> members(IProgressMonitor monitor)
156:                    throws IOException {
157:
158:                if (members == null) {
159:                    getDS(monitor); // slap it to load datastore
160:                    rLock.lock();
161:                    try {
162:                        if (members == null) {
163:                            members = new LinkedList<ShpGeoResourceImpl>();
164:                            String[] typenames = ds.getTypeNames();
165:                            if (typenames != null)
166:                                for (int i = 0; i < typenames.length; i++) {
167:                                    members.add(new ShpGeoResourceImpl(this ,
168:                                            typenames[i]));
169:                                }
170:                        }
171:                    } finally {
172:                        rLock.unlock();
173:                    }
174:                }
175:                return members;
176:            }
177:
178:            private volatile List<ShpGeoResourceImpl> members = null;
179:
180:            /*
181:             * @see net.refractions.udig.catalog.IService#getInfo(org.eclipse.core.runtime.IProgressMonitor)
182:             */
183:            public IServiceInfo getInfo(IProgressMonitor monitor)
184:                    throws IOException {
185:                getDS(monitor); // load ds
186:                if (info == null && ds != null) {
187:                    rLock.lock();
188:                    try {
189:                        if (info == null) {
190:                            info = new IServiceShpInfo();
191:                        }
192:                    } finally {
193:                        rLock.unlock();
194:                    }
195:                    IResolveDelta delta = new ResolveDelta(this ,
196:                            IResolveDelta.Kind.CHANGED);
197:                    ((CatalogImpl) CatalogPlugin.getDefault().getLocalCatalog())
198:                            .fire(new ResolveChangeEvent(this ,
199:                                    IResolveChangeEvent.Type.POST_CHANGE, delta));
200:                }
201:                return info;
202:            }
203:
204:            private volatile IServiceInfo info = null;
205:
206:            /*
207:             * @see net.refractions.udig.catalog.IService#getConnectionParams()
208:             */
209:            public Map<String, Serializable> getConnectionParams() {
210:                return params;
211:            }
212:
213:            private Throwable msg = null;
214:
215:            private volatile ShapefileDataStore ds = null;
216:
217:            protected final Lock rLock = new UDIGDisplaySafeLock();
218:
219:            private final static Lock dsInstantiationLock = new UDIGDisplaySafeLock();
220:
221:            ShapefileDataStore getDS(IProgressMonitor monitor)
222:                    throws IOException {
223:                if (ds == null) {
224:                    dsInstantiationLock.lock();
225:                    try {
226:                        if (ds == null) {
227:                            IndexedShapefileDataStoreFactory dsf = new IndexedShapefileDataStoreFactory();
228:                            if (dsf.canProcess(params)) {
229:
230:                                try {
231:                                    ds = (ShapefileDataStore) dsf
232:                                            .createDataStore(params);
233:                                    openIndexGenerationDialog(ds);
234:                                    // hit it lightly to make sure it exists.
235:                                    ds.getFeatureSource();
236:
237:                                } catch (IOException e) {
238:                                    msg = e;
239:                                    try {
240:                                        params
241:                                                .remove(IndexedShapefileDataStoreFactory.CREATE_SPATIAL_INDEX.key);
242:                                        ds = (ShapefileDataStore) dsf
243:                                                .createDataStore(params);
244:                                        // hit it lightly to make sure it exists.
245:                                        ds.getFeatureSource();
246:
247:                                    } catch (Exception e2) {
248:                                        msg = e2;
249:                                        throw (IOException) new IOException()
250:                                                .initCause(e2);
251:                                    }
252:                                }
253:                            }
254:                        }
255:                    } finally {
256:                        dsInstantiationLock.unlock();
257:                    }
258:                    IResolveDelta delta = new ResolveDelta(this ,
259:                            IResolveDelta.Kind.CHANGED);
260:                    ((CatalogImpl) CatalogPlugin.getDefault().getLocalCatalog())
261:                            .fire(new ResolveChangeEvent(this ,
262:                                    IResolveChangeEvent.Type.POST_CHANGE, delta));
263:                }
264:                return ds;
265:            }
266:
267:            private void openIndexGenerationDialog(final ShapefileDataStore ds) {
268:                rLock.lock();
269:                try {
270:                    if (ds instanceof  IndexedShapefileDataStore) {
271:                        IndexedShapefileDataStore ids = (IndexedShapefileDataStore) ds;
272:                        if (ids.isIndexed())
273:                            return;
274:                        String name = getIdentifier().getFile();
275:                        int lastIndexOf = name.lastIndexOf(File.separator);
276:                        if (lastIndexOf > 0)
277:                            name = name.substring(lastIndexOf + 1);
278:                        final String finalName = name;
279:                        IRunnableWithProgress runnable = new IRunnableWithProgress() {
280:
281:                            public void run(IProgressMonitor monitor)
282:                                    throws InvocationTargetException,
283:                                    InterruptedException {
284:                                monitor
285:                                        .beginTask(
286:                                                Messages.ShpPreferencePage_createindex
287:                                                        + " " + finalName, IProgressMonitor.UNKNOWN); //$NON-NLS-1$
288:                                index(ds, ds.getTypeNames()[0]);
289:                                monitor.done();
290:                            }
291:
292:                        };
293:                        if (PlatformUI.getWorkbench().isClosing() && false) {
294:                            try {
295:                                runnable.run(new NullProgressMonitor());
296:                            } catch (InvocationTargetException e) {
297:                                ShpPlugin.log("", e); //$NON-NLS-1$
298:                            } catch (InterruptedException e) {
299:                                ShpPlugin.log("", e); //$NON-NLS-1$
300:                            }
301:                        } else {
302:                            PlatformGIS
303:                                    .runInProgressDialog(
304:                                            Messages.ShpServiceImpl_indexing
305:                                                    + " " + finalName, true, runnable, false); //$NON-NLS-1$
306:                        }
307:                    }
308:                } finally {
309:                    rLock.unlock();
310:                }
311:
312:            }
313:
314:            private void index(final ShapefileDataStore ds,
315:                    final String typename) {
316:                FeatureReader reader = null;
317:                try {
318:                    // smack Datastore to generate indices
319:                    reader = ds.getFeatureReader(new DefaultQuery(typename,
320:                            Filter.NONE, new String[0]),
321:                            Transaction.AUTO_COMMIT);
322:                } catch (Exception e) {
323:                    ShpPlugin.log("", e); //$NON-NLS-1$
324:                } finally {
325:                    if (reader != null)
326:                        try {
327:                            reader.close();
328:                        } catch (IOException e) {
329:                            ShpPlugin.log("", e); //$NON-NLS-1$
330:                        }
331:                }
332:            }
333:
334:            /*
335:             * @see net.refractions.udig.catalog.IResolve#getStatus()
336:             */
337:            public Status getStatus() {
338:                return msg != null ? Status.BROKEN
339:                        : ds == null ? Status.NOTCONNECTED : Status.CONNECTED;
340:            }
341:
342:            /*
343:             * @see net.refractions.udig.catalog.IResolve#getMessage()
344:             */
345:            public Throwable getMessage() {
346:                return msg;
347:            }
348:
349:            /*
350:             * @see net.refractions.udig.catalog.IResolve#getIdentifier()
351:             */
352:            public URL getIdentifier() {
353:                return url;
354:            }
355:
356:            private class IServiceShpInfo extends IServiceInfo {
357:
358:                IServiceShpInfo() {
359:                    super ();
360:                    keywords = new String[] { ".shp", "Shapefile", //$NON-NLS-1$ //$NON-NLS-2$
361:                            ds.getTypeNames()[0] };
362:
363:                    try {
364:                        schema = new URI("shp://www.opengis.net/gml"); //$NON-NLS-1$
365:                    } catch (URISyntaxException e) {
366:                        ShpPlugin.log(null, e);
367:                        schema = null;
368:                    }
369:                }
370:
371:                public String getDescription() {
372:                    return getIdentifier().toString();
373:                }
374:
375:                public String getTitle() {
376:                    return getIdentifier().getFile();
377:                }
378:            }
379:        }
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