svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.mapcontext / org.gvsig.fmap.mapcontext.api / src / main / java / org / gvsig / fmap / mapcontext / layers / SpatialCache.java @ 47430
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.mapcontext.layers; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import org.cresques.cts.IProjection; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureQuery; |
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import org.gvsig.fmap.dal.feature.FeatureSet; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.GeometryLocator; |
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import org.gvsig.fmap.geom.SpatialIndex; |
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import org.gvsig.fmap.geom.primitive.Envelope; |
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import org.gvsig.fmap.mapcontext.layers.vectorial.SpatialEvaluatorsFactory; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dispose.DisposableIterator; |
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import org.gvsig.tools.dispose.DisposeUtils; |
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import org.gvsig.tools.evaluator.Evaluator; |
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import org.gvsig.tools.i18n.I18nManager; |
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import org.gvsig.tools.task.AbstractCancellableTask; |
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import org.gvsig.tools.task.CancellableTask; |
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import org.gvsig.tools.task.SimpleTaskStatus; |
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import org.gvsig.tools.visitor.Visitor; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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@SuppressWarnings("UseSpecificCatch") |
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public class SpatialCache { |
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private static final Logger logger = LoggerFactory.getLogger(SpatialCache.class); |
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private int maxFeatures = 1000; // Por defecto, pero se puede cambiar |
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private int fastNumTotalRegs = 0; |
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private SpatialIndex index = null; |
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private boolean overflown = false; |
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private Map<String, Boolean> enabledContexts; |
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private boolean enabled = false; |
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private AbstractCancellableTask refreshTask;
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public SpatialCache() {
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enabledContexts = new HashMap<>(); |
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refreshTask = null;
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try {
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this.index = GeometryLocator.getGeometryManager().createDefaultMemorySpatialIndex();
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} catch (Exception e) { |
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logger.info("Can't create spatial index", e);
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} |
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} |
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public int getMaxFeatures() { |
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return maxFeatures;
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} |
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public void setMaxFeatures(int maxFeatures) { |
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this.maxFeatures = maxFeatures;
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} |
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public synchronized void insert(Envelope bounds, Geometry geom) { |
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if (isEnabled()) {
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if (getMaxFeatures() >= size()) {
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this.index.insert(bounds, geom);
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fastNumTotalRegs++; |
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} else {
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overflown = true;
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} |
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} |
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} |
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public synchronized void query(Envelope searchEnv, Visitor visitor) { |
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if (!isEnabled()) {
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return;
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} |
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this.index.query(searchEnv, visitor);
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} |
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public synchronized List query(Envelope searchEnv) { |
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if (!isEnabled()) {
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return Collections.EMPTY_LIST; |
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} |
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List result = new ArrayList(); |
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Iterator it = index.query(searchEnv);
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while (it.hasNext()) {
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result.add(it.next()); |
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} |
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return result;
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} |
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public synchronized void insert(Envelope itemEnv, Object item) { |
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if (isEnabled()) {
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if (getMaxFeatures() >= size()) {
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this.index.insert(itemEnv, item);
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fastNumTotalRegs++; |
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} else {
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overflown = true;
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} |
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} |
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} |
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public synchronized boolean remove(Envelope itemEnv, Object item) { |
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boolean resul = this.index.remove(itemEnv, item); |
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if (resul) {
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fastNumTotalRegs--; |
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} |
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return resul;
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} |
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public int size() { |
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return fastNumTotalRegs;
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} |
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public synchronized void removeAll() { |
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if( this.refreshTask!=null ) { |
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this.refreshTask.cancelRequest();
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} |
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index.removeAll(); |
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fastNumTotalRegs = 0;
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overflown = false;
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} |
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public synchronized void remove(Envelope bounds, Geometry geom) { |
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index.remove(bounds, geom); |
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} |
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public boolean isEnabled() { |
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if (enabled) {
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return true; |
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} |
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for (Boolean value : this.enabledContexts.values()) { |
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if (value) {
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return true; |
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} |
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} |
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return false; |
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} |
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public boolean isEnabled(String contextId) { |
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return this.enabledContexts.getOrDefault(contextId, false); |
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} |
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public void setEnabled(boolean enabled) { |
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this.enabled = enabled;
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} |
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public void setEnabled(String contextId, boolean enabled) { |
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this.enabledContexts.put(contextId, enabled);
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} |
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public boolean isOverflown() { |
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return overflown;
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} |
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public boolean isContextEnabled() { |
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for (Boolean value : this.enabledContexts.values()) { |
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if (value) {
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return true; |
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} |
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} |
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return false; |
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} |
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public synchronized void refresh(String name, FeatureStore store, Envelope envelope, IProjection projection) { |
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if( store == null |
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|| envelope == null || envelope.isEmpty() || envelope.isCollapsed()
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|| projection == null ) {
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return;
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} |
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removeAll(); |
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this.refreshTask = new AbstractCancellableTask("SpatialCacheRefresh_"+name) { |
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@Override
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public void run() { |
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I18nManager i18n = ToolsLocator.getI18nManager(); |
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DisposeUtils.bind(store); |
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FeatureSet fset = null;
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DisposableIterator<Feature> it = null;
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SimpleTaskStatus status = ToolsLocator.getTaskStatusManager().createDefaultSimpleTaskStatus("SpatialCache "+name);
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try {
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status.setAutoremove(true);
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status.add(); |
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Evaluator evaluator = SpatialEvaluatorsFactory.getInstance().contains(envelope, projection, store); |
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FeatureQuery query = store.createFeatureQuery(); |
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query.addFilter(evaluator); |
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query.setLimit(getMaxFeatures()); |
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status.message(i18n.getTranslation("_Searching_geometries"));
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fset = store.getFeatureSet(query); |
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status.setRangeOfValues(0, fset.size64());
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it = fset.fastIterator(); |
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while( it.hasNext() ) {
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if( this.isCancellationRequested() || status.isCancellationRequested() ) { |
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status.cancel(); |
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return;
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} |
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Geometry geom = it.next().getDefaultGeometry(); |
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insert(geom.getEnvelope(), geom); |
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status.incrementCurrentValue(); |
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} |
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status.terminate(); |
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} catch (Exception ex) { |
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logger.warn("Can't refresh spatial cache of '"+name+"'", ex); |
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status.abort(); |
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} finally {
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if( this == refreshTask ) { |
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refreshTask = null;
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} |
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if( status.isRunning() ) {
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status.terminate(); |
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} |
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DisposeUtils.disposeQuietly(it); |
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DisposeUtils.disposeQuietly(fset); |
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DisposeUtils.disposeQuietly(store); |
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} |
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} |
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}; |
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this.refreshTask.setPriority((Thread.MAX_PRIORITY+Thread.MIN_PRIORITY)/4); |
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this.refreshTask.start();
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} |
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} |