package org.geotools.tutorial.quickstart;
import java.io.File;
import org.geotools.data.CachingFeatureSource;
import org.geotools.data.FileDataStore;
import org.geotools.data.FileDataStoreFinder;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.map.FeatureLayer;
import org.geotools.map.Layer;
import org.geotools.map.MapContent;
import org.geotools.styling.SLD;
import org.geotools.styling.Style;
import org.geotools.swing.JMapFrame;
import org.geotools.swing.data.JFileDataStoreChooser;
/**
* Example used in Quickstart workbook showing how to use a CachingFeatureSource.
* <p>
* This is the GeoTools Quickstart application used in documentationa and tutorials. *
*/
public class QuickstartCache {
// docs start cache
/**
* This method demonstrates using a memory-based cache to speed up the display (e.g. when
* zooming in and out).
*
* There is just one line extra compared to the main method, where we create an instance of
* CachingFeatureStore.
*/
public static void main(String[] args) throws Exception {
// display a data store file chooser dialog for shapefiles
File file = JFileDataStoreChooser.showOpenFile("shp", null);
if (file == null) {
return;
}
FileDataStore store = FileDataStoreFinder.getDataStore(file);
SimpleFeatureSource featureSource = store.getFeatureSource();
// CachingFeatureSource is deprecated as experimental (not yet production ready)
CachingFeatureSource cache = new CachingFeatureSource(featureSource);
// Create a map content and add our shapefile to it
MapContent map = new MapContent();
map.setTitle("Using cached features");
Style style = SLD.createSimpleStyle(featureSource.getSchema());
Layer layer = new FeatureLayer(cache, style);
map.addLayer(layer);
// Now display the map
JMapFrame.showMap(map);
}
// docs end cache
}