Shouldn't
for( Layer l : mc.layers() )
mc.removeLayer(l);
give a ConcurrentModification-Exception?
>>>
Von: "Julian Hagenauer" <[email protected]>
An:<[email protected]>
Datum: 12.07.2016 11:50
Betreff: [Geotools-gt2-users] Synchronization issue when updating MapContent?
Hi again,
I stumbled again upon an issue with my small test program. The program does
nothing but create repeatedly a collection of points, clear all existing
MapLayers, and add a new layer consisting of the collection.
However, the programm hangs after about 265 iterations. I assume on your
machine this number might vary. I am using geotools 15-RC1.
Here is the small program:
public class JMapPaneTest extends JFrame {
public JMapPane mp;
public JMapPaneTest() {
mp = new JMapPane();
mp.setMapContent(new MapContent());
add(mp);
setSize(400,400);
setVisible(true);
}
public void updateMP() {
GeometryFactory gf = new GeometryFactory();
SimpleFeatureTypeBuilder typeBuilder = new SimpleFeatureTypeBuilder();
typeBuilder.setName("Points");
typeBuilder.add("the_geom",Point.class);
SimpleFeatureBuilder featureBuilder = new
SimpleFeatureBuilder(typeBuilder.buildFeatureType());
Random r = new Random();
DefaultFeatureCollection fc = new DefaultFeatureCollection();
for( int i = 0; i < 1000; i++ ) {
Point p = gf.createPoint(new Coordinate(r.nextDouble(),r.nextDouble()));
featureBuilder.set("the_geom", p);
fc.add( featureBuilder.buildFeature(""+fc.size()));
}
MapContent mc = mp.getMapContent();
for( Layer l : mc.layers() )
mc.removeLayer(l);
Symbolizer sym = new StyleBuilder().createPointSymbolizer();
mc.addLayer(new FeatureLayer(fc, SLD.wrapSymbolizers(sym)));
mc.setViewport( new MapViewport(fc.getBounds()));
}
public static void main(String[] args) {
JMapPaneTest t = new JMapPaneTest();
for( int i = 0; i < 1000; i++ ) {
System.out.println(i);
t.updateMP();
}
System.exit(1);
}
}
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