/** @return layer's units */
private Unit<?> getLayerUnits(final ILayer layer) {
CoordinateReferenceSystem crs = LayerUtil.getCrs(layer);
Unit<?> units = GeoToolsUtils.getDefaultCRSUnit(crs);
return units;
}
/**
* Traverses the FeatureCollection<SimpleFeatureType, SimpleFeature> <code>selection</code>
* creating a buffered geometry on each SimpleFeature's default geometry and stores the result in
* a new SimpleFeature on the <code>target</code> FeatureStore.
*
* <p>Note the buffer computation is made with a slightly {@link BufferOp modified version} of the
* JTS <code>BufferOp</code> in order to allow the operation to be cancelled while inside the
* buffer computation.
*
* @param params buffer parameters
* @param selection source layer's selected features in its native CRS
* @throws SOProcessException if {@link #createBufferedFeature(SimpleFeature, SimpleFeatureType,
* Geometry)} fails
* @throws IOException if it is thrown while adding the resulting features to the target
* FeatureStore<SimpleFeatureType, SimpleFeature> or while commiting the transaction
* @throws InterruptedException if the user cancelled the operation
*/
private void performBuffer(
IBufferParameters params, FeatureCollection<SimpleFeatureType, SimpleFeature> selection)
throws SOProcessException, InterruptedException {
assert selection != null;
final int featureCount = selection.size();
final ILayer sourceLayer = this.sourceLayer;
final CoordinateReferenceSystem sourceCrs = LayerUtil.getCrs(sourceLayer);
final CoordinateReferenceSystem mapCrs = MapUtil.getCRS(sourceLayer.getMap());
final CoordinateReferenceSystem targetCrs =
this.targetStore.getSchema().getDefaultGeometry().getCRS();
final Unit sourceUnits = GeoToolsUtils.getDefaultCRSUnit(mapCrs);
final Unit targetUnits = params.getUnitsOfMeasure();
final int quadSegments = params.getQuadrantSegments().intValue();
final Double width = params.getWidth().doubleValue();
SimpleFeature sourceFeature = null;
// the one to use if params.isMergeGeometry() == true
Geometry mergedGeometry = null;
FeatureIterator<SimpleFeature> iterator = null;
try {
int processingCount = 0;
Geometry geometry;
String subTaskName;
iterator = selection.features();
while (iterator.hasNext()) {
processingCount++;
subTaskName =
MessageFormat.format(
Messages.BufferProcess_subTask_BufferingFeatureN, processingCount, featureCount);
getMonitor().subTask(subTaskName);
checkCancelation();
sourceFeature = iterator.next();
geometry = (Geometry) sourceFeature.getDefaultGeometry();
geometry = GeoToolsUtils.reproject(geometry, sourceCrs, mapCrs);
geometry =
makeBufferGeometry(
geometry, width, sourceUnits, targetUnits, quadSegments, getMonitor());
geometry = GeoToolsUtils.reproject(geometry, mapCrs, targetCrs);
checkCancelation();
if (params.isMergeGeometries()) {
if (mergedGeometry == null) {
mergedGeometry = geometry;
} else {
mergedGeometry = mergedGeometry.union(geometry);
}
} else {
createAndStoreBufferedFeature(sourceFeature, geometry, this.targetStore);
}
getMonitor().worked(1);
}
checkCancelation();
if (params.isMergeGeometries()) {
createAndStoreBufferedFeature(null, mergedGeometry, this.targetStore);
}
getMonitor().subTask(Messages.BufferProcess_subtastCommittingTransaction);
} catch (OperationNotFoundException e) {
String message =
MessageFormat.format(
Messages.BufferProcess_failed_transforming, sourceFeature.getID(), e.getMessage());
throw new SOProcessException(message, e);
} catch (TransformException e) {
String message =
MessageFormat.format(
Messages.BufferProcess_failed_transforming_feature_to_crs,
sourceFeature.getID(),
e.getMessage());
throw new SOProcessException(message, e);
} finally {
if (iterator != null) iterator.close();
getMonitor().done();
}
}
public UndoableMapCommand getCommand(EditToolHandler handler) {
final PrimitiveShape currentShape = handler.getCurrentShape();
final ILayer editLayer = handler.getEditLayer();
// need to use map coordinates in order to avoid
// possible inconsistencies between what the user
// drawn and the projected result
GeometryFactory gf = new GeometryFactory();
CoordinateReferenceSystem layerCrs = LayerUtil.getCrs(editLayer);
CoordinateReferenceSystem mapCrs = editLayer.getMap().getViewportModel().getCRS();
Point p1 = gf.createPoint(currentShape.getCoord(0));
Point p2 = gf.createPoint(currentShape.getCoord(1));
Point p3 = gf.createPoint(currentShape.getCoord(2));
try {
p1 = (Point) GeoToolsUtils.reproject(p1, layerCrs, mapCrs);
p2 = (Point) GeoToolsUtils.reproject(p2, layerCrs, mapCrs);
p3 = (Point) GeoToolsUtils.reproject(p3, layerCrs, mapCrs);
} catch (OperationNotFoundException onfe) {
throw new IllegalStateException(
"Could not reproject to map crs:" + onfe.getLocalizedMessage(), onfe);
} catch (TransformException te) {
throw new IllegalStateException(
"Could not reproject to map crs:" + te.getLocalizedMessage(), te);
}
ArcBuilder builder = new ArcBuilder();
builder.setPoints(p1.getX(), p1.getY(), p2.getX(), p2.getY(), p3.getX(), p3.getY());
// TODO: especificar la cantidad de segmentos por cuadrante
// mediante una preferencia
Geometry geom = builder.getGeometry(15);
if (geom == null) {
throw new IllegalStateException("null geom");
}
// backproject resulting geom from map crs to layer's crs
try {
geom = GeoToolsUtils.reproject(geom, mapCrs, layerCrs);
} catch (OperationNotFoundException onfe) {
throw new IllegalStateException(
"Could not reproject back to data crs:" + onfe.getLocalizedMessage(), onfe);
} catch (TransformException te) {
throw new IllegalStateException(
"Could not reproject back to data crs:" + te.getLocalizedMessage(), te);
}
EditCommandFactory editCmdFac = AppGISMediator.getEditCommandFactory();
ILayer layer = editLayer;
SimpleFeatureType schema = layer.getSchema();
SimpleFeature feature;
try {
feature = SimpleFeatureBuilder.build(schema, (Object[]) null, null);
Class type = schema.getDefaultGeometry().getType().getBinding();
geom = GeometryUtil.adapt(geom, type);
feature.setDefaultGeometry(geom);
} catch (IllegalAttributeException e) {
// consider using the bubble feedback
throw new IllegalStateException("Could not create Arc:" + e, e);
}
UndoableMapCommand command = editCmdFac.createAddFeatureCommand(feature, layer);
handler.setCurrentShape(null);
handler.setCurrentState(EditState.NONE);
return command;
}