Examples with GeometryTransformer org.geotoolkit.geometry.jts.transform.GeometryTransformer used on opensource projects

Example 1 with GeometryTransformer

use of org.geotoolkit.geometry.jts.transform.GeometryTransformer in project geotoolkit by Geomatys.

the class FeatureStreamsTest method testTransformFeatureIterator.

@Test
public void testTransformFeatureIterator() throws DataStoreException {
    FeatureType originalType = buildOriginalFT();
    final FeatureTypeBuilder builder = new FeatureTypeBuilder();
    final GenericName name = NamesExt.create("http://test.com", "TestSchema");
    builder.setName(name);
    builder.addAttribute(String.class).setName(AttributeConvention.IDENTIFIER_PROPERTY);
    builder.addAttribute(LineString.class).setName("att_geom").setCRS(CommonCRS.WGS84.normalizedGeographic()).addRole(AttributeRole.DEFAULT_GEOMETRY);
    final FeatureType type = builder.build();
    final LineString geom = GF.createLineString(new Coordinate[] { new Coordinate(0, 0), // dx 15 , dy 12
    new Coordinate(15, 12), // dx 7 , dy 16
    new Coordinate(8, 28), // dx 1 , dy 3
    new Coordinate(9, 31), // dx 14 , dy 20
    new Coordinate(-5, 11), // dx 4 , dy 2
    new Coordinate(-1, 9) });
    final FeatureCollection collection = FeatureStoreUtilities.collection("id", type);
    Feature sf = type.newInstance();
    sf.setPropertyValue("att_geom", geom);
    collection.add(sf);
    // get the reader -------------------------------------------------------
    Query query = new Query(originalType.getName());
    FeatureReader reader = collection.getSession().getFeatureStore().getFeatureReader(query);
    // create the decimate reader -------------------------------------------
    final Hints hints = new Hints();
    GeometryTransformer decim = new GeometryScaleTransformer(10, 10);
    final TransformMapper ttype = new TransformMapper(reader.getFeatureType(), decim);
    FeatureReader retyped = FeatureStreams.decorate(reader, ttype, hints);
    assertTrue(retyped.hasNext());
    LineString decimated = (LineString) retyped.next().getPropertyValue(AttributeConvention.GEOMETRY);
    assertFalse(retyped.hasNext());
    retyped.close();
    assertEquals(4, decimated.getNumPoints());
    assertEquals(geom.getGeometryN(0).getCoordinate(), decimated.getGeometryN(0).getCoordinate());
    assertEquals(geom.getGeometryN(1).getCoordinate(), decimated.getGeometryN(1).getCoordinate());
    assertEquals(geom.getGeometryN(2).getCoordinate(), decimated.getGeometryN(2).getCoordinate());
    assertEquals(geom.getGeometryN(4).getCoordinate(), decimated.getGeometryN(3).getCoordinate());
    // check the original geometry has not been modified
    reader = collection.getSession().getFeatureStore().getFeatureReader(query);
    assertTrue(reader.hasNext());
    LineString notDecimated = (LineString) reader.next().getPropertyValue(AttributeConvention.GEOMETRY);
    assertEquals(6, notDecimated.getNumPoints());
    assertFalse(reader.hasNext());
    reader.close();
    // same test but with reuse hint ---------------------------------------
    reader = collection.getSession().getFeatureStore().getFeatureReader(query);
    decim = new GeometryScaleTransformer(10, 10);
    retyped = FeatureStreams.decorate(reader, new TransformMapper(reader.getFeatureType(), decim), hints);
    assertTrue(retyped.hasNext());
    decimated = (LineString) retyped.next().getPropertyValue(AttributeConvention.GEOMETRY);
    assertFalse(retyped.hasNext());
    retyped.close();
    assertEquals(4, decimated.getNumPoints());
    assertEquals(geom.getGeometryN(0).getCoordinate(), decimated.getGeometryN(0).getCoordinate());
    assertEquals(geom.getGeometryN(1).getCoordinate(), decimated.getGeometryN(1).getCoordinate());
    assertEquals(geom.getGeometryN(2).getCoordinate(), decimated.getGeometryN(2).getCoordinate());
    assertEquals(geom.getGeometryN(4).getCoordinate(), decimated.getGeometryN(3).getCoordinate());
    // check the original geometry has not been modified
    reader = collection.getSession().getFeatureStore().getFeatureReader(query);
    assertTrue(reader.hasNext());
    notDecimated = (LineString) reader.next().getPropertyValue(AttributeConvention.GEOMETRY);
    assertEquals(6, notDecimated.getNumPoints());
    assertFalse(reader.hasNext());
    reader.close();
}