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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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package com.spatial4j.core.shape;
import com.carrotsearch.randomizedtesting.RandomizedContext;
import com.carrotsearch.randomizedtesting.annotations.Repeat;
import com.spatial4j.core.context.jts.JtsSpatialContext;
import com.spatial4j.core.context.jts.JtsSpatialContextFactory;
import com.spatial4j.core.io.jts.JtsWktShapeParser;
import com.spatial4j.core.shape.impl.PointImpl;
import com.spatial4j.core.shape.jts.JtsGeometry;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateFilter;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.IntersectionMatrix;
import org.junit.Test;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.ParseException;
import java.util.Random;
import static com.spatial4j.core.shape.SpatialRelation.CONTAINS;
import static com.spatial4j.core.shape.SpatialRelation.DISJOINT;
import static com.spatial4j.core.shape.SpatialRelation.INTERSECTS;
/** Tests {@link com.spatial4j.core.shape.jts.JtsGeometry} and some other code related
* to {@link com.spatial4j.core.context.jts.JtsSpatialContext}.
*/
public class JtsGeometryTest extends AbstractTestShapes {
private final String POLY_STR = "Polygon((-10 30, -40 40, -10 -20, 40 20, 0 0, -10 30))";
private JtsGeometry POLY_SHAPE;
private final int DL_SHIFT = 180;//since POLY_SHAPE contains 0 0, I know a shift of 180 will make it cross the DL.
private JtsGeometry POLY_SHAPE_DL;//POLY_SHAPE shifted by DL_SHIFT to cross the dateline
public JtsGeometryTest() throws ParseException {
super(JtsSpatialContext.GEO);
POLY_SHAPE = (JtsGeometry) ctx.readShapeFromWkt(POLY_STR);
if (ctx.isGeo()) {
POLY_SHAPE_DL = shiftPoly(POLY_SHAPE, DL_SHIFT);
assertTrue(POLY_SHAPE_DL.getBoundingBox().getCrossesDateLine());
}
}
private JtsGeometry shiftPoly(JtsGeometry poly, final int lon_shift) throws ParseException {
final Random random = RandomizedContext.current().getRandom();
Geometry pGeom = poly.getGeom();
assertTrue(pGeom.isValid());
//shift 180 to the right
pGeom = (Geometry) pGeom.clone();
pGeom.apply(new CoordinateFilter() {
@Override
public void filter(Coordinate coord) {
coord.x = normX(coord.x + lon_shift);
if (ctx.isGeo() && Math.abs(coord.x) == 180 && random.nextBoolean())
coord.x = - coord.x;//invert sign of dateline boundary some of the time
}
});
pGeom.geometryChanged();
assertFalse(pGeom.isValid());
return (JtsGeometry) ctx.readShapeFromWkt(pGeom.toText());
}
@Test
public void testRelations() throws ParseException {
testRelations(false);
testRelations(true);
}
public void testRelations(boolean prepare) throws ParseException {
assert !((JtsWktShapeParser)ctx.getWktShapeParser()).isAutoIndex();
//base polygon
JtsGeometry base = (JtsGeometry) ctx.readShapeFromWkt("POLYGON((0 0, 10 0, 5 5, 0 0))");
//shares only "10 0" with base
JtsGeometry polyI = (JtsGeometry) ctx.readShapeFromWkt("POLYGON((10 0, 20 0, 15 5, 10 0))");
//within base: differs from base by one point is within
JtsGeometry polyW = (JtsGeometry) ctx.readShapeFromWkt("POLYGON((0 0, 9 0, 5 5, 0 0))");
//a boundary point of base
Point pointB = ctx.makePoint(0, 0);
//a shared boundary line of base
JtsGeometry lineB = (JtsGeometry) ctx.readShapeFromWkt("LINESTRING(0 0, 10 0)");
//a line sharing only one point with base
JtsGeometry lineI = (JtsGeometry) ctx.readShapeFromWkt("LINESTRING(10 0, 20 0)");
if (prepare) base.index();
assertRelation(CONTAINS, base, base);//preferred result as there is no EQUALS
assertRelation(INTERSECTS, base, polyI);
assertRelation(CONTAINS, base, polyW);
assertRelation(CONTAINS, base, pointB);
assertRelation(CONTAINS, base, lineB);
assertRelation(INTERSECTS, base, lineI);
if (prepare) lineB.index();
assertRelation(CONTAINS, lineB, lineB);//line contains itself
assertRelation(CONTAINS, lineB, pointB);
}
@Test
public void testEmpty() throws ParseException {
Shape emptyGeom = ctx.readShapeFromWkt("POLYGON EMPTY");
testEmptiness(emptyGeom);
assertRelation("EMPTY", DISJOINT, emptyGeom, POLY_SHAPE);
}
@Test
public void testArea() {
//simple bbox
Rectangle r = randomRectangle(20);
JtsSpatialContext ctxJts = (JtsSpatialContext) ctx;
JtsGeometry rPoly = ctxJts.makeShape(ctxJts.getGeometryFrom(r), false, false);
assertEquals(r.getArea(null), rPoly.getArea(null), 0.0);
assertEquals(r.getArea(ctx), rPoly.getArea(ctx), 0.000001);//same since fills 100%
assertEquals(1300, POLY_SHAPE.getArea(null), 0.0);
//fills 27%
assertEquals(0.27, POLY_SHAPE.getArea(ctx) / POLY_SHAPE.getBoundingBox().getArea(ctx), 0.009);
assertTrue(POLY_SHAPE.getBoundingBox().getArea(ctx) > POLY_SHAPE.getArea(ctx));
}
@Test
@Repeat(iterations = 100)
public void testPointAndRectIntersect() {
Rectangle r = randomRectangle(5);
assertJtsConsistentRelate(r);
assertJtsConsistentRelate(r.getCenter());
}
@Test
public void testRegressions() {
assertJtsConsistentRelate(new PointImpl(-10, 4, ctx));//PointImpl not JtsPoint, and CONTAINS
assertJtsConsistentRelate(new PointImpl(-15, -10, ctx));//point on boundary
assertJtsConsistentRelate(ctx.makeRectangle(135, 180, -10, 10));//180 edge-case
}
@Test
public void testWidthGreaterThan180() throws ParseException {
//does NOT cross the dateline but is a wide shape >180
JtsGeometry jtsGeo = (JtsGeometry) ctx.readShapeFromWkt("POLYGON((-161 49, 0 49, 20 49, 20 89.1, 0 89.1, -161 89.2, -161 49))");
assertEquals(161+20,jtsGeo.getBoundingBox().getWidth(), 0.001);
//shift it to cross the dateline and check that it's still good
jtsGeo = shiftPoly(jtsGeo, 180);
assertEquals(161+20,jtsGeo.getBoundingBox().getWidth(), 0.001);
}
private void assertJtsConsistentRelate(Shape shape) {
IntersectionMatrix expectedM = POLY_SHAPE.getGeom().relate(((JtsSpatialContext) ctx).getGeometryFrom(shape));
SpatialRelation expectedSR = JtsGeometry.intersectionMatrixToSpatialRelation(expectedM);
//JTS considers a point on a boundary INTERSECTS, not CONTAINS
if (expectedSR == SpatialRelation.INTERSECTS && shape instanceof Point)
expectedSR = SpatialRelation.CONTAINS;
assertRelation(null, expectedSR, POLY_SHAPE, shape);
if (ctx.isGeo()) {
//shift shape, set to shape2
Shape shape2;
if (shape instanceof Rectangle) {
Rectangle r = (Rectangle) shape;
shape2 = makeNormRect(r.getMinX() + DL_SHIFT, r.getMaxX() + DL_SHIFT, r.getMinY(), r.getMaxY());
} else if (shape instanceof Point) {
Point p = (Point) shape;
shape2 = ctx.makePoint(normX(p.getX() + DL_SHIFT), p.getY());
} else {
throw new RuntimeException(""+shape);
}
assertRelation(null, expectedSR, POLY_SHAPE_DL, shape2);
}
}
@Test
public void testRussia() throws IOException, ParseException {
final String wktStr = readFirstLineFromRsrc("/russia.wkt.txt");
//Russia exercises JtsGeometry fairly well because of these characteristics:
// * a MultiPolygon
// * crosses the dateline
// * has coordinates needing normalization (longitude +180.000xxx)
//TODO THE RUSSIA TEST DATA SET APPEARS CORRUPT
// But this test "works" anyhow, and exercises a ton.
//Unexplained holes revealed via KML export:
// TODO Test contains: 64°12'44.82"N 61°29'5.20"E
// 64.21245 61.48475
// FAILS
//assertRelation(null,SpatialRelation.CONTAINS, shape, ctx.makePoint(61.48, 64.21));
JtsSpatialContextFactory factory = new JtsSpatialContextFactory();
factory.normWrapLongitude = true;
JtsSpatialContext ctx = factory.newSpatialContext();
Shape shape = ctx.readShapeFromWkt(wktStr);
//System.out.println("Russia Area: "+shape.getArea(ctx));
}
@Test
public void testFiji() throws IOException, ParseException {
//Fiji is a group of islands crossing the dateline.
String wktStr = readFirstLineFromRsrc("/fiji.wkt.txt");
JtsSpatialContextFactory factory = new JtsSpatialContextFactory();
factory.normWrapLongitude = true;
JtsSpatialContext ctx = factory.newSpatialContext();
Shape shape = ctx.readShapeFromWkt(wktStr);
assertRelation(null,SpatialRelation.CONTAINS, shape,
ctx.makePoint(-179.99,-16.9));
assertRelation(null,SpatialRelation.CONTAINS, shape,
ctx.makePoint(+179.99,-16.9));
assertTrue(shape.getBoundingBox().getWidth() < 5);//smart bbox
System.out.println("Fiji Area: "+shape.getArea(ctx));
}
private String readFirstLineFromRsrc(String wktRsrcPath) throws IOException {
InputStream is = getClass().getResourceAsStream(wktRsrcPath);
assertNotNull(is);
try {
BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
return br.readLine();
} finally {
is.close();
}
}
}