How to use

norm

method

in

com.vividsolutions.jts.geom.Geometry

/**
 * Tests whether two geometries are exactly equal
 * in their normalized forms.
 * This is a convenience method which creates normalized
 * versions of both geometries before computing
 * {@link #equalsExact(Geometry)}.
 * <p>
 * This method is relatively expensive to compute.  
 * For maximum performance, the client 
 * should instead perform normalization on the individual geometries
 * at an appropriate point during processing.
 * 
 * @param g a Geometry
 * @return true if the input geometries are exactly equal in their normalized form
 */
public boolean equalsNorm(Geometry g)
{
 if (g == null) return false;
 return norm().equalsExact(g.norm());
}
 

/**
 * Tests whether two geometries are exactly equal
 * in their normalized forms.
 * This is a convenience method which creates normalized
 * versions of both geometries before computing
 * {@link #equalsExact(Geometry)}.
 * <p>
 * This method is relatively expensive to compute.  
 * For maximum performance, the client 
 * should instead perform normalization on the individual geometries
 * at an appropriate point during processing.
 * 
 * @param g a Geometry
 * @return true if the input geometries are exactly equal in their normalized form
 */
public boolean equalsNorm(Geometry g)
{
 if (g == null) return false;
 return norm().equalsExact(g.norm());
}
 

/**
 * Check Geometry type,X,Y,Z and SRID
 *
 * @param expectedWKT Expected value, in WKT
 * @param expectedSRID Expected SRID code,
 * @param valueObject Test value geometry ex rs.getObject(i)
 * @throws SQLException If WKT or WKB is not valid
 */
public static void assertGeometryEquals(String expectedWKT,int expectedSRID, Object valueObject) throws SQLException {
  if (expectedWKT == null) {
    assertNull(valueObject);
  } else {
    ValueGeometry expected = ValueGeometry.get(expectedWKT, expectedSRID);
    ValueGeometry actual = ValueGeometry.getFromGeometry(((Geometry)valueObject).norm());
    expected = ValueGeometry.getFromGeometry(expected.getGeometry().norm());
    String moreInfo = "";
    if(!actual.equals(expected)) {
      if(!GeometryCollection.class.getName().equals(expected.getGeometry().getClass().getName()) &&
          !GeometryCollection.class.getName().equals(actual.getGeometry().getClass().getName()) &&
          expected.getGeometry().equals(actual.getGeometry())) {
        moreInfo = "\n But are topologically equals";
      }
    }
    assertEquals("Expected:\n" + expected.getWKT() + "\nActual:\n" + actual.getWKT()+moreInfo, expected, actual);
  }
}
/**

/**
 * Check Geometry type,X,Y,Z and SRID
 *
 * @param expectedWKT Expected value, in WKT
 * @param expectedSRID Expected SRID code,
 * @param valueObject Test value geometry ex rs.getObject(i)
 * @throws SQLException If WKT or WKB is not valid
 */
public static void assertGeometryEquals(String expectedWKT,int expectedSRID, Object valueObject) throws SQLException {
  if (expectedWKT == null) {
    assertNull(valueObject);
  } else {
    ValueGeometry expected = ValueGeometry.get(expectedWKT, expectedSRID);
    ValueGeometry actual = ValueGeometry.getFromGeometry(((Geometry)valueObject).norm());
    expected = ValueGeometry.getFromGeometry(expected.getGeometry().norm());
    String moreInfo = "";
    if(!actual.equals(expected)) {
      if(!GeometryCollection.class.getName().equals(expected.getGeometry().getClass().getName()) &&
          !GeometryCollection.class.getName().equals(actual.getGeometry().getClass().getName()) &&
          expected.getGeometry().equals(actual.getGeometry())) {
        moreInfo = "\n But are topologically equals";
      }
    }
    assertEquals("Expected:\n" + expected.getWKT() + "\nActual:\n" + actual.getWKT()+moreInfo, expected, actual);
  }
}
/**

@Test
public void testEnforcesPolygonNormalization() throws Exception {
  // outer ring in cw order, inner rings in ccw order
  String normalizedWKT = "POLYGON((0 0, 0 9, 9 9, 9 0, 0 0), (3 3, 6 3, 6 6, 3 6, 3 3))";
  // outer ring in ccw order, inner rings in cc order
  String reversedWKT = "POLYGON((0 0, 9 0, 9 9, 0 9, 0 0), (3 3, 3 6, 6 6, 6 3, 3 3))";
  Geometry normalized = new WKTReader().read(normalizedWKT);
  Geometry reversed = new WKTReader().read(reversedWKT);
  assertTrue(normalized.equalsExact(normalized.norm()));
  assertFalse(reversed.equalsExact(reversed.norm()));
  RevFeatureBuilder builder = builder();
  RevFeature norm = builder.addValue(normalized).build();
  RevFeature rev = builder.reset().addValue(reversed).build();
  Geometry expected = (Geometry) norm.getValues().get(0).get();
  Geometry actual = (Geometry) rev.getValues().get(0).get();
  assertTrue(normalized.equalsExact(expected));
  assertTrue(normalized.equalsExact(actual));
}

assertFalse(normalized.equalsExact(normalized.norm()));// the linestring is not normalized
assertTrue(normalized.getGeometryN(2).equalsExact(normalized.getGeometryN(2).norm()));
assertFalse(reversed.getGeometryN(2).equalsExact(reversed.getGeometryN(2).norm()));