org.opentripplanner.netex.mapping.OpenGisMapper Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of otp Show documentation

The OpenTripPlanner multimodal journey planning system

The newest version!

package org.opentripplanner.netex.mapping;

import java.util.ArrayList;
import java.util.List;
import net.opengis.gml._3.AbstractRingPropertyType;
import net.opengis.gml._3.LinearRingType;
import net.opengis.gml._3.PolygonType;
import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.CoordinateSequence;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.LinearRing;
import org.locationtech.jts.geom.Polygon;
import org.opentripplanner.framework.geometry.CoordinateArrayListSequence;
import org.opentripplanner.framework.geometry.GeometryUtils;

/**
 * This maps from the OpenGIS PolygonType to LocationTech geometry.
 */
class OpenGisMapper {

  static Geometry mapGeometry(PolygonType polygonType) {
    Polygon polygon = new Polygon(
      new LinearRing(
        mapCoordinateSequence(polygonType.getExterior()),
        GeometryUtils.getGeometryFactory()
      ),
      polygonType
        .getInterior()
        .stream()
        .map(c -> new LinearRing(mapCoordinateSequence(c), GeometryUtils.getGeometryFactory()))
        .toArray(LinearRing[]::new),
      GeometryUtils.getGeometryFactory()
    );
    if (!polygon.isValid()) {
      throw new IllegalArgumentException("The polygon has an invalid geometry");
    }
    return polygon;
  }

  private static CoordinateSequence mapCoordinateSequence(
    AbstractRingPropertyType abstractRingPropertyType
  ) {
    List posList =
      ((LinearRingType) abstractRingPropertyType.getAbstractRing().getValue()).getPosList()
        .getValue();

    // Convert a single list of alternating lat/lon values into coordinates
    ArrayList coordinates = new ArrayList<>();
    for (int i = 0; i < posList.size(); i += 2) {
      coordinates.add(new Coordinate(posList.get(i + 1), posList.get(i)));
    }

    return new CoordinateArrayListSequence(coordinates);
  }
}