public void accept()

in baremaps-core/src/main/java/org/apache/baremaps/openstreetmap/function/RelationGeometryBuilder.java [56:101]

32 lines of code
7 McCabe index (conditional complexity)


  public void accept(Relation relation) {
    try {
      var start = System.currentTimeMillis();

      Map<String, Object> tags = relation.getTags();

      // Filter multipolygon geometries
      if (!"multipolygon".equals(tags.get("type"))) {
        return;
      }

      // Filter coastline geometries
      if ("coastline".equals(tags.get("natural"))) {
        return;
      }

      // Prepare outer and inner polygons
      Set<Polygon> outerPolygons = createPolygons(relation, "outer");
      Set<Polygon> innerPolygons = createPolygons(relation, "inner");

      // Merge touching or overlapping inner polygons
      innerPolygons = mergeInnerPolygons(innerPolygons);

      // Do the line work
      List<Polygon> polygons = mergeOuterAndInnerPolygons(outerPolygons, innerPolygons);

      // Set the geometry of the relation
      if (polygons.size() == 1) {
        Polygon polygon = polygons.get(0);
        relation.setGeometry(polygon);
      } else if (polygons.size() > 1) {
        MultiPolygon multiPolygon =
            GEOMETRY_FACTORY_WGS84.createMultiPolygon(polygons.toArray(new Polygon[0]));
        relation.setGeometry(multiPolygon);
      }

      var end = System.currentTimeMillis();
      var duration = end - start;
      if (duration > 60 * 1000) {
        logger.debug("Relation #{} processed in {} ms", relation.id(), duration);
      }
    } catch (Exception e) {
      logger.debug("Unable to build the geometry for relation #" + relation.id(), e);
      relation.setGeometry(GEOMETRY_FACTORY_WGS84.createEmpty(0));
    }
  }