/**
*
* Copyright 2015 sourceforge.
*
* Licensed 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.
*/
package org.gwtopenmaps.openlayers.client.geometry;
import com.google.gwt.core.client.JsArray;
import org.gwtopenmaps.openlayers.client.*;
import org.gwtopenmaps.openlayers.client.geometry.responsability.GWTOLGeometryHandlerManager;
import org.gwtopenmaps.openlayers.client.util.JSObject;
/**
* @author Edwin Commandeur - Atlis EJS
* @author Curtis Jensen
* @author prsebastian
*
*/
public class Geometry extends OpenLayersObjectWrapper {
public static final GWTOLGeometryHandlerManager geometryHandlerManager = new GWTOLGeometryHandlerManager();
//
public static final String LINEARRING_CLASS_NAME = "OpenLayers.Geometry.LinearRing";
public static final String LINESTRING_CLASS_NAME = "OpenLayers.Geometry.LineString";
public static final String POINT_CLASS_NAME = "OpenLayers.Geometry.Point";
public static final String MULTI_POINT_CLASS_NAME = "OpenLayers.Geometry.MultiPoint";
public static final String POLYGON_CLASS_NAME = "OpenLayers.Geometry.Polygon";
public static final String MULTI_POLYGON_CLASS_NAME = "OpenLayers.Geometry.MultiPolygon";
public static final String MULTI_LINE_STRING_CLASS_NAME = "OpenLayers.Geometry.MultiLineString";
public static final String CURVE_CLASS_NAME = "OpenLayers.Geometry.Curve";
// TODO more class names
/**
* The distance between this geometry and the target. If details is true,
* the return will be an object with distance, x0, y0, x1, and x2
* properties. The x0 and y0 properties represent the coordinates of the
* closest point on this geometry. The x1 and y1 properties represent the
* coordinates of the closest point on the target geometry.
*/
public interface Distance {
/**
* @return The distance between this geometry and the target.
*/
public double getDistance();
/**
* @return x coordinate of the closest point on this geometry.
* <code>null</code> if no details available.
*/
public Double getX0();
/**
* @return y coordinate of the closest point on this geometry.
* <code>null</code> if no details available.
*/
public Double getY0();
/**
* @return x coordinate of the closest point on the target geometry.
* <code>null</code> if no details available.
*/
public Double getX1();
/**
* @return y coordinate of the closest point on the target geometry.
* <code>null</code> if no details available.
*/
public Double getY1();
}
private class DistanceImpl implements Distance {
private double distance;
private Double x0 = null;
private Double y0 = null;
private Double x1 = null;
private Double y1 = null;
public DistanceImpl(double distance) {
this.distance = distance;
}
public double getDistance() {
return distance;
}
public Double getX0() {
return x0;
}
public void setX0(Double x0) {
this.x0 = x0;
}
public Double getY0() {
return y0;
}
public void setY0(Double y0) {
this.y0 = y0;
}
public Double getX1() {
return x1;
}
public void setX1(Double x1) {
this.x1 = x1;
}
public Double getY1() {
return y1;
}
public void setY1(Double y1) {
this.y1 = y1;
}
}
public static Geometry narrowToGeometry(JSObject element) {
// return null on null
if (element == null) {
return null;
}
// try to return an instance of the concrete GWT class instead of a generic Geometry instance
// this will allow callers to directly use the returned instance without allocating another instance
// of a GWT class
String className = element.getPropertyAsString("CLASS_NAME");
return geometryHandlerManager.buildGeometry(className, element);
}
public static Geometry fromWKT(String wkt) {
return narrowToGeometry(GeometryImpl.fromWKT(wkt));
}
protected Geometry(JSObject element) {
super(element);
}
public void destroy() {
GeometryImpl.destroy(getJSObject());
}
public Bounds getBounds() {
return Bounds.narrowToBounds(GeometryImpl.getBounds(this.getJSObject()));
}
public String toString() {
return GeometryImpl.toString(this.getJSObject());
}
public Geometry clone() {
return narrowToGeometry(GeometryImpl.clone(this.getJSObject()));
}
/**
* Recalculate the bounds for the geometry.
*
*/
public void calculateBounds() {
GeometryImpl.calculateBounds(getJSObject());
}
public double getArea() {
return 0;
}
public double getLength() {
return 0.0;
}
/**
* Set the bounds for this Geometry.
*/
public void setBounds(Bounds bounds) {
GeometryImpl.setBounds(getJSObject(), bounds.getJSObject());
}
/**
* Nullify this components bounds and that of its parent as well.
*/
public void clearBounds() {
GeometryImpl.clearBounds(getJSObject());
}
/**
* Extend the existing bounds to include the new bounds. If geometry’s
* bounds is not yet set, then set a new Bounds.
*/
public void extendBounds(Bounds newBounds) {
GeometryImpl.extendBounds(getJSObject(), newBounds.getJSObject());
}
/**
* Calculate the closest distance between two geometries (on the x-y plane).
*
* @param geometry The target geometry.
* @param options Optional properties for configuring the distance
* calculation.
* @return The distance between this geometry and the target. If details is
* true, the return will be an object with distance, x0, y0, x1, and x2
* properties. The x0 and y0 properties represent the coordinates of the
* closest point on this geometry. The x1 and y1 properties represent the
* coordinates of the closest point on the target geometry.
*/
public Distance distanceTo(Geometry geometry,
JSObject options) {
JSObject distanceJSObject = GeometryImpl.distanceTo(getJSObject(),
geometry.getJSObject(), options);
DistanceImpl distance = new DistanceImpl(
distanceJSObject.getPropertyAsDouble(
"distance"));
if (distanceJSObject.hasProperty("x0")) {
distance.setX0(distanceJSObject.getPropertyAsDouble("x0"));
}
if (distanceJSObject.hasProperty("y0")) {
distance.setY0(distanceJSObject.getPropertyAsDouble("y0"));
}
if (distanceJSObject.hasProperty("x1")) {
distance.setX1(distanceJSObject.getPropertyAsDouble("x1"));
}
if (distanceJSObject.hasProperty("y1")) {
distance.setY1(distanceJSObject.getPropertyAsDouble("y1"));
}
return distance;
}
/**
* Return a list of all points in this geometry.
*
* @param nodes For lines, only return vertices that are endpoints. If
* false, for lines, only vertices that are not endpoints will be returned.
* If not provided, all vertices will be returned.
* @return A list of all vertices in the geometry.
*/
public Point[] getVertices(boolean nodes) {
JsArray<JSObject> vertices = GeometryImpl.getVertices(getJSObject(),
nodes);
Point[] points = new Point[vertices.length()];
for (int i = 0; i < vertices.length(); i++) {
points[i] = new Point(vertices.get(i));
}
return points;
}
/**
* This is only an approximation based on the bounds of the geometry.
*
* @param lonlat
* @param toleranceLon tolerance in Geometric Coords
* @param toleranceLat tolerance in Geographic Coords
* @return Whether or not the geometry is at the specified location
*/
public boolean atPoint(LonLat lonlat,
double toleranceLon,
double toleranceLat) {
return GeometryImpl.atPoint(getJSObject(), lonlat.getJSObject(),
toleranceLon, toleranceLat);
}
/**
* Calculate the centroid of this geometry. This method is defined in
* subclasses.
*
* @return The centroid of the collection
*/
public Point getCentroid() {
return new Point(0, 0);
}
/**
* Translate the x,y properties of the geometry from source to dest.
*
* @param source
* @param dest
*/
public void transform(Projection source,
Projection dest) {
GeometryImpl.transform(getJSObject(), source.getJSObject(),
dest.getJSObject());
}
}