protected int getGeometryType(Geometry geometry) {
WkbGeometryType type = WkbGeometryType.forClass(geometry.getClass());
if (type == null)
throw new UnsupportedConversionException(
String.format(
"Can't convert geometries of type %s", geometry.getClass().getCanonicalName()));
return type.getTypeCode();
}
protected int getGeometryType(Geometry<P> geometry) {
// empty geometries have the same representation as an empty geometry collection
if (geometry.isEmpty()) {
return WkbGeometryType.GEOMETRY_COLLECTION.getTypeCode();
}
WkbGeometryType type = WkbGeometryType.forClass(geometry.getClass());
if (type == null) {
throw new UnsupportedConversionException(
String.format(
"Can't convert geometries of type %s", geometry.getClass().getCanonicalName()));
}
return type.getTypeCode();
}
/**
* Build an appropriate <code>Geometry</code>, <code>MultiGeometry</code>, or <code>
* GeometryCollection</code> to contain the <code>Geometry</code>s in it. For example:<br>
*
* <ul>
* <li>If <code>geomList</code> contains a single <code>Polygon</code>, the <code>Polygon</code>
* is returned.
* <li>If <code>geomList</code> contains several <code>Polygon</code>s, a <code>MultiPolygon
* </code> is returned.
* <li>If <code>geomList</code> contains some <code>Polygon</code>s and some <code>LineString
* </code>s, a <code>GeometryCollection</code> is returned.
* <li>If <code>geomList</code> is empty, an empty <code>GeometryCollection</code> is returned
* </ul>
*
* Note that this method does not "flatten" Geometries in the input, and hence if any
* MultiGeometries are contained in the input a GeometryCollection containing them will be
* returned.
*
* @param geomList the <code>Geometry</code>s to combine
* @return a <code>Geometry</code> of the "smallest", "most type-specific" class that can contain
* the elements of <code>geomList</code> .
*/
public Geometry buildGeometry(Collection geomList) {
/** Determine some facts about the geometries in the list */
Class geomClass = null;
boolean isHeterogeneous = false;
boolean hasGeometryCollection = false;
for (Iterator i = geomList.iterator(); i.hasNext(); ) {
Geometry geom = (Geometry) i.next();
Class partClass = geom.getClass();
if (geomClass == null) {
geomClass = partClass;
}
if (partClass != geomClass) {
isHeterogeneous = true;
}
if (geom instanceof GeometryCollection) hasGeometryCollection = true;
}
/** Now construct an appropriate geometry to return */
// for the empty geometry, return an empty GeometryCollection
if (geomClass == null) {
return createGeometryCollection(null);
}
if (isHeterogeneous || hasGeometryCollection) {
return createGeometryCollection(toGeometryArray(geomList));
}
// at this point we know the collection is hetereogenous.
// Determine the type of the result from the first Geometry in the list
// this should always return a geometry, since otherwise an empty collection would have already
// been returned
Geometry geom0 = (Geometry) geomList.iterator().next();
boolean isCollection = geomList.size() > 1;
if (isCollection) {
if (geom0 instanceof Polygon) {
return createMultiPolygon(toPolygonArray(geomList));
} else if (geom0 instanceof LineString) {
return createMultiLineString(toLineStringArray(geomList));
} else if (geom0 instanceof Point) {
return createMultiPoint(toPointArray(geomList));
}
Assert.shouldNeverReachHere("Unhandled class: " + geom0.getClass().getName());
}
return geom0;
}
public static String toWkt(GeometryCollection gc) {
StringBuffer result;
if (gc.isValid() == false) {
result = new StringBuffer("GEOMETRYCOLLECTION EMPTY");
} else {
// 1st figure out if all the collection is the same type
Geometry type = null;
for (Geometry g : gc.getGeometries()) {
if (type == null) {
type = g;
} else if (!type.getClass().isInstance(g)) {
type = null;
break;
}
}
if (type == null) {
result = new StringBuffer("GEOMETRYCOLLECTION EMPTY");
} else {
String strip = null;
if (GeometryCollection.class.isInstance(type)) {
result = new StringBuffer("GEOMETRYCOLLECTION(");
} else if (Point.class.isInstance(type)) {
result = new StringBuffer("MULTIPOINT(");
strip = "POINT";
} else if (LineString.class.isInstance(type)) {
result = new StringBuffer("MULTILINESTRING(");
strip = "LINESTRING";
} else if (Polygon.class.isInstance(type)) {
result = new StringBuffer("MULTIPOLYGON(");
strip = "POLYGON";
} else {
result = new StringBuffer("GEOMETRYCOLLECTION EMPTY");
}
String sep = "";
for (Geometry g : gc.getGeometries()) {
result.append(sep);
// strip the name if it a multi... type
result.append(StringUtils.removeStartIgnoreCase(toWkt(g), strip));
sep = ",";
}
result.append(")");
}
}
return result.toString();
}
public final Geometry transform(Geometry inputGeom) {
this.inputGeom = inputGeom;
this.factory = inputGeom.getFactory();
if (inputGeom instanceof Point) return transformPoint((Point) inputGeom, null);
if (inputGeom instanceof MultiPoint) return transformMultiPoint((MultiPoint) inputGeom, null);
if (inputGeom instanceof LinearRing) return transformLinearRing((LinearRing) inputGeom, null);
if (inputGeom instanceof LineString) return transformLineString((LineString) inputGeom, null);
if (inputGeom instanceof MultiLineString)
return transformMultiLineString((MultiLineString) inputGeom, null);
if (inputGeom instanceof Polygon) return transformPolygon((Polygon) inputGeom, null);
if (inputGeom instanceof MultiPolygon)
return transformMultiPolygon((MultiPolygon) inputGeom, null);
if (inputGeom instanceof GeometryCollection)
return transformGeometryCollection((GeometryCollection) inputGeom, null);
throw new IllegalArgumentException(
"Unknown Geometry subtype: " + inputGeom.getClass().getName());
}
private Geometry editInternal(Geometry geometry, GeometryEditorOperation operation) {
// if client did not supply a GeometryFactory, use the one from the input Geometry
if (factory == null) factory = geometry.getFactory();
if (geometry instanceof GeometryCollection) {
return editGeometryCollection((GeometryCollection) geometry, operation);
}
if (geometry instanceof Polygon) {
return editPolygon((Polygon) geometry, operation);
}
if (geometry instanceof Point) {
return operation.edit(geometry, factory);
}
if (geometry instanceof LineString) {
return operation.edit(geometry, factory);
}
Assert.shouldNeverReachHere("Unsupported Geometry class: " + geometry.getClass().getName());
return null;
}
