/**
* Transforms a LinearRing. The transformation of a LinearRing may result in a coordinate sequence
* which does not form a structurally valid ring (i.e. a degnerate ring of 3 or fewer points). In
* this case a LineString is returned. Subclasses may wish to override this method and check for
* this situation (e.g. a subclass may choose to eliminate degenerate linear rings)
*
* @param geom the ring to simplify
* @param parent the parent geometry
* @return a LinearRing if the transformation resulted in a structurally valid ring
* @return a LineString if the transformation caused the LinearRing to collapse to 3 or fewer
* points
*/
protected Geometry transformLinearRing(LinearRing geom, Geometry parent) {
CoordinateSequence seq = transformCoordinates(geom.getCoordinateSequence(), geom);
if (seq == null) return factory.createLinearRing((CoordinateSequence) null);
int seqSize = seq.size();
// ensure a valid LinearRing
if (seqSize > 0 && seqSize < 4 && !preserveType) return factory.createLineString(seq);
return factory.createLinearRing(seq);
}
/**
* Creates a MultiPoint using the given CoordinateSequence. A a null or empty CoordinateSequence
* will create an empty MultiPoint.
*
* @param coordinates a CoordinateSequence (possibly empty), or <code>null</code>
* @return a MultiPoint object
*/
public MultiPoint createMultiPoint(CoordinateSequence coordinates) {
if (coordinates == null) {
return createMultiPoint(new Point[0]);
}
Point[] points = new Point[coordinates.size()];
for (int i = 0; i < coordinates.size(); i++) {
points[i] = createPoint(coordinates.getCoordinate(i));
}
return createMultiPoint(points);
}
private CoordinateSequence readCoordinateSequence(int size) throws IOException {
CoordinateSequence seq = csFactory.create(size, inputDimension);
int targetDim = seq.getDimension();
if (targetDim > inputDimension) targetDim = inputDimension;
for (int i = 0; i < size; i++) {
readCoordinate();
for (int j = 0; j < targetDim; j++) {
seq.setOrdinate(i, j, ordValues[j]);
}
}
return seq;
}
/**
* Creates a {@link MultiPoint} using the points in the given {@link CoordinateSequence}. A <code>
* null</code> or empty CoordinateSequence creates an empty MultiPoint.
*
* @param coordinates a CoordinateSequence (possibly empty), or <code>null</code>
* @return a MultiPoint geometry
*/
public MultiPoint createMultiPoint(CoordinateSequence coordinates) {
if (coordinates == null) {
return createMultiPoint(new Point[0]);
}
Point[] points = new Point[coordinates.size()];
for (int i = 0; i < coordinates.size(); i++) {
CoordinateSequence ptSeq =
getCoordinateSequenceFactory().create(1, coordinates.getDimension());
CoordinateSequences.copy(coordinates, i, ptSeq, 0, 1);
points[i] = createPoint(ptSeq);
}
return createMultiPoint(points);
}
public Geometry densify(double segLength) {
newCoords = new CoordinateList();
CoordinateSequence seq = inputLine.getCoordinateSequence();
Coordinate p0 = new Coordinate();
Coordinate p1 = new Coordinate();
seq.getCoordinate(0, p0);
newCoords.add(new Coordinate(p0));
for (int i = 0; i < seq.size() - 1; i++) {
seq.getCoordinate(i, p0);
seq.getCoordinate(i + 1, p1);
densify(p0, p1, segLength);
}
Coordinate[] newPts = newCoords.toCoordinateArray();
return inputLine.getFactory().createLineString(newPts);
}
/**
* Creates a new sequence based on a deep copy of the given {@link CoordinateSequence}.
*
* @param coordSeq the coordinate sequence that will be copied.
*/
public DefaultCoordinateSequence(CoordinateSequence coordSeq) {
coordinates = new Coordinate[coordSeq.size()];
for (int i = 0; i < coordinates.length; i++) {
coordinates[i] = coordSeq.getCoordinateCopy(i);
}
}
private CoordinateSequence readCoordinateSequenceLineString(int size) throws IOException {
CoordinateSequence seq = readCoordinateSequence(size);
if (isStrict) return seq;
if (seq.size() == 0 || seq.size() >= 2) return seq;
return CoordinateSequences.extend(csFactory, seq, 2);
}
