/** Transforms a single coordinate point. */
@Override
public DirectPosition transform(final DirectPosition ptSrc, DirectPosition ptDst)
throws MismatchedDimensionException, TransformException {
final int srcDim = source.getDimension();
final int tgtDim = target.getDimension();
if (ptSrc.getDimension() != srcDim) {
throw new MismatchedDimensionException();
}
double[] ordinates = new double[Math.max(srcDim, tgtDim)];
for (int i = 0; i < srcDim; i++) {
ordinates[i] = ptSrc.getOrdinate(i);
}
source.pj.transform(target.pj, ordinates.length, ordinates, 0, 1);
if (ptDst != null) {
if (ptDst.getDimension() != tgtDim) {
throw new MismatchedDimensionException();
}
for (int i = 0; i < tgtDim; i++) {
ptDst.setOrdinate(i, ordinates[i]);
}
} else {
if (ordinates.length != tgtDim) {
ordinates = Arrays.copyOf(ordinates, tgtDim);
}
ptDst = new SimpleDirectPosition(ordinates);
}
return ptDst;
}
/** Formats the specified position. */
static String toString(final DirectPosition position) {
final StringBuilder buffer = new StringBuilder(Classes.getShortClassName(position)).append('[');
final int dimension = position.getDimension();
for (int i = 0; i < dimension; i++) {
if (i != 0) {
buffer.append(", ");
}
buffer.append(position.getOrdinate(i));
}
return buffer.append(']').toString();
}
/**
* Sets this direct position to the given position. If the given position is {@code null}, then
* all ordinate values are set to {@linkplain Double#NaN NaN}.
*
* @param position The new position.
* @since 2.5
*/
public void setPosition(final DirectPosition position) {
final int dimension = getDimension();
if (position != null) {
ensureDimensionMatch("position", position.getDimension(), dimension);
for (int i = 0; i < dimension; i++) {
setOrdinate(i, position.getOrdinate(i));
}
} else {
for (int i = 0; i < dimension; i++) {
setOrdinate(i, Double.NaN);
}
}
}
/** Returns a hash value for the given coordinate. */
static int hashCode(final DirectPosition position) {
final int dimension = position.getDimension();
int code = 1;
for (int i = 0; i < dimension; i++) {
final long bits = Double.doubleToLongBits(position.getOrdinate(i));
code = 31 * code + ((int) (bits) ^ (int) (bits >>> 32));
}
final CoordinateReferenceSystem crs = position.getCoordinateReferenceSystem();
if (crs != null) {
code += crs.hashCode();
}
return code;
}
/**
* Returns {@code true} if the specified object is also a {@linkplain DirectPosition direct
* position} with equals {@linkplain #getCoordinate coordinate} and {@linkplain
* #getCoordinateReferenceSystem CRS}.
*
* @param object The object to compare with this position.
* @return {@code true} if the given object is equals to this position.
*/
@Override
public boolean equals(final Object object) {
if (object instanceof DirectPosition) {
final DirectPosition that = (DirectPosition) object;
final int dimension = getDimension();
if (dimension == that.getDimension()) {
for (int i = 0; i < dimension; i++) {
if (!Utilities.equals(this.getOrdinate(i), that.getOrdinate(i))) {
return false;
}
}
if (Utilities.equals(
this.getCoordinateReferenceSystem(), that.getCoordinateReferenceSystem())) {
assert hashCode() == that.hashCode() : this;
return true;
}
}
}
return false;
}
