/**
* Convenience method for {@link Graphs#findClosestObject}.
*
* @param pos The {@link Point} which is used as reference.
* @param rm The {@link RoadModel} which is searched.
* @param predicate A {@link Predicate} indicating which objects are included in the search.
* @return The closest object in <code>rm</code> to <code>pos</code> which satisfies the <code>
* predicate</code>.
* @see Graphs#findClosestObject
*/
@Nullable
public static RoadUser findClosestObject(Point pos, RoadModel rm, Predicate<RoadUser> predicate) {
final Collection<RoadUser> filtered = Collections2.filter(rm.getObjects(), predicate);
return findClosestObject(pos, rm, filtered);
}
/**
* Convenience method for {@link Graphs#findClosestObject}.
*
* @param pos The {@link Point} which is used as reference.
* @param rm The {@link RoadModel} which is searched.
* @param type The type of object that is searched.
* @param <T> The type of the returned object.
* @return The closest object in <code>rm</code> to <code>pos</code> of type <code>type</code>.
* @see Graphs#findClosestObject
*/
@Nullable
public static <T extends RoadUser> T findClosestObject(
Point pos, RoadModel rm, final Class<T> type) {
return findClosestObject(pos, rm, rm.getObjectsOfType(type));
}
@Override
@Nullable
public Point apply(@Nullable T input) {
return rm.getPosition(verifyNotNull(input));
}
@Override
public boolean apply(@Nullable RoadUser input) {
return Point.distance(model.getPosition(verifyNotNull(input)), position) < radius;
}
/**
* Returns all {@link RoadUser}s of type <code> type</code> in <code>model</code> that are
* <strong>within</strong> a bird-flight distance of <code>radius</code> to <code>position</code>.
*
* @param position The position which is used to measure distance.
* @param model The {@link RoadModel} which contains the objects.
* @param radius Objects with a distance smaller than <code>radius</code> to <code>position</code>
* are included.
* @param type The {@link Class} of the required type.
* @param <T> The type of the objects in the returned collection.
* @return A collection of type <code>type</code>.
*/
public static <T extends RoadUser> Collection<T> findObjectsWithinRadius(
final Point position, final RoadModel model, final double radius, final Class<T> type) {
return RoadModels.findObjectsWithinRadius(
position, model, radius, model.getObjectsOfType(type));
}
/**
* Returns all {@link RoadUser}s in <code>model</code> that are <strong>within</strong> a
* bird-flight distance of <code>radius</code> to <code>position</code>.
*
* @param position The position which is used to measure distance.
* @param model The {@link RoadModel} which contains the objects.
* @param radius Objects with a distance smaller than <code>radius</code> to <code>position</code>
* are included.
* @return A collection of {@link RoadUser}s.
*/
public static Collection<RoadUser> findObjectsWithinRadius(
final Point position, final RoadModel model, final double radius) {
return RoadModels.findObjectsWithinRadius(position, model, radius, model.getObjects());
}
/**
* Searches the closest <code>n</code> objects to position <code>pos</code> in {@link RoadModel}
* <code>rm</code>.
*
* @param pos The {@link Point} which is used as a reference point.
* @param rm The {@link RoadModel} instance in which the closest objects are searched.
* @param type The type of objects which are included in the search.
* @param n The maximum number of objects to return where n must be ≥ 0.
* @param <T> The type of the objects in the returned collection.
* @return A list of objects that are closest to <code>pos</code>. The list is ordered such that
* the closest object appears first. An empty list is returned when <code>objects</code> is
* empty.
*/
public static <T extends RoadUser> List<T> findClosestObjects(
Point pos, RoadModel rm, Class<T> type, int n) {
return RoadModels.findClosestObjects(pos, rm, rm.getObjectsOfType(type), n);
}
/**
* Searches the closest <code>n</code> objects to position <code>pos</code> in {@link RoadModel}
* <code>rm</code>. Only the objects that satisfy <code>predicate</code> are included in the
* search.
*
* @param pos The {@link Point} which is used as a reference point.
* @param rm The {@link RoadModel} instance in which the closest objects are searched.
* @param predicate Only objects that satisfy this predicate will be returned.
* @param n The maximum number of objects to return where n must be ≥ 0.
* @return A list of objects that are closest to <code>pos</code>. The list is ordered such that
* the closest object appears first. An empty list is returned when <code>objects</code> is
* empty.
*/
public static List<RoadUser> findClosestObjects(
Point pos, RoadModel rm, Predicate<RoadUser> predicate, int n) {
final Collection<RoadUser> filtered = Collections2.filter(rm.getObjects(), predicate);
return RoadModels.findClosestObjects(pos, rm, filtered, n);
}
@Override
public boolean apply(@Nullable RoadUser input) {
return type.isInstance(input) && model.equalPosition(verifyNotNull(input), reference);
}