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https://issues.apache.org/jira/browse/GEOMETRY-146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17513655#comment-17513655
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Gilles Sadowski edited comment on GEOMETRY-146 at 3/29/22, 10:42 AM:
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{quote}Thoughts?
{quote}
{code:java}
PointMap<P, V> {
// ...
public abstract class EntrySet<P, V> extends Collection<Map.Entry<P, V>> {};
public interface EntrySetSelector<P, V> extends Function<EntrySet<P, V>>,
P> {};
public EntrySetSelector<P, V> withinDistance(double dist) {
return new WithinDistance(dist);
}
private class WithinDistance<P, V> implements EntrySetSelector<P,V> {
private WithinDistance(double dist) {
// ...
}
}
public enum ByDistance implements EntrySetSelector<P,V> {
ASCENDING(/* ... */),
DESCENDING(/* ... */);
// ...
}
}
{code}
was (Author: erans):
{quote}Thoughts?
{quote}
{code:java}
PointMap<P, V> {
// ...
public interface EntrySetSelector<P, V> extends
Function<Collection<Map.Entry<P, V>>, P> {}
public class WithinDistance implements EntrySetSelector<P,V> {
public WithinDistance(double dist) {
// ...
}
}
public enum ByDistance implements EntrySetSelector<P,V> {
ASCENDING(/* ... */),
DESCENDING(/* ... */);
// ...
}
}
{code}
> PointSet/Map closest points
> ---------------------------
>
> Key: GEOMETRY-146
> URL: https://issues.apache.org/jira/browse/GEOMETRY-146
> Project: Commons Geometry
> Issue Type: New Feature
> Reporter: Matt Juntunen
> Priority: Major
> Fix For: 1.1
>
>
> Add methods to the new {{PointSet}} and {{PointMap}} interfaces to allow
> querying of points in order of distance from a query point.
> {code:java}
> PointSet<P> {
> // find the closest point to pt or null if empty
> P closest(P pt);
> // iterate through points in order, with points closest to pt coming first
> Iterable<P> closestFirst(P pt);
> // find the farthest point from pt or null if emtpy
> P farthest(P pt);
> // iterate through point in order, with points farthest from pt coming
> first
> Iterable<P> farthestFirst(P pt);
> }
> {code}
> {{PointMap}} should have similar methods providing access to the map keys and
> entries.
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