/**
* Invariant functor map over this enumerator.
*
* @param f The covariant map.
* @param g The contra-variant map.
* @return An enumerator after the given functions are applied.
*/
public <B> Enumerator<B> xmap(final F<A, B> f, final F<B, A> g) {
final F<Option<A>, Option<B>> of = o -> o.map(f);
return enumerator(
compose(compose(of, successor), g),
compose(compose(of, predecessor), g),
max.map(f),
min.map(f),
order.contramap(g),
compose(compose(Function.<Long, Option<A>, Option<B>>compose().f(of), plus), g));
}
@Path("/events/{eventName}/icons/labels/{label}.png")
@GET
@Produces("image/png")
public Response getLabelIcon(
@PathParam("eventName") final String eventName, @PathParam("label") final String label) {
OperationResult<Event> eventResult = incogito.getEventByName(eventName);
if (!eventResult.isOk()) {
return toJsr311(eventResult);
}
Option<File> fileOption = eventResult.value().labelMap.get(label).map(Label.iconFile_);
if (!fileOption.isSome()) {
return toJsr311(OperationResult.<Object>notFound("No icon for label '" + label + "'."));
}
// TODO: How about some caching here?
Option<byte[]> bytes =
join(
fileOption
.map(IO.<byte[]>runFileInputStream_().f(IO.ByteArrays.streamToByteArray))
.map(compose(P1.<Option<byte[]>>__1(), Callables.<byte[]>option())));
return toJsr311(fromOption(bytes, "Unable to read label file."), cacheForOneHourCacheControl);
}
public String toString() {
return "user="******"<not set>")
+ ", "
+ "group="
+ group.orSome("<not set>")
+ ", "
+ "mode="
+ mode.map(showLong).orSome("<not set>");
}