akka.dispatch
Class Filter
java.lang.Object
akka.dispatch.Filter
public class Filter
- extends java.lang.Object
Java API (not recommended):
Callback for the Future.filter operation that creates a new Future which will
conditionally contain the success of another Future.
Unfortunately it is not possible to express the type of a Scala filter in
Java: Function1[T, Boolean], where “Boolean” is the primitive type. It is
possible to use Future.filter
by constructing such a function indirectly:
import static akka.dispatch.Filter.filterOf;
Future<String> f = ...;
f.filter(filterOf(new Function<String, Boolean>() {
@Override
public Boolean apply(String s) {
...
}
}));
However, Future.filter
exists mainly to support Scala’s for-comprehensions,
thus Java users should prefer Future.map
, translating non-matching values
to failure cases.
Method Summary |
static
<T> scala.Function1<T,java.lang.Object> |
|
filterOf(Function<T,java.lang.Boolean> f)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Filter
public Filter()
filterOf
public static <T> scala.Function1<T,java.lang.Object> filterOf(Function<T,java.lang.Boolean> f)