Package akka.dispatch
Class Filter$
- java.lang.Object
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- akka.dispatch.Filter$
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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 preferFuture.map
, translating non-matching values to failure cases.
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Constructor Summary
Constructors Constructor Description Filter$()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description <T> scala.Function1<T,java.lang.Object>
filterOf(Function<T,java.lang.Boolean> f)
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