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.

Constructor Summary

Filter()

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

Constructor Detail

Filter

public Filter()

Method Detail

filterOf

public static <T> scala.Function1<T,java.lang.Object> filterOf(Function<T,java.lang.Boolean> f)