Method immediateFuture

output/java_guava/1.4.17/Futures.java:141–149

Creates a ListenableFuture which has its value set immediately upon construction. The getters just return the value. This Future can't be canceled or timed out and its isDone() method always returns true.

(@Nullable V value)

  public static <V> ListenableFuture<V> immediateFuture(@Nullable V value) {
    if (value == null) {
      // This cast is safe because null is assignable to V for all V (i.e. it is covariant)
      @SuppressWarnings({"unchecked", "rawtypes"})
      ListenableFuture<V> typedNull = (ListenableFuture) ImmediateSuccessfulFuture.NULL;
      return typedNull;
    }
    return new ImmediateSuccessfulFuture<V>(value);
  }

  /**
   * Returns a {@code CheckedFuture} which has its value set immediately upon construction.