Method fromNullable

output/java_guava/1.4.19/Optional.java:121–125

If nullableReference is non-null, returns an Optional instance containing that reference; otherwise returns Optional#absent. Comparison to java.util.Optional: this method is equivalent to Java 8's Optional.ofNullable.

(@Nullable T nullableReference)

  public static <T> Optional<T> fromNullable(@Nullable T nullableReference) {
    return (nullableReference == null)
      ? Optional.<T>absent()
      : new Present<T>(nullableReference);
  }

  Optional() {}