Add getOpt() method.

TomasMikula · Jun 17, 2014 · 5460fb9 · 5460fb9
1 parent 4db1e05
commit 5460fb9
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diff --git a/README.md b/README.md
@@ -143,6 +143,7 @@ interface MonadicObservableValue<T> extends ObservableValue<T> {
     void ifPresent(Consumer<? super T> f);
     T getOrThrow();
     T getOrElse(T other);
+    Optional<T> getOpt();
     MonadicBinding<T> orElse(T other);
     MonadicBinding<T> orElse(ObservableValue<T> other);
     MonadicBinding<T> filter(Predicate<? super T> p);

diff --git a/src/main/java/org/fxmisc/easybind/monadic/MonadicObservableValue.java b/src/main/java/org/fxmisc/easybind/monadic/MonadicObservableValue.java
@@ -1,6 +1,7 @@
 package org.fxmisc.easybind.monadic;
 
 import java.util.NoSuchElementException;
+import java.util.Optional;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Predicate;
@@ -78,6 +79,15 @@ default T getOrElse(T other) {
         }
     }
 
+    /**
+     * Returns an {@code Optional} describing the value currently held by this
+     * ObservableValue, or and empty {@code Optional} if this ObservableValue
+     * is empty.
+     */
+    default Optional<T> getOpt() {
+        return Optional.ofNullable(getValue());
+    }
+
     /**
      * Returns a new ObservableValue that holds the value held by this
      * ObservableValue, or {@code other} when this ObservableValue is empty.