Add a default getOptionalValue() to HasValue (#8324)

Fixes #8323

1 files changed, 13 insertions, 0 deletions

diff --git a/server/src/main/java/com/vaadin/data/HasValue.java b/server/src/main/java/com/vaadin/data/HasValue.java
index 962a3e9620..de2f86550f 100644
--- a/server/src/main/java/com/vaadin/data/HasValue.java
+++ b/server/src/main/java/com/vaadin/data/HasValue.java
@@ -19,6 +19,7 @@ import java.io.Serializable;
 import java.lang.reflect.Method;
 import java.util.EventObject;
 import java.util.Objects;
+import java.util.Optional;
 
 import com.vaadin.event.SerializableEventListener;
 import com.vaadin.server.Setter;
@@ -220,6 +221,18 @@ public interface HasValue<V> extends Serializable {
     }
 
     /**
+     * Returns the current value of this object, wrapped in an {@code Optional}.
+     * <p>
+     * The {@code Optional} will be empty if the value is {@code null} or
+     * {@code isEmpty()} returns {@code true}. 
+     *
+     * @return the current value, wrapped in an {@code Optional}
+     */
+    public default Optional<V> getOptionalValue() {
+        return isEmpty() ? Optional.empty() : Optional.ofNullable(getValue());
+    }
+
+    /**
      * Returns whether this {@code HasValue} is considered to be empty.
      * <p>
      * By default this is an equality check between current value and empty