also use getStaticSafeValue() for enums

observable/src/main/java/io/github/mmm/value/observable/enumeration/ReadableEnumValue.java

@@ -1,46 +1,50 @@
-/* Copyright (c) The m-m-m Team, Licensed under the Apache License, Version 2.0
- * http://www.apache.org/licenses/LICENSE-2.0 */
-package io.github.mmm.value.observable.enumeration;
-
-import java.util.Objects;
-
-import io.github.mmm.value.ReadableTypedValue;
-import io.github.mmm.value.observable.object.ReadableSimpleValue;
-
-/**
- * {@link ReadableTypedValue} with {@link Enum} {@link #get() value}.
- *
- * @param <E> type of {@link Enum} {@link #getValue() value}.
- * @since 1.0.0
- */
-public interface ReadableEnumValue<E extends Enum<E>> extends ReadableSimpleValue<E> {
-
-  @Override
-  default String getAsString() {
-
-    E e = get();
-    if (e == null) {
-      return null;
-    }
-    return e.toString();
-  }
-
-  /**
-   * Same as {@link #get()}.
-   *
-   * @return the current {@link #get() value}.
-   */
-  default E getValue() {
-
-    return get();
-  }
-
-  @Override
-  default E getSafe() {
-
-    E e = get();
-    Objects.requireNonNull(e);
-    return e;
-  }
-
-}
+/* Copyright (c) The m-m-m Team, Licensed under the Apache License, Version 2.0
+ * http://www.apache.org/licenses/LICENSE-2.0 */
+package io.github.mmm.value.observable.enumeration;
+
+import io.github.mmm.value.ReadableTypedValue;
+import io.github.mmm.value.observable.object.ReadableSimpleValue;
+
+/**
+ * {@link ReadableTypedValue} with {@link Enum} {@link #get() value}.
+ *
+ * @param <E> type of {@link Enum} {@link #getValue() value}.
+ * @since 1.0.0
+ */
+public interface ReadableEnumValue<E extends Enum<E>> extends ReadableSimpleValue<E> {
+
+  @Override
+  default String getAsString() {
+
+    E e = get();
+    if (e == null) {
+      return null;
+    }
+    return e.toString();
+  }
+
+  /**
+   * Same as {@link #get()}.
+   *
+   * @return the current {@link #get() value}.
+   */
+  default E getValue() {
+
+    return get();
+  }
+
+  @Override
+  default E getStaticSafeValue() {
+
+    Class<E> valueClass = getValueClass();
+    if (valueClass == null) {
+      return null;
+    }
+    E[] constants = valueClass.getEnumConstants();
+    if (constants.length == 0) {
+      return null;
+    }
+    return constants[0];
+  }
+
+}