optional orelse optional ex

core-java-9/src/main/java/com/baeldung/optionals/Optionals.java

@@ -0,0 +1,26 @@
+package com.baeldung.optionals;
+
+import java.util.Optional;
+
+public class Optionals {
+
+    public static <T> Optional<T> or(Optional<T> optional, Optional<T> fallback) {
+        return optional.isPresent() ? optional : fallback;
+    }
+
+    public static Optional<String> getName(Optional<String> name) {
+        return name.or(() -> getCustomMessage());
+    }
+
+    public static com.google.common.base.Optional<String> getOptionalGuavaName(com.google.common.base.Optional<String> name) {
+        return name.or(getCustomMessageGuava());
+    }
+
+    private static Optional<String> getCustomMessage() {
+        return Optional.of("Name not provided");
+    }
+
+    private static com.google.common.base.Optional<String> getCustomMessageGuava() {
+        return com.google.common.base.Optional.of("Name not provided");
+    }
+}