commit 7dac8a4bd60ec04bcb15373abf0ffe3b0a14065d
author Sho SHIMIZU <sshimizu@us.fujitsu.com> Wed Jan 27 12:04:39 2016 -0800
committer Gerrit Code Review <gerrit@onlab.us> Wed Jan 27 21:35:06 2016 +0000
tree e1709901401064a72bd610e98e5d25b81df9bf5c
parent 42ac51f3408591684b7027d943e0aad4bb514f16

Change the return type of ResourceId#parent()

Change-Id: Ice8c46f4dca02cfc24f85a6758a8536872b4c262

core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java

diff --git a/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java b/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java
index 7638f64..6f785df 100644
--- a/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java
+++ b/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java
@@ -21,6 +21,7 @@
 import org.onosproject.net.PortNumber;
 
 import java.util.Arrays;
+import java.util.Optional;
 
 import static com.google.common.base.Preconditions.checkArgument;
 
@@ -66,7 +67,13 @@
                 .add(Arrays.copyOfRange(components, 0, components.length - 1)), (Class<?>) last);
     }
 
-    abstract DiscreteResourceId parent();
+    /**
+     * Returns the parent resource ID of this instance.
+     *
+     * @return the parent resource path of this instance.
+     * If there is no parent, empty instance will be returned.
+     */
+    public abstract Optional<DiscreteResourceId> parent();
 
     /**
      * Returns a resource ID of a child of this resource based on the specified object.