Use diamond operator

Change-Id: I9bb7e90ce7f45e65b4081a5bf85570b97e44712e
diff --git a/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceDescriptions.java b/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceDescriptions.java
index fd7fcd8..2320672 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceDescriptions.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceDescriptions.java
@@ -82,7 +82,7 @@
         if (oldOne != null) {
             SparseAnnotations merged = union(oldOne.value().annotations(),
                                              newDesc.value().annotations());
-            newOne = new Timestamped<DeviceDescription>(
+            newOne = new Timestamped<>(
                     new DefaultDeviceDescription(newDesc.value(), merged),
                     newDesc.timestamp());
         }
@@ -104,27 +104,27 @@
             switch (newDesc.value().type()) {
                 case OMS:
                     OmsPortDescription omsDesc = (OmsPortDescription) (newDesc.value());
-                    newOne = new Timestamped<PortDescription>(
+                    newOne = new Timestamped<>(
                             new OmsPortDescription(
                                     omsDesc, omsDesc.minFrequency(), omsDesc.maxFrequency(), omsDesc.grid(), merged),
                             newDesc.timestamp());
                     break;
                 case OCH:
                     OchPortDescription ochDesc = (OchPortDescription) (newDesc.value());
-                    newOne = new Timestamped<PortDescription>(
+                    newOne = new Timestamped<>(
                             new OchPortDescription(
                                     ochDesc, ochDesc.signalType(), ochDesc.isTunable(), ochDesc.lambda(), merged),
                             newDesc.timestamp());
                     break;
                 case ODUCLT:
                     OduCltPortDescription ocDesc = (OduCltPortDescription) (newDesc.value());
-                    newOne = new Timestamped<PortDescription>(
+                    newOne = new Timestamped<>(
                             new OduCltPortDescription(
                                     ocDesc, ocDesc.signalType(), merged),
                             newDesc.timestamp());
                     break;
                 default:
-                    newOne = new Timestamped<PortDescription>(
+                    newOne = new Timestamped<>(
                             new DefaultPortDescription(newDesc.value(), merged),
                             newDesc.timestamp());
             }
diff --git a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
index cf48dcb..97333eb 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
@@ -131,8 +131,7 @@
     private ExecutorService messageHandlingExecutor;
     private static final int MESSAGE_HANDLER_THREAD_POOL_SIZE = 1;
 
-    private final HashMap<DeviceId, Boolean> deviceAuditStatus =
-            new HashMap<DeviceId, Boolean>();
+    private final HashMap<DeviceId, Boolean> deviceAuditStatus = new HashMap<>();
 
     private final AtomicInteger groupIdGen = new AtomicInteger();
 
@@ -685,8 +684,7 @@
                                                    UpdateType type,
                                                    GroupBuckets buckets) {
         GroupBuckets oldBuckets = oldGroup.buckets();
-        List<GroupBucket> newBucketList = new ArrayList<GroupBucket>(
-                oldBuckets.buckets());
+        List<GroupBucket> newBucketList = new ArrayList<>(oldBuckets.buckets());
         boolean groupDescUpdated = false;
 
         if (type == UpdateType.ADD) {
diff --git a/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java b/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java
index 767ede5..105c77d 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/link/impl/GossipLinkStore.java
@@ -62,7 +62,6 @@
 import org.slf4j.Logger;
 
 import java.io.IOException;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -551,7 +550,7 @@
      */
     private static <K, V> SetMultimap<K, V> createSynchronizedHashMultiMap() {
         return synchronizedSetMultimap(
-               Multimaps.newSetMultimap(new ConcurrentHashMap<K, Collection<V>>(),
+               Multimaps.newSetMultimap(new ConcurrentHashMap<>(),
                                        () -> Sets.newConcurrentHashSet()));
     }
 
diff --git a/core/store/dist/src/main/java/org/onosproject/store/mastership/impl/RoleValue.java b/core/store/dist/src/main/java/org/onosproject/store/mastership/impl/RoleValue.java
index 9d3b168..5a38a34 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/mastership/impl/RoleValue.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/mastership/impl/RoleValue.java
@@ -45,9 +45,9 @@
      * Constructs empty RoleValue.
      */
     public RoleValue() {
-        value.put(MastershipRole.MASTER, new LinkedList<NodeId>());
-        value.put(MastershipRole.STANDBY, new LinkedList<NodeId>());
-        value.put(MastershipRole.NONE, new LinkedList<NodeId>());
+        value.put(MastershipRole.MASTER, new LinkedList<>());
+        value.put(MastershipRole.STANDBY, new LinkedList<>());
+        value.put(MastershipRole.NONE, new LinkedList<>());
     }
 
     /**
diff --git a/core/store/dist/src/test/java/org/onosproject/store/consistent/impl/UpdateResultTest.java b/core/store/dist/src/test/java/org/onosproject/store/consistent/impl/UpdateResultTest.java
index 84dc915..dd4c63b 100644
--- a/core/store/dist/src/test/java/org/onosproject/store/consistent/impl/UpdateResultTest.java
+++ b/core/store/dist/src/test/java/org/onosproject/store/consistent/impl/UpdateResultTest.java
@@ -15,8 +15,8 @@
 
     @Test
     public void testGetters() {
-        Versioned<String> oldValue = new Versioned<String>("a", 1);
-        Versioned<String> newValue = new Versioned<String>("b", 2);
+        Versioned<String> oldValue = new Versioned<>("a", 1);
+        Versioned<String> newValue = new Versioned<>("b", 2);
         UpdateResult<String, String> ur =
                 new UpdateResult<>(true, "foo", "k", oldValue, newValue);
 
@@ -29,8 +29,8 @@
 
     @Test
     public void testToMapEvent() {
-        Versioned<String> oldValue = new Versioned<String>("a", 1);
-        Versioned<String> newValue = new Versioned<String>("b", 2);
+        Versioned<String> oldValue = new Versioned<>("a", 1);
+        Versioned<String> newValue = new Versioned<>("b", 2);
         UpdateResult<String, String> ur1 =
                 new UpdateResult<>(true, "foo", "k", oldValue, newValue);
         MapEvent<String, String> event1 = ur1.toMapEvent();
@@ -59,8 +59,8 @@
 
     @Test
     public void testMap() {
-        Versioned<String> oldValue = new Versioned<String>("a", 1);
-        Versioned<String> newValue = new Versioned<String>("b", 2);
+        Versioned<String> oldValue = new Versioned<>("a", 1);
+        Versioned<String> newValue = new Versioned<>("b", 2);
         UpdateResult<String, String> ur1 =
                 new UpdateResult<>(true, "foo", "k", oldValue, newValue);
         UpdateResult<Integer, Integer> ur2 = ur1.map(s -> s.length(), s -> s.length());
diff --git a/core/store/dist/src/test/java/org/onosproject/store/flow/impl/ReplicaInfoManagerTest.java b/core/store/dist/src/test/java/org/onosproject/store/flow/impl/ReplicaInfoManagerTest.java
index d429752..76ff804 100644
--- a/core/store/dist/src/test/java/org/onosproject/store/flow/impl/ReplicaInfoManagerTest.java
+++ b/core/store/dist/src/test/java/org/onosproject/store/flow/impl/ReplicaInfoManagerTest.java
@@ -101,7 +101,7 @@
 
         // fake MastershipEvent
         eventDispatcher.post(new MastershipEvent(Type.MASTER_CHANGED, DID1,
-                new RoleInfo(NID1, new LinkedList<NodeId>())));
+                new RoleInfo(NID1, new LinkedList<>())));
 
         assertTrue(latch.await(1, TimeUnit.SECONDS));
     }