BUG-8733: use DataTreeCandidateNodes.empty()

Removes code duplication, making DistributedShardChangePublisher
a bit smaller.

Change-Id: I67ab71c4344c1a61ebda929d6fceb1ebb3fbb376
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardChangePublisher.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardChangePublisher.java
index 0eef92ad145cb1d3c8497dc972c695f7f3ee1645..95476475e78e975f87430b1f9619eccd82d33401 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardChangePublisher.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardChangePublisher.java
@@ -8,7 +8,6 @@
 
 package org.opendaylight.controller.cluster.sharding;
 
-import com.google.common.base.Optional;
 import com.google.common.base.Preconditions;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -20,7 +19,6 @@ import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Collectors;
 import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import javax.annotation.concurrent.GuardedBy;
 import org.opendaylight.controller.cluster.databroker.actors.dds.DataStoreClient;
 import org.opendaylight.controller.cluster.datastore.AbstractDataStore;
@@ -34,14 +32,13 @@ import org.opendaylight.mdsal.dom.spi.store.DOMStoreTreeChangePublisher;
 import org.opendaylight.yangtools.concepts.ListenerRegistration;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
-import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNodes;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
 import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
 import org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaValidationFailedException;
@@ -235,7 +232,7 @@ public class DistributedShardChangePublisher
         }
 
         if (modifiedChild == null) {
-            modifiedChild = new EmptyDataTreeCandidateNode(dataTree.getRootPath().getLastPathArgument());
+            modifiedChild = DataTreeCandidateNodes.empty(dataTree.getRootPath().getLastPathArgument());
         }
 
         return DataTreeCandidates.newDataTreeCandidate(dataTree.getRootPath(), modifiedChild);
@@ -330,49 +327,4 @@ public class DistributedShardChangePublisher
             registrations.clear();
         }
     }
-
-    private static final class EmptyDataTreeCandidateNode implements DataTreeCandidateNode {
-
-        private final PathArgument identifier;
-
-        EmptyDataTreeCandidateNode(final PathArgument identifier) {
-            this.identifier = Preconditions.checkNotNull(identifier, "Identifier should not be null");
-        }
-
-        @Nonnull
-        @Override
-        public PathArgument getIdentifier() {
-            return identifier;
-        }
-
-        @Nonnull
-        @Override
-        public Collection<DataTreeCandidateNode> getChildNodes() {
-            return Collections.emptySet();
-        }
-
-        @Nullable
-        @Override
-        public DataTreeCandidateNode getModifiedChild(final PathArgument identifier) {
-            return null;
-        }
-
-        @Nonnull
-        @Override
-        public ModificationType getModificationType() {
-            return ModificationType.UNMODIFIED;
-        }
-
-        @Nonnull
-        @Override
-        public Optional<NormalizedNode<?, ?>> getDataAfter() {
-            return Optional.absent();
-        }
-
-        @Nonnull
-        @Override
-        public Optional<NormalizedNode<?, ?>> getDataBefore() {
-            return Optional.absent();
-        }
-    }
 }

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardFrontend.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardFrontend.java
index 6eddb5fa185ca87a0303f8d6417699145afcea9a..fb55b3a299def2cacc5a259bda690290ac270a5e 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardFrontend.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/DistributedShardFrontend.java
@@ -137,7 +137,6 @@ class DistributedShardFrontend implements ReadableWriteableDOMDataTreeShard {
 
     @Nonnull
     @Override
-    @SuppressWarnings("unchecked")
     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(
             final YangInstanceIdentifier treeId, final L listener) {
         return publisher.registerTreeChangeListener(treeId, listener);