BUG-5280: move DataTreeCandidate serialization to its own class

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / persisted / DeletedDataTreeCandidateNode.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/DeletedDataTreeCandidateNode.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/DeletedDataTreeCandidateNode.java
new file mode 100644 (file)
index 0000000..1439779
--- /dev/null
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/persisted/DeletedDataTreeCandidateNode.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.cluster.datastore.persisted;
+
+import com.google.common.base.Optional;
+import java.util.Collection;
+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.DataTreeCandidateNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
+
+/**
+ * A deserialized {@link DataTreeCandidateNode} which represents a deletion.
+ */
+abstract class DeletedDataTreeCandidateNode extends AbstractDataTreeCandidateNode {
+    private DeletedDataTreeCandidateNode() {
+        super(ModificationType.DELETE);
+    }
+
+    static DataTreeCandidateNode create() {
+        return new DeletedDataTreeCandidateNode() {
+            @Override
+            public PathArgument getIdentifier() {
+                throw new UnsupportedOperationException("Root node does not have an identifier");
+            }
+        };
+    }
+
+    static DataTreeCandidateNode create(final PathArgument identifier) {
+        return new DeletedDataTreeCandidateNode() {
+            @Override
+            public final PathArgument getIdentifier() {
+                return identifier;
+            }
+        };
+    }
+
+    @Override
+    public final Optional<NormalizedNode<?, ?>> getDataAfter() {
+        return Optional.absent();
+    }
+
+    @Override
+    public final Collection<DataTreeCandidateNode> getChildNodes() {
+        // We would require the before-image to reconstruct the list of nodes which
+        // were deleted.
+        throw new UnsupportedOperationException("Children not available after serialization");
+    }
+}