BUG-509: create data tree SPI package

[controller.git] / opendaylight / md-sal / sal-dom-broker / src / main / java / org / opendaylight / controller / md / sal / dom / store / impl / tree / spi / ValueNode.java

diff --git a/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/tree/spi/ValueNode.java b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/tree/spi/ValueNode.java
new file mode 100644 (file)
index 0000000..cbd2a17
--- /dev/null
+++ b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/tree/spi/ValueNode.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2014 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.md.sal.dom.store.impl.tree.spi;
+
+import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Optional;
+import com.google.common.primitives.UnsignedLong;
+
+final class ValueNode extends AbstractTreeNode {
+    private static final Logger LOG = LoggerFactory.getLogger(ValueNode.class);
+
+    protected ValueNode(final NormalizedNode<?, ?> data, final UnsignedLong version) {
+        super(data, version);
+    }
+
+    @Override
+    public Optional<TreeNode> getChild(final PathArgument childId) {
+        LOG.warn("Attempted to access child {} of value-node {}", childId, this);
+        return Optional.absent();
+    }
+
+    @Override
+    public UnsignedLong getSubtreeVersion() {
+        return getVersion();
+    }
+
+    @Override
+    public MutableTreeNode mutable() {
+        /**
+         * Value nodes can only we read/written/delete, which does a straight
+         * replace. That means they don't haver need to be made mutable.
+         */
+        throw new UnsupportedOperationException(String.format("Attempted to mutate value-node %s", this));
+    }
+}