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 / TreeNodeFactory.java

diff --git a/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/tree/spi/TreeNodeFactory.java b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/tree/spi/TreeNodeFactory.java
new file mode 100644 (file)
index 0000000..03c3ab8
--- /dev/null
+++ b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/tree/spi/TreeNodeFactory.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.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
+import org.opendaylight.yangtools.yang.data.api.schema.OrderedNodeContainer;
+
+import com.google.common.primitives.UnsignedLong;
+
+public final class TreeNodeFactory {
+    private TreeNodeFactory() {
+        throw new UnsupportedOperationException("Utility class should not be instantiated");
+    }
+
+    /**
+     * Create a new AbstractTreeNode from a data node, descending recursively as needed.
+     * This method should only ever be used for new data.
+     *
+     * @param data data node
+     * @param version data node version
+     * @return new AbstractTreeNode instance, covering the data tree provided
+     */
+    public static final TreeNode createTreeNode(final NormalizedNode<?, ?> data, final UnsignedLong version) {
+        if (data instanceof NormalizedNodeContainer<?, ?, ?>) {
+            @SuppressWarnings("unchecked")
+            NormalizedNodeContainer<?, ?, NormalizedNode<?, ?>> container = (NormalizedNodeContainer<?, ?, NormalizedNode<?, ?>>) data;
+            return ContainerNode.create(version, container);
+
+        }
+        if (data instanceof OrderedNodeContainer<?>) {
+            @SuppressWarnings("unchecked")
+            OrderedNodeContainer<NormalizedNode<?, ?>> container = (OrderedNodeContainer<NormalizedNode<?, ?>>) data;
+            return ContainerNode.create(version, container);
+        }
+
+        return new ValueNode(data, version);
+    }
+}