ONOS-5718 Dynamic Config APIs with RPC and Notification support
Change-Id: I670890efee83c86c7a3b242783c0a62879059849
diff --git a/apps/config/src/main/java/org/onosproject/config/model/DataNode.java b/apps/config/src/main/java/org/onosproject/config/model/DataNode.java
new file mode 100755
index 0000000..5c43304
--- /dev/null
+++ b/apps/config/src/main/java/org/onosproject/config/model/DataNode.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.config.model;
+
+import java.util.LinkedHashMap;
+
+/**
+ * Hollow definition of DataNode for ConfigService APIs.
+ */
+public interface DataNode {
+ //will remove this when the corresponding changes in onos-yang-tools become available
+
+ /**
+ * Builder for DataNode.
+ */
+ interface Builder<V> {
+ /**
+ * clones a base Data node obj to a new one.
+ *
+ * @param base base DataNode obj to be cloned
+ * @return a DataNode builder
+ */
+ Builder addBaseObj(DataNode base);
+ /**
+ * Adds the value of the instance node.
+ *
+ * @param key of the node
+ * @return a DataNode builder
+ */
+ Builder addKey(NodeKey key);
+ /**
+ * Adds the value of the instance node.
+ *
+ * @param type of the node
+ * @return a DataNode builder
+ */
+ Builder addType(DataNode.Type type);
+ /**
+ * Adds the value of the leaf node.
+ *
+ * @param value at the node
+ * @return a DataNode builder
+ */
+ Builder addValue(String value);
+
+ /**
+ * Adds children to the children field.
+ *
+ * @param children to be added
+ * @return a DataNode builder
+ */
+ //Builder addChildren(LinkedHashMap<NodeKey, DataNode> children);
+
+ /**
+ * Builds an immutable DataNode entity.
+ *
+ * @return DataNode
+ */
+ DataNode build();
+ }
+
+ /**
+ * Returns the children if DataNode contains an inner node.
+ *
+ * @return LinkedHashMap of children for an inner node, null for a leaf node
+ */
+ LinkedHashMap<NodeKey, DataNode> children();
+
+ /**
+ * Returns the value at the leaf node as a string.
+ *
+ * @return value at the leaf node as a string, null if it is an innernode
+ */
+ String value();
+
+ /**
+ * Returns the node schema identifier.
+ *
+ * @return node schema identifier
+ */
+ SchemaIdentifier identifier();
+
+ /**
+ * Returns the type of node.
+ *
+ * @return node type
+ */
+ Type type();
+
+ /**
+ * Returns the key to identify a branching node.
+ *
+ * @return key to identify a branching node
+ */
+ NodeKey key();
+
+ /**
+ * Represents type of node in data store.
+ */
+ enum Type {
+
+ /**
+ * Single instance node.
+ */
+ SINGLE_INSTANCE_NODE,
+
+ /**
+ * Multi instance node.
+ */
+ MULTI_INSTANCE_NODE,
+
+ /**
+ * Single instance leaf node.
+ */
+ SINGLE_INSTANCE_LEAF_VALUE_NODE,
+
+ /**
+ * Multi instance leaf node.
+ */
+ MULTI_INSTANCE_LEAF_VALUE_NODE
+ }
+}