[ONOS-5076] YANG data tree Builder
Change-Id: I25160b651c26e614d29d7fad85e63f77a262d77c
diff --git a/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/AppData.java b/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/AppData.java
new file mode 100644
index 0000000..8fee570
--- /dev/null
+++ b/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/AppData.java
@@ -0,0 +1,85 @@
+/*
+ * 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.yms.app.ydt;
+
+import org.onosproject.yangutils.datamodel.YangSchemaNode;
+import org.onosproject.yms.ydt.YdtContext;
+
+import java.util.List;
+
+/**
+ * Maintains application data, which will be used by Application broker to
+ * interact with applications.
+ */
+public interface AppData {
+
+ /**
+ * Returns the list of nodes with operation type delete.
+ *
+ * @return list of nodes with operation type delete
+ */
+ List<YdtContext> getDeleteNodes();
+
+ /**
+ * Adds the ydt node with operation type delete in module delete node list.
+ *
+ * @param node ydt node with operation type delete/remove
+ */
+ void addDeleteNodes(YdtContext node);
+
+ /**
+ * Returns application's root ydtContext.
+ *
+ * @return YdtContext of application root node
+ */
+ YdtContext getModuleContext();
+
+ /**
+ * Sets the application's ydtContext.
+ *
+ * @param moduleNode application's ydtContext
+ */
+ void setModuleContext(YdtContext moduleNode);
+
+ /**
+ * Returns the YangSchemaNode of augmenting application.
+ *
+ * @return YangSchemaNode of augmenting application
+ */
+ YangSchemaNode getAugmentingSchemaNode();
+
+ /**
+ * Sets the YangSchemaNode of augmenting application root node.
+ *
+ * @param schemaNode YangSchemaNode of augmenting application module
+ */
+ void setAugmentingSchemaNode(YangSchemaNode schemaNode);
+
+ /**
+ * Returns the schema node current context.
+ *
+ * @return schema node
+ */
+ YangSchemaNode getSchemaNode();
+
+ /**
+ * Returns the root/module schema node current application.
+ *
+ * @return schema node
+ */
+ YangSchemaNode getRootSchemaNode();
+}