[ONOS-7732] Automating switch workflow: api, app, and sample workflows
Change-Id: Iee87d4fe6cf61c1f8904d1d77df5f913a712b64a
diff --git a/apps/workflow/api/src/main/java/org/onosproject/workflow/api/DataModelTree.java b/apps/workflow/api/src/main/java/org/onosproject/workflow/api/DataModelTree.java
new file mode 100644
index 0000000..3236164
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+++ b/apps/workflow/api/src/main/java/org/onosproject/workflow/api/DataModelTree.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.workflow.api;
+
+/**
+ * Interface for data model tree.
+ */
+public interface DataModelTree {
+
+ /**
+ * Data model tree node type (map or array).
+ */
+ enum Nodetype {
+
+ /**
+ * Map type data model tree node.
+ */
+ MAP,
+
+ /**
+ * Array type data model tree node.
+ */
+ ARRAY
+ }
+
+ /**
+ * Returns subtree on the path.
+ * @param path data model tree path
+ * @return subtree on the path
+ */
+ DataModelTree subtree(String path);
+
+ /**
+ * Attaches subtree on the path.
+ * @param path data model tree path where subtree will be attached
+ * @param tree subtree to be attached
+ * @throws WorkflowException workflow exception
+ */
+ void attach(String path, DataModelTree tree) throws WorkflowException;
+
+ /**
+ * Allocates leaf node on the path.
+ * @param path data model tree path where new leaf node will be allocated
+ * @param leaftype leaf node type
+ * @return data model tree
+ * @throws WorkflowException workflow exception
+ */
+ DataModelTree alloc(String path, Nodetype leaftype) throws WorkflowException;
+}
+