Skeletons for Intent-runtime, Flow-manager and Match-action modules.

This task is a part of ONOS-1395.
(Sub-tasks: ONOS-1397, ONOS-1398, ONOS-1400)

Change-Id: I30064f658b6c193aee8419079dad380163364475
diff --git a/src/main/java/net/onrc/onos/api/batchoperation/BatchOperation.java b/src/main/java/net/onrc/onos/api/batchoperation/BatchOperation.java
new file mode 100644
index 0000000..b51c8eb
--- /dev/null
+++ b/src/main/java/net/onrc/onos/api/batchoperation/BatchOperation.java
@@ -0,0 +1,69 @@
+package net.onrc.onos.api.batchoperation;
+
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * A list of BatchOperationEntry.
+ *
+ * @param <T> IBatchOperationTarget. This should be Intent, IFlow, or
+ *        MatchAction.
+ */
+public class BatchOperation<T extends IBatchOperationTarget> {
+    private List<BatchOperationEntry> ops;
+
+    /**
+     * Constructor.
+     */
+    public BatchOperation() {
+        ops = new LinkedList<BatchOperationEntry>();
+    }
+
+    /**
+     * Removes all operations maintained in this object.
+     */
+    public void clear() {
+        ops.clear();
+    }
+
+    /**
+     * Returns an iterator over the operations in this object.
+     *
+     * @return an iterator over the operations in this object.
+     */
+    public Iterator<BatchOperationEntry> iterator() {
+        return ops.iterator();
+    }
+
+    /**
+     * Adds an add-operation.
+     *
+     * @param intent Intent to be added.
+     * @return true if succeeded, false otherwise.
+     */
+    public boolean addAddOperation(T target) {
+        return ops.add(new AddOperation(target));
+    }
+
+    /**
+     * Adds a remove-operation.
+     *
+     * @param id ID of the target to be removed.
+     * @return true if succeeded, false otherwise.
+     */
+    public boolean addRemoveOperation(String id) {
+        return ops.add(new RemoveOperation(id));
+    }
+
+    /**
+     * Adds a update-operation.
+     *
+     * @param oldtargetId ID of the existing target to be overwritten.
+     * @param newTarget The new target to be added.
+     * @return true if succeeded, false otherwise.
+     */
+    public boolean addUpdateOperation(String oldTargetId, T newTarget) {
+        return ops.add(new UpdateOperation(oldTargetId, newTarget));
+    }
+}