Added patch interface add and remove behavior, and implemented OVSDB driver
Change-Id: Ic7632906fcfe50ec224fabdc15cb902a70150fae
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/PatchDescription.java b/core/api/src/main/java/org/onosproject/net/behaviour/PatchDescription.java
new file mode 100755
index 0000000..16958fb
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/PatchDescription.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.net.behaviour;
+
+import org.onosproject.net.Annotated;
+import org.onosproject.net.Description;
+
+import java.util.Optional;
+
+/**
+ * Describes a patch interface.
+ */
+public interface PatchDescription extends Description, Annotated {
+
+ /**
+ * Returns the identifier of the device where this patch interface is.
+ *
+ * @return device identifier; empty value if not set
+ */
+ Optional<String> deviceId();
+
+ /**
+ * Return the name of the patch interface.
+ *
+ * @return patch interface name
+ */
+ String ifaceName();
+
+ /**
+ * Returns the name of the interface for the other side of the patch.
+ *
+ * @return peer patch interface name
+ */
+ String peer();
+
+ /**
+ * Builder of patch interface description entities.
+ */
+ interface Builder {
+
+ /**
+ * Returns new patch interface description.
+ *
+ * @return patch interface description
+ */
+ PatchDescription build();
+
+ /**
+ * Returns new patch interface description.
+ *
+ * @param deviceId device id
+ * @return patch interface description builder
+ */
+ Builder deviceId(String deviceId);
+ /**
+ * Returns patch interface description builder with a given interface name.
+ *
+ * @param ifaceName interface name
+ * @return patch interface description builder
+ */
+ Builder ifaceName(String ifaceName);
+
+ /**
+ * Returns patch interface description builder with a given peer.
+ *
+ * @param peerName peer patch interface name
+ * @return patch interface description builder
+ */
+ Builder peer(String peerName);
+ }
+
+}