Updated. Build a OVSDB driver and its associated behaviors for
supporting application to create VxLAN/GRE tunnels
This code is for JIRA ONOS-2181.

Change-Id: If7f341a422620a9e885741d4cc412fad39438d89
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/TunnelName.java b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelName.java
new file mode 100644
index 0000000..9be2654
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelName.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2015 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 com.google.common.annotations.Beta;
+
+import java.util.Objects;
+
+/**
+ * Represents for a unique tunnel name. TunnelId is generated by ONOS while
+ * TunnelName is given by producer. The consumer can borrow tunnels with
+ * TunnelId or TunnelName.
+ */
+@Beta
+public final class TunnelName {
+    private final String str;
+
+    // Default constructor for serialization
+    private TunnelName(String tunnelName) {
+        this.str = tunnelName;
+    }
+
+
+    /**
+     * Creates a tunnel name using the supplied URI string.
+     *
+     * @param tunnelName tunnel name string
+     * @return tunnel name object
+     */
+    public static TunnelName tunnelName(String tunnelName) {
+        return new TunnelName(tunnelName);
+    }
+
+    /**
+     * The string of tunnel name.
+     *
+     * @return the string of tunnel name
+     */
+    public String value() {
+        return str;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(str);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof TunnelName) {
+            final TunnelName that = (TunnelName) obj;
+            return this.getClass() == that.getClass()
+                    && Objects.equals(this.str, that.str);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return str;
+    }
+}