[CORD-545] Adds MPLS L2 Port support in ONOS core

Change-Id: I61d9b2c14580b4995fdcc96571745bfd00ee586f
diff --git a/drivers/default/src/main/java/org/onosproject/driver/extensions/Ofdpa3MatchMplsL2Port.java b/drivers/default/src/main/java/org/onosproject/driver/extensions/Ofdpa3MatchMplsL2Port.java
new file mode 100644
index 0000000..6213120
--- /dev/null
+++ b/drivers/default/src/main/java/org/onosproject/driver/extensions/Ofdpa3MatchMplsL2Port.java
@@ -0,0 +1,105 @@
+/*
+ * 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.driver.extensions;
+
+import com.google.common.base.MoreObjects;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.criteria.ExtensionSelector;
+import org.onosproject.net.flow.criteria.ExtensionSelectorType;
+
+import java.util.Objects;
+
+/**
+ * OFDPA MPLS L2 Port extension match. MPLS L2 Port
+ * is a logical port and it is represented with an
+ * integer.
+ */
+public class Ofdpa3MatchMplsL2Port extends AbstractExtension implements ExtensionSelector {
+    /**
+     * Integer representing the logical port.
+     */
+    private int mplsL2Port;
+
+    private static final KryoNamespace APPKRYO = new KryoNamespace.Builder()
+            .build();
+
+    /**
+     * OFDPA MPLS L2 Port extension match.
+     */
+    protected Ofdpa3MatchMplsL2Port() {
+        mplsL2Port = 0;
+    }
+
+    /**
+     * Constructs a new MPLS L2 Port match with a given Integer.
+     *
+     * @param mplsl2port the MPLS L2 Port
+     */
+    public Ofdpa3MatchMplsL2Port(int mplsl2port) {
+        this.mplsL2Port = mplsl2port;
+    }
+
+    /**
+     * Gets the MPLS L2 Port.
+     *
+     * @return MPLS L2 Port
+     */
+    public int mplsL2Port() {
+        return mplsL2Port;
+    }
+
+    @Override
+    public ExtensionSelectorType type() {
+        return ExtensionSelectorType.ExtensionSelectorTypes.OFDPA_MATCH_MPLS_L2_PORT.type();
+    }
+
+    @Override
+    public byte[] serialize() {
+        return APPKRYO.serialize(mplsL2Port);
+    }
+
+    @Override
+    public void deserialize(byte[] data) {
+        mplsL2Port = APPKRYO.deserialize(data);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mplsL2Port);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof Ofdpa3MatchMplsL2Port) {
+            Ofdpa3MatchMplsL2Port that = (Ofdpa3MatchMplsL2Port) obj;
+            return Objects.equals(mplsL2Port, that.mplsL2Port);
+
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("mplsL2Port", mplsL2Port)
+                .toString();
+    }
+}