[ONOS-3480] Implement MPLS TC Criterion to Southbound

Change-Id: I6fab221785b07f1962d43a86dd0af664be40a537

@@ -453,6 +453,16 @@ public final class Criteria {
     }
 
     /**
+     * Creates a match on MPLS TC.
+     *
+     * @param mplsTc MPLS TC (3 bits)
+     * @return match criterion
+     */
+    public static Criterion matchMplsTc(byte mplsTc) {
+        return new MplsTcCriterion(mplsTc);
+    }
+
+    /**
      * Creates a match on Tunnel ID.
      *
      * @param tunnelId Tunnel ID (64 bits)

+/*
+ * 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.flow.criteria;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Implementation of MPLS TC criterion (3 bits).
+ */
+public final class MplsTcCriterion implements Criterion {
+    private static final byte MASK = 0x7;
+    private final byte mplsTc;
+
+    /**
+     * Constructor.
+     *
+     * @param mplsTc the MPLS TC to match (3 bits)
+     */
+    MplsTcCriterion(byte mplsTc) {
+        this.mplsTc = (byte) (mplsTc & MASK);
+    }
+
+    @Override
+    public Type type() {
+        return Type.MPLS_TC;
+    }
+
+    /**
+     * Gets the MPLS TC to match.
+     *
+     * @return the MPLS TC to match (3 bits)
+     */
+    public byte tc() {
+        return mplsTc;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(type().toString())
+                .add("tc", Long.toHexString(mplsTc)).toString();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type().ordinal(), mplsTc);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof MplsTcCriterion) {
+            MplsTcCriterion that = (MplsTcCriterion) obj;
+            return Objects.equals(mplsTc, that.mplsTc) &&
+                    Objects.equals(this.type(), that.type());
+        }
+        return false;
+    }
+}