[AETHER-1295][AETHER-1294] First stab to the TOST APIs framework
and to the DROP policies.

Patch includes also some CLI commands. REST APIs will be implemented
in a separate review. Other review will follow to implement the logic
of the REDIRECT policies

Change-Id: I34aa3da700c5a16682196e4dd8db9c4757d609c4
diff --git a/impl/src/main/java/org/onosproject/segmentrouting/policy/impl/TrafficMatchRequest.java b/impl/src/main/java/org/onosproject/segmentrouting/policy/impl/TrafficMatchRequest.java
new file mode 100644
index 0000000..6e01e01
--- /dev/null
+++ b/impl/src/main/java/org/onosproject/segmentrouting/policy/impl/TrafficMatchRequest.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2021-present Open Networking Foundation
+ *
+ * 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.segmentrouting.policy.impl;
+
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.segmentrouting.policy.api.PolicyId;
+import org.onosproject.segmentrouting.policy.api.TrafficMatch;
+import org.onosproject.segmentrouting.policy.api.TrafficMatchId;
+import org.onosproject.segmentrouting.policy.api.TrafficMatchState;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Representation of a traffic match.
+ */
+public final class TrafficMatchRequest {
+    // Stores need to track the traffic match info and the state
+    private final TrafficMatch trafficMatch;
+    private TrafficMatchState trafficMatchState;
+
+    /**
+     * Builds a traffic match request in pending add.
+     *
+     * @param tMatch the traffic match
+     */
+    public TrafficMatchRequest(TrafficMatch tMatch) {
+        trafficMatch = tMatch;
+        trafficMatchState = TrafficMatchState.PENDING_ADD;
+    }
+
+    /**
+     * To update the traffic match state.
+     *
+     * @param trafficMatchState the new state
+     */
+    public void trafficMatchState(TrafficMatchState trafficMatchState) {
+        this.trafficMatchState = trafficMatchState;
+    }
+
+    /**
+     * Returns the traffic match state.
+     *
+     * @return the state of the traffic match
+     */
+    public TrafficMatchState trafficMatchState() {
+        return trafficMatchState;
+    }
+
+    /**
+     * Returns the traffic match id.
+     *
+     * @return the id of the traffic match
+     */
+    public TrafficMatchId trafficMatchId() {
+        return trafficMatch.trafficMatchId();
+    }
+
+    /**
+     * Returns the id of the policy associated with.
+     *
+     * @return the policy id
+     */
+    public PolicyId policyId() {
+        return trafficMatch.policyId();
+    }
+
+    /**
+     * Returns the traffic selector associated with.
+     *
+     * @return the traffic selector
+     */
+    public TrafficSelector trafficSelector() {
+        return trafficMatch.trafficSelector();
+    }
+
+    /**
+     * Returns the traffic match associated with.
+     *
+     * @return the traffic match
+     */
+    public TrafficMatch trafficMatch() {
+        return trafficMatch;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(trafficMatch);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof TrafficMatchRequest) {
+            final TrafficMatchRequest other = (TrafficMatchRequest) obj;
+            return Objects.equals(trafficMatch, other.trafficMatch);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("trafficMatch", trafficMatch)
+                .add("trafficMatchState", trafficMatchState)
+                .toString();
+    }
+}