Add CLI commands to create/list/remove tunnels and policies

Change-Id: I8cffb0feceb07e7f090e6a51fa41dde680b4956a
diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/cli/PolicyListCommand.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/cli/PolicyListCommand.java
new file mode 100644
index 0000000..7677e2e
--- /dev/null
+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/cli/PolicyListCommand.java
@@ -0,0 +1,50 @@
+/*
+ * 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.segmentrouting.cli;
+
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.segmentrouting.Policy;
+import org.onosproject.segmentrouting.SegmentRoutingService;
+import org.onosproject.segmentrouting.TunnelPolicy;
+
+/**
+ * Command to show the list of policies.
+ */
+@Command(scope = "onos", name = "srpolicy-list",
+        description = "Lists all policies")
+public class PolicyListCommand extends AbstractShellCommand {
+
+    private static final String FORMAT_MAPPING_TUNNEL =
+            "  id=%s, type=%s,  prio=%d, src=%s, dst=%s, proto=%s, tunnel=%s";
+
+    @Override
+    protected void execute() {
+
+        SegmentRoutingService srService =
+                AbstractShellCommand.get(SegmentRoutingService.class);
+
+        srService.getPolicies().forEach(policy -> printPolicy(policy));
+    }
+
+    private void printPolicy(Policy policy) {
+        if (policy.type() == Policy.Type.TUNNEL_FLOW) {
+            print(FORMAT_MAPPING_TUNNEL, policy.id(), policy.type(), policy.priority(),
+                    policy.srcIp(), policy.dstIp(), (policy.ipProto() == null) ? "" : policy.ipProto(),
+                    ((TunnelPolicy) policy).tunnelId());
+        }
+    }
+}
\ No newline at end of file