[ONOS-2827] add router interface service cli

Change-Id: I01a50e9d2c7ffd4f66b48e9f1ea7e14c75ae8eb4
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/cli/routerinterface/RouterInterfaceQueryCommand.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/cli/routerinterface/RouterInterfaceQueryCommand.java
new file mode 100644
index 0000000..5de35ae
--- /dev/null
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/cli/routerinterface/RouterInterfaceQueryCommand.java
@@ -0,0 +1,56 @@
+/*
+ * 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.vtnrsc.cli.routerinterface;
+
+import org.apache.karaf.shell.commands.Command;
+import org.apache.karaf.shell.commands.Option;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.vtnrsc.RouterInterface;
+import org.onosproject.vtnrsc.SubnetId;
+import org.onosproject.vtnrsc.routerinterface.RouterInterfaceService;
+
+/**
+ * Supports for query a router interface.
+ */
+@Command(scope = "onos", name = "routerinterfaces", description = "Supports for querying a router interface")
+public class RouterInterfaceQueryCommand extends AbstractShellCommand {
+    @Option(name = "-s", aliases = "--subnetId", description = "The subnet identifier of router interface",
+            required = false, multiValued = false)
+    String subnetId = null;
+
+    private static final String FMT = "subnetId=%s, tenantId=%s, portId=%s, routerId=%s";
+
+    @Override
+    protected void execute() {
+        RouterInterfaceService service = get(RouterInterfaceService.class);
+        if (subnetId != null) {
+            RouterInterface routerInterface = service
+                    .getRouterInterface(SubnetId.subnetId(subnetId));
+            printRouterInterface(routerInterface);
+        } else {
+            Iterable<RouterInterface> routerInterfaces = service
+                    .getRouterInterfaces();
+            for (RouterInterface routerInterface : routerInterfaces) {
+                printRouterInterface(routerInterface);
+            }
+        }
+    }
+
+    private void printRouterInterface(RouterInterface routerInterface) {
+        print(FMT, routerInterface.subnetId(), routerInterface.tenantId(),
+              routerInterface.portId(), routerInterface.routerId());
+    }
+}