Route CLI improvements and bug fixes

Change-Id: I4b4547f578cc053dc150066dadb68b6b2cbb82ee
diff --git a/cli/src/main/java/org/onosproject/cli/net/NextHopsListCommand.java b/cli/src/main/java/org/onosproject/cli/net/NextHopsListCommand.java
new file mode 100644
index 0000000..8d91130
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/net/NextHopsListCommand.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2016 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.cli.net;
+
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.incubator.net.routing.NextHop;
+import org.onosproject.incubator.net.routing.Route;
+import org.onosproject.incubator.net.routing.RouteService;
+
+import java.util.Collection;
+import java.util.Set;
+
+/**
+ * Command to show information about routing next hops.
+ */
+@Command(scope = "onos", name = "next-hops",
+        description = "Lists all next hops in the route store")
+public class NextHopsListCommand extends AbstractShellCommand {
+
+    private static final String FORMAT_HEADER =
+        "   Network            Next Hop";
+    private static final String FORMAT_ROUTE =
+        "   %-18s %-15s";
+
+    private static final String FORMAT_TABLE = "Table: %s";
+    private static final String FORMAT_TOTAL = "   Total: %d";
+
+    private static final String FORMAT = "ip=%s, mac=%s, numRoutes=%s";
+
+    @Override
+    protected void execute() {
+        RouteService service = AbstractShellCommand.get(RouteService.class);
+
+        Set<NextHop> nextHops = service.getNextHops();
+
+        nextHops.forEach(nextHop -> {
+            Collection<Route> routes = service.getRoutesForNextHop(nextHop.ip());
+            print(FORMAT, nextHop.ip(), nextHop.mac(), routes.size());
+        });
+
+    }
+
+}
diff --git a/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java b/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java
index d8adb61..4992d77 100644
--- a/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/RouteRemoveCommand.java
@@ -18,6 +18,7 @@
 
 import org.apache.karaf.shell.commands.Argument;
 import org.apache.karaf.shell.commands.Command;
+import org.onlab.packet.IpAddress;
 import org.onlab.packet.IpPrefix;
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.incubator.net.routing.Route;
@@ -36,13 +37,18 @@
             required = true)
     String prefixString = null;
 
+    @Argument(index = 1, name = "prefix", description = "Next hop IP address",
+            required = true)
+    String nextHopString = null;
+
     @Override
     protected void execute() {
         RouteAdminService service = AbstractShellCommand.get(RouteAdminService.class);
 
         IpPrefix prefix = IpPrefix.valueOf(prefixString);
+        IpAddress nextHop = IpAddress.valueOf(nextHopString);
 
-        service.withdraw(Collections.singleton(new Route(Route.Source.STATIC, prefix, null)));
+        service.withdraw(Collections.singleton(new Route(Route.Source.STATIC, prefix, nextHop)));
     }
 
 }
diff --git a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index cee8561..c92a5cf 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -505,6 +505,9 @@
         <command>
             <action class="org.onosproject.cli.net.RouteRemoveCommand"/>
         </command>
+        <command>
+            <action class="org.onosproject.cli.net.NextHopsListCommand"/>
+        </command>
 
         <command>
             <action class="org.onosproject.cli.net.GlobalLabelCommand"/>