flows cmd pretty print

Change-Id: I29b0971a5a862c602f8cd36f864f173c6d8330d6
diff --git a/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java b/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java
index da43255..f451582 100644
--- a/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java
+++ b/cli/src/main/java/org/onlab/onos/cli/net/FlowsListCommand.java
@@ -1,18 +1,22 @@
 package org.onlab.onos.cli.net;
 
-import com.google.common.collect.Maps;
-import org.apache.karaf.shell.commands.Command;
-import org.onlab.onos.cli.AbstractShellCommand;
-import org.onlab.onos.net.Device;
-import org.onlab.onos.net.device.DeviceService;
-import org.onlab.onos.net.flow.FlowRule;
-import org.onlab.onos.net.flow.FlowRuleService;
+import static com.google.common.collect.Lists.newArrayList;
 
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
-import static com.google.common.collect.Lists.newArrayList;
+import org.apache.karaf.shell.commands.Argument;
+import org.apache.karaf.shell.commands.Command;
+import org.onlab.onos.cli.AbstractShellCommand;
+import org.onlab.onos.net.Device;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.device.DeviceService;
+import org.onlab.onos.net.flow.FlowRule;
+import org.onlab.onos.net.flow.FlowRule.FlowRuleState;
+import org.onlab.onos.net.flow.FlowRuleService;
+
+import com.google.common.collect.Maps;
 
 /**
  * Lists all currently-known hosts.
@@ -22,14 +26,24 @@
 public class FlowsListCommand extends AbstractShellCommand {
 
     private static final String FMT =
-            "   id=%s, selector=%s, treatment=%s, state=%s";
+            "   id=%s, state=%s, bytes=%s, packets=%s, duration=%s, priority=%s";
+    private static final String TFMT = "      treatment=%s";
+    private static final String SFMT = "      selector=%s";
+
+    @Argument(index = 0, name = "state", description = "Flow rule state",
+            required = false, multiValued = false)
+    FlowRuleState state = null;
+
+    @Argument(index = 1, name = "uri", description = "Device ID",
+            required = false, multiValued = false)
+    String uri = null;
 
     @Override
     protected void execute() {
         DeviceService deviceService = get(DeviceService.class);
         FlowRuleService service = get(FlowRuleService.class);
         Map<Device, List<FlowRule>> flows = getSortedFlows(deviceService, service);
-        for (Device d : deviceService.getDevices()) {
+        for (Device d : flows.keySet()) {
             printFlows(d, flows.get(d));
         }
     }
@@ -42,8 +56,10 @@
      */
     protected Map<Device, List<FlowRule>> getSortedFlows(DeviceService deviceService, FlowRuleService service) {
         Map<Device, List<FlowRule>> flows = Maps.newHashMap();
-        List<FlowRule> rules;
-        for (Device d : deviceService.getDevices()) {
+        List<FlowRule> rules = newArrayList();
+        Iterable<Device> devices = uri == null ?  deviceService.getDevices() :
+            Collections.singletonList(deviceService.getDevice(DeviceId.deviceId(uri)));
+        for (Device d : devices) {
             rules = newArrayList(service.getFlowEntries(d.id()));
             Collections.sort(rules, Comparators.FLOW_RULE_COMPARATOR);
             flows.put(d, rules);
@@ -58,8 +74,15 @@
      */
     protected void printFlows(Device d, List<FlowRule> flows) {
         print("Device: " + d.id());
+        if (flows == null | flows.isEmpty()) {
+            print(" %s", "No flows installed.");
+            return;
+        }
         for (FlowRule f : flows) {
-            print(FMT, f.id().value(), f.selector(), f.treatment(), f.state());
+            print(FMT, Long.toHexString(f.id().value()), f.state(), f.bytes(),
+                    f.packets(), f.lifeMillis(), f.priority());
+            print(SFMT, f.selector().criteria());
+            print(TFMT, f.treatment().instructions());
         }
 
     }
diff --git a/cli/src/main/java/org/onlab/onos/cli/net/HostIdCompleter.java b/cli/src/main/java/org/onlab/onos/cli/net/HostIdCompleter.java
index 72c6a41..6da2d82 100644
--- a/cli/src/main/java/org/onlab/onos/cli/net/HostIdCompleter.java
+++ b/cli/src/main/java/org/onlab/onos/cli/net/HostIdCompleter.java
@@ -1,15 +1,15 @@
 package org.onlab.onos.cli.net;
 
+import java.util.Iterator;
+import java.util.List;
+import java.util.SortedSet;
+
 import org.apache.karaf.shell.console.Completer;
 import org.apache.karaf.shell.console.completer.StringsCompleter;
 import org.onlab.onos.cli.AbstractShellCommand;
 import org.onlab.onos.net.Host;
 import org.onlab.onos.net.host.HostService;
 
-import java.util.Iterator;
-import java.util.List;
-import java.util.SortedSet;
-
 public class HostIdCompleter implements Completer {
 
     @Override
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 5284477..6b867b3 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -72,6 +72,9 @@
 
         <command>
             <action class="org.onlab.onos.cli.net.FlowsListCommand"/>
+            <completers>
+                <ref component-id="deviceIdCompleter"/>
+            </completers>
         </command>
 
         <command>