Add openstack end point auto-completion feature for openstack-sync-state cmd.

Change-Id: If97f2db55ed14db4335378a7b6868ba6f0cc0b57
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/OpenStackEndPointCompleter.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/OpenStackEndPointCompleter.java
new file mode 100644
index 0000000..26aa5be
--- /dev/null
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/OpenStackEndPointCompleter.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018-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.openstacknetworking.cli;
+
+
+import org.apache.karaf.shell.console.Completer;
+import org.apache.karaf.shell.console.completer.StringsCompleter;
+
+import java.util.List;
+import java.util.SortedSet;
+
+/**
+ * OpenStack end point completer.
+ */
+public class OpenStackEndPointCompleter implements Completer {
+
+    private static final String OPENSTACK_ENDPOINT_EXAMPLE =
+            "http://IP address of OpenStack end point:35357/v2.0 ProjectName ID Password";
+    @Override
+    public int complete(String buffer, int cursor, List<String> candidates) {
+        StringsCompleter delegate = new StringsCompleter();
+
+        SortedSet<String> strings = delegate.getStrings();
+
+        strings.add(OPENSTACK_ENDPOINT_EXAMPLE);
+
+        return delegate.complete(buffer, cursor, candidates);
+    }
+}
diff --git a/apps/openstacknetworking/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/apps/openstacknetworking/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index d3884df..a525e86 100644
--- a/apps/openstacknetworking/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/apps/openstacknetworking/app/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -32,6 +32,9 @@
         </command>
         <command>
             <action class="org.onosproject.openstacknetworking.cli.OpenstackSyncStateCommand"/>
+            <completers>
+                <ref component-id="openStackEndPointCompleter"/>
+            </completers>
         </command>
         <command>
             <action class="org.onosproject.openstacknetworking.cli.OpenstackSecurityGroupListCommand"/>
@@ -70,4 +73,5 @@
     <bean id="ipAddressCompleter" class="org.onosproject.openstacknetworking.cli.IpAddressCompleter"/>
     <bean id="macAddressCompleter" class="org.onosproject.openstacknetworking.cli.MacAddressCompleter"/>
     <bean id="vlanIdCompleter" class="org.onosproject.openstacknetworking.cli.VlanIdCompleter"/>
+    <bean id="openStackEndPointCompleter" class="org.onosproject.openstacknetworking.cli.OpenStackEndPointCompleter"/>
 </blueprint>