ONOS-1612 - CLI completer for property names

Change-Id: Id3667f885d5d473385531308ffd486991136bfde

+/*
+ * 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.cli.cfg;
+
+import java.util.List;
+import java.util.SortedSet;
+
+import org.apache.felix.service.command.CommandSession;
+import org.apache.karaf.shell.console.CommandSessionHolder;
+import org.apache.karaf.shell.console.Completer;
+import org.apache.karaf.shell.console.completer.ArgumentCompleter;
+import org.apache.karaf.shell.console.completer.StringsCompleter;
+import org.onosproject.cfg.ComponentConfigService;
+import org.onosproject.cli.AbstractShellCommand;
+
+/**
+ * Component property name completer.
+ */
+public class ComponentPropertyNameCompleter implements Completer {
+    @Override
+    public int complete(String buffer, int cursor, List<String> candidates) {
+        // Delegate string completer
+        StringsCompleter delegate = new StringsCompleter();
+
+        CommandSession session = CommandSessionHolder.getSession();
+        ArgumentCompleter.ArgumentList list =
+                (ArgumentCompleter.ArgumentList) session.get(
+                        ArgumentCompleter.ARGUMENTS_LIST);
+
+        // Component name is the previous argument.
+        String componentName = list.getArguments()[list.getCursorArgumentIndex() - 1];
+        ComponentConfigService service =
+                AbstractShellCommand.get(ComponentConfigService.class);
+
+        SortedSet<String> strings = delegate.getStrings();
+        service.getProperties(componentName)
+                .forEach(property -> strings.add(property.name()));
+
+        // Now let the completer do the work for figuring out what to offer.
+        return delegate.complete(buffer, cursor, candidates);
+    }
+
+}

@@ -37,6 +37,7 @@
             <completers>
             <completers>
                 <ref component-id="cfgCommandCompleter"/>
                 <ref component-id="cfgCommandCompleter"/>
                 <ref component-id="componentNameCompleter"/>
                 <ref component-id="componentNameCompleter"/>
+                <ref component-id="componentPropertyNameCompleter"/>
                 <null/>
                 <null/>
             </completers>
             </completers>
         </command>
         </command>
@@ -317,6 +318,7 @@
     <bean id="appIdWithIntentNameCompleter" class="org.onosproject.cli.app.ApplicationIdWithIntentNameCompleter"/>
     <bean id="appIdWithIntentNameCompleter" class="org.onosproject.cli.app.ApplicationIdWithIntentNameCompleter"/>
     <bean id="cfgCommandCompleter" class="org.onosproject.cli.cfg.ComponentConfigCommandCompleter"/>
     <bean id="cfgCommandCompleter" class="org.onosproject.cli.cfg.ComponentConfigCommandCompleter"/>
     <bean id="componentNameCompleter" class="org.onosproject.cli.cfg.ComponentNameCompleter"/>
     <bean id="componentNameCompleter" class="org.onosproject.cli.cfg.ComponentNameCompleter"/>
+    <bean id="componentPropertyNameCompleter" class="org.onosproject.cli.cfg.ComponentPropertyNameCompleter"/>
     <bean id="nodeIdCompleter" class="org.onosproject.cli.NodeIdCompleter"/>
     <bean id="nodeIdCompleter" class="org.onosproject.cli.NodeIdCompleter"/>
     <bean id="deviceIdCompleter" class="org.onosproject.cli.net.DeviceIdCompleter"/>
     <bean id="deviceIdCompleter" class="org.onosproject.cli.net.DeviceIdCompleter"/>
     <bean id="clusterIdCompleter" class="org.onosproject.cli.net.ClusterIdCompleter"/>
     <bean id="clusterIdCompleter" class="org.onosproject.cli.net.ClusterIdCompleter"/>