ls-groups: Support listing groups by group type

Change-Id: I4d25212f2b64de9b89481ee999381c69d4033c13
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

Documentation/cmd-ls-groups.txt

@@ -11,6 +11,7 @@ SYNOPSIS
 'ssh' -p <port> <host> 'gerrit ls-groups'
   [--project <NAME>]
   [--visible-to-all]
+  [--type {internal | ldap | system}]
 
 DESCRIPTION
 -----------
@@ -44,6 +45,16 @@ OPTIONS
 	(groups that are explicitly marked as visible to all registered
 	users).
 
+--type::
+	Display only groups of the specified type. If not specified,
+	groups of all types are displayed. Supported types:
++
+--
+`internal`:: Any group defined within Gerrit.
+`ldap`:: Any group defined by an external LDAP database.
+`system`:: Any system defined and managed group.
+--
+
 EXAMPLES
 --------
 

gerrit-server/src/main/java/com/google/gerrit/server/account/VisibleGroups.java

@@ -46,6 +46,7 @@ public class VisibleGroups {
 
   private Collection<ProjectControl> projects;
   private boolean onlyVisibleToAll;
+  private AccountGroup.Type groupType;
 
   @Inject
   VisibleGroups(final Provider<IdentifiedUser> currentUser,
@@ -66,6 +67,10 @@ public class VisibleGroups {
     this.onlyVisibleToAll = onlyVisibleToAll;
   }
 
+  public void setGroupType(final AccountGroup.Type groupType) {
+    this.groupType = groupType;
+  }
+
   public GroupList get() throws OrmException, NoSuchGroupException {
     final Iterable<AccountGroup> groups;
     if (projects != null && !projects.isEmpty()) {
@@ -103,7 +108,8 @@ public class VisibleGroups {
           continue;
         }
       }
-      if (onlyVisibleToAll && !group.isVisibleToAll()) {
+      if ((onlyVisibleToAll && !group.isVisibleToAll())
+          || (groupType != null && !groupType.equals(group.getType()))) {
         continue;
       }
       filteredGroups.add(group);

gerrit-sshd/src/main/java/com/google/gerrit/sshd/commands/ListGroupsCommand.java

@@ -18,6 +18,7 @@ import com.google.gerrit.common.data.GroupDetail;
 import com.google.gerrit.common.data.GroupList;
 import com.google.gerrit.common.errors.NoSuchGroupException;
 import com.google.gerrit.server.account.VisibleGroups;
+import com.google.gerrit.reviewdb.AccountGroup;
 import com.google.gerrit.server.project.ProjectControl;
 import com.google.gerrit.sshd.BaseCommand;
 import com.google.gwtorm.client.OrmException;
@@ -44,6 +45,9 @@ public class ListGroupsCommand extends BaseCommand {
   @Option(name = "--visible-to-all", usage = "to list only groups that are visible to all registered users")
   private boolean visibleToAll;
 
+  @Option(name = "--type", usage = "type of group")
+  private AccountGroup.Type groupType;
+
   @Override
   public void start(final Environment env) throws IOException {
     startThread(new CommandRunnable() {
@@ -61,6 +65,7 @@ public class ListGroupsCommand extends BaseCommand {
       final VisibleGroups visibleGroups = visibleGroupsFactory.create();
       visibleGroups.setProjects(projects);
       visibleGroups.setOnlyVisibleToAll(visibleToAll);
+      visibleGroups.setGroupType(groupType);
       final GroupList groupList = visibleGroups.get();
       for (final GroupDetail groupDetail : groupList.getGroups()) {
         stdout.print(groupDetail.group.getName() + "\n");