Refactor cmdline parsing into gerrit-server

Now that both gerrit-sshd and gerrit-httpd use CmdLineParser, it makes
sense that the handlers for particular classes exist in a module
accessible by both.  This change moves the command line parsing portion
of SshModule into gerrit-server in a class called CmdLineParserModule.

Change-Id: I9312996a2b14106c039bc4c25ed80a52e3df79e7

gerrit-server/src/main/java/com/google/gerrit/server/args4j/AccountGroupUUIDHandler.java

@@ -0,0 +1,58 @@
+// Copyright (C) 2009 The Android Open Source Project
+//
+// 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 com.google.gerrit.server.args4j;
+
+import com.google.gerrit.common.data.GroupReference;
+import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.server.account.GroupBackend;
+import com.google.gerrit.server.account.GroupBackends;
+import com.google.inject.Inject;
+import com.google.inject.assistedinject.Assisted;
+
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.CmdLineParser;
+import org.kohsuke.args4j.OptionDef;
+import org.kohsuke.args4j.spi.OptionHandler;
+import org.kohsuke.args4j.spi.Parameters;
+import org.kohsuke.args4j.spi.Setter;
+
+public class AccountGroupUUIDHandler extends OptionHandler<AccountGroup.UUID> {
+  private final GroupBackend groupBackend;
+
+  @Inject
+  public AccountGroupUUIDHandler(final GroupBackend groupBackend,
+      @Assisted final CmdLineParser parser, @Assisted final OptionDef option,
+      @Assisted final Setter<AccountGroup.UUID> setter) {
+    super(parser, option, setter);
+    this.groupBackend = groupBackend;
+  }
+
+  @Override
+  public final int parseArguments(final Parameters params)
+      throws CmdLineException {
+    final String n = params.getParameter(0);
+    final GroupReference group = GroupBackends.findBestSuggestion(groupBackend, n);
+    if (group == null) {
+      throw new CmdLineException(owner, "Group \"" + n + "\" does not exist");
+    }
+    setter.addValue(group.getUUID());
+    return 1;
+  }
+
+  @Override
+  public final String getDefaultMetaVariable() {
+    return "GROUP";
+  }
+}