// Copyright (C) 2010 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.config;

import static com.google.gerrit.server.config.ConfigUtil.groupsFor;
import static java.util.Collections.unmodifiableSet;

import com.google.gerrit.reviewdb.AccountGroup;
import com.google.gerrit.reviewdb.ReviewDb;
import com.google.gwtorm.client.SchemaFactory;
import com.google.inject.Inject;
import com.google.inject.Provider;

import org.eclipse.jgit.lib.Config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Set;

public abstract class GroupSetProvider implements
    Provider<Set<AccountGroup.Id>> {
  private static final Logger log =
      LoggerFactory.getLogger(GroupSetProvider.class);

  protected Set<AccountGroup.Id> groupIds;

  @Inject
  protected GroupSetProvider(@GerritServerConfig Config config,
      SchemaFactory<ReviewDb> db, String section, String subsection, String name) {
    String[] groupNames = config.getStringList(section, subsection, name);
    groupIds = unmodifiableSet(groupsFor(db, groupNames, log));
  }

  @Override
  public Set<AccountGroup.Id> get() {
    return groupIds;
  }
}