| // Copyright (C) 2011 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.account; |
| |
| import com.google.common.collect.Maps; |
| import com.google.gerrit.common.data.GroupDescription; |
| import com.google.gerrit.common.data.GroupInfoCache; |
| import com.google.gerrit.reviewdb.client.AccountGroup; |
| import com.google.inject.Inject; |
| |
| import java.util.Map; |
| |
| /** Efficiently builds a {@link GroupInfoCache}. */ |
| public class GroupInfoCacheFactory { |
| public interface Factory { |
| GroupInfoCacheFactory create(); |
| } |
| |
| private final GroupBackend groupBackend; |
| private final Map<AccountGroup.UUID, GroupDescription.Basic> out; |
| |
| @Inject |
| GroupInfoCacheFactory(GroupBackend groupBackend) { |
| this.groupBackend = groupBackend; |
| this.out = Maps.newHashMap(); |
| } |
| |
| /** |
| * Indicate a group will be needed later on. |
| * |
| * @param uuid identity that will be needed in the future; may be null. |
| */ |
| public void want(final AccountGroup.UUID uuid) { |
| if (uuid != null && !out.containsKey(uuid)) { |
| out.put(uuid, groupBackend.get(uuid)); |
| } |
| } |
| |
| /** Indicate one or more groups will be needed later on. */ |
| public void want(final Iterable<AccountGroup.UUID> uuids) { |
| for (final AccountGroup.UUID uuid : uuids) { |
| want(uuid); |
| } |
| } |
| |
| public GroupDescription.Basic get(final AccountGroup.UUID uuid) { |
| want(uuid); |
| return out.get(uuid); |
| } |
| } |