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// 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.gerrit.common.data.GroupInfo;
import com.google.gerrit.common.data.GroupInfoCache;
import com.google.gerrit.reviewdb.AccountGroup;
import com.google.inject.Inject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/** Efficiently builds a {@link GroupInfoCache}. */
public class GroupInfoCacheFactory {
public interface Factory {
GroupInfoCacheFactory create();
}
private final GroupCache groupCache;
private final Map<AccountGroup.Id, AccountGroup> out;
@Inject
GroupInfoCacheFactory(final GroupCache groupCache) {
this.groupCache = groupCache;
this.out = new HashMap<AccountGroup.Id, AccountGroup>();
}
/**
* Indicate a group will be needed later on.
*
* @param id identity that will be needed in the future; may be null.
*/
public void want(final AccountGroup.Id id) {
if (id != null && !out.containsKey(id)) {
out.put(id, groupCache.get(id));
}
}
/** Indicate one or more groups will be needed later on. */
public void want(final Iterable<AccountGroup.Id> ids) {
for (final AccountGroup.Id id : ids) {
want(id);
}
}
public AccountGroup get(final AccountGroup.Id id) {
want(id);
return out.get(id);
}
/**
* Create an GroupInfoCache with the currently loaded AccountGroup entities.
* */
public GroupInfoCache create() {
final List<GroupInfo> r = new ArrayList<GroupInfo>(out.size());
for (final AccountGroup a : out.values()) {
r.add(new GroupInfo(a));
}
return new GroupInfoCache(r);
}
}
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