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// Copyright (C) 2017 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.query.group;
import static com.google.common.collect.ImmutableList.toImmutableList;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.entities.InternalGroup;
import com.google.gerrit.index.IndexConfig;
import com.google.gerrit.index.query.InternalQuery;
import com.google.gerrit.index.query.Predicate;
import com.google.gerrit.server.index.group.GroupIndexCollection;
import com.google.inject.Inject;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
/**
* Query wrapper for the group index.
*
* <p>Instances are one-time-use. Other singleton classes should inject a Provider rather than
* holding on to a single instance.
*/
public class InternalGroupQuery extends InternalQuery<InternalGroup, InternalGroupQuery> {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
@Inject
InternalGroupQuery(
GroupQueryProcessor queryProcessor, GroupIndexCollection indexes, IndexConfig indexConfig) {
super(queryProcessor, indexes, indexConfig);
}
public Optional<InternalGroup> byName(AccountGroup.NameKey groupName) {
return getOnlyGroup(GroupPredicates.name(groupName.get()), "group name '" + groupName + "'");
}
public Optional<InternalGroup> byId(AccountGroup.Id groupId) {
return getOnlyGroup(GroupPredicates.id(groupId), "group id '" + groupId + "'");
}
public List<InternalGroup> byMember(Account.Id memberId) {
return query(GroupPredicates.member(memberId));
}
/**
* Get all immediate parents of the provided {@code subgroupIds}.
*
* @return map pointing from children to list of its immediate parents
*/
public Map<AccountGroup.UUID, ImmutableSet<AccountGroup.UUID>> bySubgroups(
ImmutableSet<AccountGroup.UUID> subgroupIds) {
List<Predicate<InternalGroup>> predicates =
subgroupIds.stream().map(e -> GroupPredicates.subgroup(e)).collect(Collectors.toList());
ImmutableList<InternalGroup> groups = query(Predicate.or(predicates));
Map<AccountGroup.UUID, Set<AccountGroup.UUID>> parentsByChild =
Maps.newHashMapWithExpectedSize(groups.size());
subgroupIds.stream().forEach(c -> parentsByChild.put(c, new HashSet<>()));
for (InternalGroup parent : groups) {
for (AccountGroup.UUID child : parent.getSubgroups()) {
if (subgroupIds.contains(child)) {
parentsByChild.get(child).add(parent.getGroupUUID());
}
}
}
return parentsByChild.entrySet().stream()
.collect(Collectors.toMap(Map.Entry::getKey, e -> ImmutableSet.copyOf(e.getValue())));
}
private Optional<InternalGroup> getOnlyGroup(
Predicate<InternalGroup> predicate, String groupDescription) {
ImmutableList<InternalGroup> groups = query(predicate);
if (groups.isEmpty()) {
return Optional.empty();
}
if (groups.size() == 1) {
return Optional.of(Iterables.getOnlyElement(groups));
}
ImmutableList<AccountGroup.UUID> groupUuids =
groups.stream().map(InternalGroup::getGroupUUID).collect(toImmutableList());
logger.atWarning().log("Ambiguous %s for groups %s.", groupDescription, groupUuids);
return Optional.empty();
}
}