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// Copyright (C) 2012 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.Iterables;
import com.google.gerrit.common.data.GroupReference;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.project.ProjectControl;
import java.util.Collection;
import java.util.Comparator;
import javax.annotation.Nullable;
/**
* Utility class for dealing with a GroupBackend.
*/
public class GroupBackends {
public static final Comparator<GroupReference> GROUP_REF_NAME_COMPARATOR =
new Comparator<GroupReference>() {
@Override
public int compare(GroupReference a, GroupReference b) {
return a.getName().compareTo(b.getName());
}
};
/**
* Runs {@link GroupBackend#suggest(String, Project)} and filters the result to return
* the best suggestion, or null if one does not exist.
*
* @param groupBackend the group backend
* @param name the name for which to suggest groups
* @return the best single GroupReference suggestion
*/
@Nullable
public static GroupReference findBestSuggestion(GroupBackend groupBackend,
String name) {
return findBestSuggestion(groupBackend, name, null);
}
/**
* Runs {@link GroupBackend#suggest(String, Project)} and filters the result to return
* the best suggestion, or null if one does not exist.
*
* @param groupBackend the group backend
* @param name the name for which to suggest groups
* @param project the project for which to suggest groups
* @return the best single GroupReference suggestion
*/
@Nullable
public static GroupReference findBestSuggestion(GroupBackend groupBackend,
String name, @Nullable ProjectControl project) {
Collection<GroupReference> refs = groupBackend.suggest(name, project);
if (refs.size() == 1) {
return Iterables.getOnlyElement(refs);
}
for (GroupReference ref : refs) {
if (isExactSuggestion(ref, name)) {
return ref;
}
}
return null;
}
/**
* Runs {@link GroupBackend#suggest(String, Project)} and filters the result to return
* the exact suggestion, or null if one does not exist.
*
* @param groupBackend the group backend
* @param name the name for which to suggest groups
* @return the exact single GroupReference suggestion
*/
@Nullable
public static GroupReference findExactSuggestion(
GroupBackend groupBackend, String name) {
return findExactSuggestion(groupBackend, name, null);
}
/**
* Runs {@link GroupBackend#suggest(String, Project)} and filters the result to return
* the exact suggestion, or null if one does not exist.
*
* @param groupBackend the group backend
* @param name the name for which to suggest groups
* @param project the project for which to suggest groups
* @return the exact single GroupReference suggestion
*/
@Nullable
public static GroupReference findExactSuggestion(
GroupBackend groupBackend, String name, ProjectControl project) {
Collection<GroupReference> refs = groupBackend.suggest(name, project);
for (GroupReference ref : refs) {
if (isExactSuggestion(ref, name)) {
return ref;
}
}
return null;
}
/** Returns whether the GroupReference is an exact suggestion for the name. */
public static boolean isExactSuggestion(GroupReference ref, String name) {
return ref.getName().equalsIgnoreCase(name) || ref.getUUID().get().equals(name);
}
private GroupBackends() {
}
}
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