diff options
Diffstat (limited to 'java/com/google/gerrit/server/account/AccountInfoComparator.java')
-rw-r--r-- | java/com/google/gerrit/server/account/AccountInfoComparator.java | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/account/AccountInfoComparator.java b/java/com/google/gerrit/server/account/AccountInfoComparator.java new file mode 100644 index 0000000000..533decef44 --- /dev/null +++ b/java/com/google/gerrit/server/account/AccountInfoComparator.java @@ -0,0 +1,52 @@ +// Copyright (C) 2015 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.ComparisonChain; +import com.google.common.collect.Ordering; +import com.google.gerrit.extensions.common.AccountInfo; +import java.util.Comparator; + +public class AccountInfoComparator extends Ordering<AccountInfo> + implements Comparator<AccountInfo> { + public static final AccountInfoComparator ORDER_NULLS_FIRST = new AccountInfoComparator(); + public static final AccountInfoComparator ORDER_NULLS_LAST = + new AccountInfoComparator().setNullsLast(); + + private boolean nullsLast; + + private AccountInfoComparator() {} + + private AccountInfoComparator setNullsLast() { + this.nullsLast = true; + return this; + } + + @Override + public int compare(AccountInfo a, AccountInfo b) { + return ComparisonChain.start() + .compare(a.name, b.name, createOrdering()) + .compare(a.email, b.email, createOrdering()) + .compare(a._accountId, b._accountId, createOrdering()) + .result(); + } + + private <S extends Comparable<?>> Ordering<S> createOrdering() { + if (nullsLast) { + return Ordering.natural().nullsLast(); + } + return Ordering.natural().nullsFirst(); + } +} |