From 15e3d267f612f83f2a8ed9d2c444fd34a7dfcea9 Mon Sep 17 00:00:00 2001 From: Florian Schmaus Date: Sun, 20 Sep 2020 18:17:44 +0200 Subject: [PATCH] Add Pair utility class --- .../org/jivesoftware/smack/util/Pair.java | 64 +++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 smack-core/src/main/java/org/jivesoftware/smack/util/Pair.java diff --git a/smack-core/src/main/java/org/jivesoftware/smack/util/Pair.java b/smack-core/src/main/java/org/jivesoftware/smack/util/Pair.java new file mode 100644 index 000000000..08bf41234 --- /dev/null +++ b/smack-core/src/main/java/org/jivesoftware/smack/util/Pair.java @@ -0,0 +1,64 @@ +/** + * + * Copyright 2020 Florian Schmaus. + * + * 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 org.jivesoftware.smack.util; + +public final class Pair { + + private final F first; + private final S second; + + private Pair(F first, S second) { + this.first = first; + this.second = second; + } + + public static Pair create(F first, S second) { + return new Pair<>(first, second); + } + + public static Pair createAndInitHashCode(F first, S second) { + Pair pair = new Pair<>(first, second); + pair.hashCode(); + return pair; + } + + public F getFirst() { + return first; + } + + public S getSecond() { + return second; + } + + private final HashCode.Cache hashCodeCache = new HashCode.Cache(); + + @Override + public int hashCode() { + return hashCodeCache.getHashCode(c -> + c.append(first) + .append(second) + ); + } + + @Override + public boolean equals(Object object) { + return EqualsUtil.equals(this, object, (e, o) -> + e.append(first, o.first) + .append(second, o.second) + ); + } +}