62 lines
1.5 KiB
Java
62 lines
1.5 KiB
Java
/*
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* Copyright (C) 2009 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.bukkit.mcteam.gson;
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/**
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* A simple object that holds onto a pair of object references, first and second.
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*
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* @author Inderjeet Singh
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* @author Joel Leitch
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*
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* @param <FIRST>
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* @param <SECOND>
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*/
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final class Pair<FIRST, SECOND> {
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final FIRST first;
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final SECOND second;
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Pair(FIRST first, SECOND second) {
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this.first = first;
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this.second = second;
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}
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@Override
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public int hashCode() {
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return 17 * ((first != null) ? first.hashCode() : 0)
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+ 17 * ((second != null) ? second.hashCode() : 0);
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}
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@Override
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public boolean equals(Object o) {
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if (!(o instanceof Pair<?, ?>)) {
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return false;
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}
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Pair<?, ?> that = (Pair<?, ?>) o;
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return equal(this.first, that.first) && equal(this.second, that.second);
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}
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private static boolean equal(Object a, Object b) {
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return a == b || (a != null && a.equals(b));
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}
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@Override
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public String toString() {
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return String.format("{%s,%s}", first, second);
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}
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} |