jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/util/Pair.java@f2fdd52e4e87

6944312: Potential rebranding issues in openjdk/langtools repository sources
Reviewed-by: darcy

     1 /*

     2  * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.tools.javac.util;

    28 /** A generic class for pairs.

    29  *

    30  *  <p><b>This is NOT part of any supported API.

    31  *  If you write code that depends on this, you do so at your own risk.

    32  *  This code and its internal interfaces are subject to change or

    33  *  deletion without notice.</b>

    34  */

    35 public class Pair<A, B> {

    37     public final A fst;

    38     public final B snd;

    40     public Pair(A fst, B snd) {

    41         this.fst = fst;

    42         this.snd = snd;

    43     }

    45     public String toString() {

    46         return "Pair[" + fst + "," + snd + "]";

    47     }

    49     private static boolean equals(Object x, Object y) {

    50         return (x == null && y == null) || (x != null && x.equals(y));

    51     }

    53     public boolean equals(Object other) {

    54         return

    55             other instanceof Pair<?,?> &&

    56             equals(fst, ((Pair<?,?>)other).fst) &&

    57             equals(snd, ((Pair<?,?>)other).snd);

    58     }

    60     public int hashCode() {

    61         if (fst == null) return (snd == null) ? 0 : snd.hashCode() + 1;

    62         else if (snd == null) return fst.hashCode() + 2;

    63         else return fst.hashCode() * 17 + snd.hashCode();

    64     }

    66     public static <A,B> Pair<A,B> of(A a, B b) {

    67         return new Pair<A,B>(a,b);

    68     }

    69 }

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