Mercurial > jdk8-mips64-public > langtools / annotate
src/share/classes/com/sun/tools/javac/util/Pair.java@f2fdd52e4e87 (annotated)
src/share/classes/com/sun/tools/javac/util/Pair.java
Thu, 10 Jun 2010 16:08:01 -0700
- author
- jjg
- date
- Thu, 10 Jun 2010 16:08:01 -0700
- changeset 581
- f2fdd52e4e87
- parent 554
- 9d9f26857129
- child 1664
- 330b35b27e68
- permissions
- -rw-r--r--
6944312: Potential rebranding issues in openjdk/langtools repository sources
Reviewed-by: darcy
| duke@1 | 1 | /* |
| ohair@554 | 2 | * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved. |
| duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@1 | 4 | * |
| duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
| duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
| ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
| duke@1 | 10 | * |
| duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@1 | 15 | * accompanied this code). |
| duke@1 | 16 | * |
| duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
| duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@1 | 20 | * |
| ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
| ohair@554 | 23 | * questions. |
| duke@1 | 24 | */ |
| duke@1 | 25 | |
| duke@1 | 26 | package com.sun.tools.javac.util; |
| duke@1 | 27 | |
| duke@1 | 28 | /** A generic class for pairs. |
| duke@1 | 29 | * |
| jjg@581 | 30 | * <p><b>This is NOT part of any supported API. |
| jjg@581 | 31 | * If you write code that depends on this, you do so at your own risk. |
| duke@1 | 32 | * This code and its internal interfaces are subject to change or |
| duke@1 | 33 | * deletion without notice.</b> |
| duke@1 | 34 | */ |
| duke@1 | 35 | public class Pair<A, B> { |
| duke@1 | 36 | |
| duke@1 | 37 | public final A fst; |
| duke@1 | 38 | public final B snd; |
| duke@1 | 39 | |
| duke@1 | 40 | public Pair(A fst, B snd) { |
| duke@1 | 41 | this.fst = fst; |
| duke@1 | 42 | this.snd = snd; |
| duke@1 | 43 | } |
| duke@1 | 44 | |
| duke@1 | 45 | public String toString() { |
| duke@1 | 46 | return "Pair[" + fst + "," + snd + "]"; |
| duke@1 | 47 | } |
| duke@1 | 48 | |
| duke@1 | 49 | private static boolean equals(Object x, Object y) { |
| duke@1 | 50 | return (x == null && y == null) || (x != null && x.equals(y)); |
| duke@1 | 51 | } |
| duke@1 | 52 | |
| duke@1 | 53 | public boolean equals(Object other) { |
| duke@1 | 54 | return |
| mcimadamore@184 | 55 | other instanceof Pair<?,?> && |
| mcimadamore@184 | 56 | equals(fst, ((Pair<?,?>)other).fst) && |
| mcimadamore@184 | 57 | equals(snd, ((Pair<?,?>)other).snd); |
| duke@1 | 58 | } |
| duke@1 | 59 | |
| duke@1 | 60 | public int hashCode() { |
| duke@1 | 61 | if (fst == null) return (snd == null) ? 0 : snd.hashCode() + 1; |
| duke@1 | 62 | else if (snd == null) return fst.hashCode() + 2; |
| duke@1 | 63 | else return fst.hashCode() * 17 + snd.hashCode(); |
| duke@1 | 64 | } |
| duke@1 | 65 | |
| duke@1 | 66 | public static <A,B> Pair<A,B> of(A a, B b) { |
| duke@1 | 67 | return new Pair<A,B>(a,b); |
| duke@1 | 68 | } |
| duke@1 | 69 | } |
