Last change
on this file was 1, checked in by Wouter Pasman, 6 years ago |
Initial import : Genius 9.0.0
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File size:
828 bytes
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Rev | Line | |
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[1] | 1 | package agents.anac.y2010.Southampton.utils;
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| 2 |
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| 3 | public class Pair<A, B> {
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| 4 |
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| 5 | public final A fst;
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| 6 | public final B snd;
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| 7 |
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| 8 | public Pair(A fst, B snd) {
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| 9 | this.fst = fst;
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| 10 | this.snd = snd;
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| 11 | }
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| 12 |
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| 13 | public String toString() {
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| 14 | return "Pair[" + fst + "," + snd + "]";
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| 15 | }
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| 16 |
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| 17 | private static boolean equals(Object x, Object y) {
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| 18 | return (x == null && y == null) || (x != null && x.equals(y));
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| 19 | }
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| 20 |
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| 21 | public boolean equals(Object other) {
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| 22 | return other instanceof Pair && equals(fst, ((Pair<?, ?>) other).fst) && equals(snd, ((Pair<?, ?>) other).snd);
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| 23 | }
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| 24 |
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| 25 | public int hashCode() {
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| 26 | if (fst == null)
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| 27 | return (snd == null) ? 0 : snd.hashCode() + 1;
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| 28 | else if (snd == null)
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| 29 | return fst.hashCode() + 2;
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| 30 | else
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| 31 | return fst.hashCode() * 17 + snd.hashCode();
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| 32 | }
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| 33 |
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| 34 | public static <A, B> Pair<A, B> of(A a, B b) {
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| 35 | return new Pair<A, B>(a, b);
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| 36 | }
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| 37 | } |
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