1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/task4/solution14/src/org/apidesign/apifest08/currency/Pair.java	Sat Oct 11 23:38:46 2008 +0200
     1.3 @@ -0,0 +1,53 @@
     1.4 +
     1.5 +package org.apidesign.apifest08.currency;
     1.6 +
     1.7 +
     1.8 +public final class Pair<A,B> {
     1.9 +
    1.10 +    private final A first;
    1.11 +    private final B second;
    1.12 +
    1.13 +    public Pair(A first, B second) {
    1.14 +	this.first = first;
    1.15 +	this.second = second;
    1.16 +    }
    1.17 +
    1.18 +    public A getFirst() { return first; }
    1.19 +    public B getSecond() { return second; }
    1.20 +
    1.21 +    @Override
    1.22 +    public String toString() {
    1.23 +        return "(" + first + ", " + second + ")";
    1.24 +    }
    1.25 +
    1.26 +    private static boolean equals(Object x, Object y) {
    1.27 +	return (x == null && y == null) || (x != null && x.equals(y));
    1.28 +    }
    1.29 +
    1.30 +    @Override
    1.31 +    public int hashCode() {
    1.32 +        int hash = 5;
    1.33 +        hash = 59 * hash + (this.first != null ? this.first.hashCode() : 0);
    1.34 +        hash = 59 * hash + (this.second != null ? this.second.hashCode() : 0);
    1.35 +        return hash;
    1.36 +    }
    1.37 +
    1.38 +    @Override
    1.39 +    public boolean equals(Object obj) {
    1.40 +        if (obj == null) {
    1.41 +            return false;
    1.42 +        }
    1.43 +        if (getClass() != obj.getClass()) {
    1.44 +            return false;
    1.45 +        }
    1.46 +        final Pair<A, B> other = (Pair<A, B>) obj;
    1.47 +        if (this.first != other.first && (this.first == null || !this.first.equals(other.first))) {
    1.48 +            return false;
    1.49 +        }
    1.50 +        if (this.second != other.second && (this.second == null || !this.second.equals(other.second))) {
    1.51 +            return false;
    1.52 +        }
    1.53 +        return true;
    1.54 +    }
    1.55 +
    1.56 +}