001    package org.bridj.util;
002    
003    public class Tuple {
004            protected final Object[] data;
005            public Tuple(Object[] data) {
006                    this.data = data;
007            }
008            public Tuple(int n) {
009                    this.data = new Object[n];
010            }
011            @Override
012            public int hashCode() {
013                    int h = 0;
014                    for (int i = 0, n = size(); i < n; i++) {
015                            Object o = get(i);
016                            if (o == null)
017                                    continue;
018                            h ^= o.hashCode();
019                    }
020                    return h;
021            }
022            @Override
023            public boolean equals(Object obj) {
024                    if (obj == null || !(obj instanceof Tuple))
025                            return false;
026                    Tuple t = (Tuple)obj;
027                    int s = size();
028                    if (t.size() != s)
029                            return false;
030                    for (int i = 0; i < s; i++) {
031                            Object o1 = get(i), o2 = t.get(i);
032                            if (o1 == null) {
033                                    if (o2 != null)
034                                            return false;
035                            } else if (!o1.equals(o2))
036                                    return false;
037                    }
038                    return true;
039            }
040            public Object get(int index) {
041                    return data[index];
042            }
043            public void set(int index, Object value) {
044                    data[index] = value;
045            }
046            public int size() {
047                    return data.length;
048            }
049            @Override
050            public String toString() {
051                    StringBuilder b = new StringBuilder("{");
052                    for (int i = 0, n = size(); i < n; i++) {
053                            if (i != 0)
054                                    b.append(',');
055                            b.append('\n');
056                            b.append('\t').append(get(i));
057                    }
058                    b.append("\n}");
059                    return b.toString();
060            }
061    }