1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
package Torello.Java.Additional;

import java.lang.reflect.Field;

/**
 * This simple generic-class allows for storing <B STYLE='color:red'>three</B> objects with a 
 * single reference.
 *
 * <EMBED CLASS=globalDefs DATA-KIND=Tuple DATA-N=3>
 * <EMBED CLASS='external-html' DATA-FILE-ID=MUTABLE_TUPLE>
 * @param <A> The type of the <B STYLE='color:red'>first</B> member-field ('{@link #a}').
 * @param <B> The type of the <B STYLE='color:red'>second</B> member-field ('{@link #b}').
 * @param <C> The type of the <B STYLE='color:red'>third</B> member-field ('{@link #c}').
 */
public class Tuple3<A, B, C>
    extends TupleN
    implements java.io.Serializable, Cloneable
{
    /** <EMBED CLASS='external-html' DATA-FILE-ID=SVUID>  */
    protected static final long serialVersionUID = 1;

    /** This holds a pointer the first field / instance. */
    public A a;

    /** This holds a pointer to the second field / instance. */
    public B b;

    /** This holds a pointer to the third field / instance. */
    public C c;

    /** Constructs this object */
    public Tuple3(A a, B b, C c)
    {
        this.a = a;
        this.b = b;
        this.c = c;
    }

    /** Constructs this object.  Initializes all fields to null. */
    public Tuple3()
    {
        this.a = null;
        this.b = null;
        this.c = null;
    }

    /**
     * Returns {@code '3'}, indicating how many fields are declared by this class.
     * @return As an instance of {@code Tuple3}, this method returns {@code '3'};
     */
    public int n() { return 3; }


    // Super-class uses this for toString, equals, and hashCode
    // There is an optimization, so if this is requested multiple times, it is saved in a
    // transient field.

    final Object[] asArrayInternal()
    { return new Object[] { a, b, c }; }

    public Tuple3<A, B, C> clone()
    { return new Tuple3<>(this.a, this.b, this.c); }

    /**
     * <EMBED CLASS=defs DATA-TEXT="Integer, Date">
     * <EMBED CLASS='external-html' DATA-FILE-ID=MULTI_TYPE_EX_COMMON>
     * <EMBED CLASS='external-html' DATA-FILE-ID=MULTI_TYPE_GET_EXAMPLE>
     */
    public Object get(final int i)
    {
        // Throws Exception if i not in [1..3]
        CHECK_GET(i);

        return (i <= 2)
            ? ((i == 1) ? a : b)
            : c;
    }

    public Ret3<A, B, C> toImmutable()
    { return new Ret3<>(this.a, this.b, this.c); }
}