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1
10
11 package com.triactive.jdo.store;
12
13 import javax.jdo.JDOFatalInternalException;
14
15
16 class Index extends Key
17 {
18 private final boolean isUnique;
19
20
21 public Index(BaseTable table, boolean isUnique)
22 {
23 super(table);
24
25 this.isUnique = isUnique;
26 }
27
28
29 public Index(CandidateKey ck)
30 {
31 super(ck.getTable());
32
33 isUnique = true;
34 columns.addAll(ck.getColumns());
35 }
36
37
38 public Index(ForeignKey fk)
39 {
40 super(fk.getTable());
41
42 isUnique = false;
43 columns.addAll(fk.getColumns());
44 }
45
46
47 public boolean getUnique()
48 {
49 return isUnique;
50 }
51
52
53 public void setColumn(int seq, Column col)
54 {
55 assertSameTable(col);
56
57 setMinSize(columns, seq + 1);
58
59 if (columns.get(seq) != null)
60 throw new JDOFatalInternalException("Index part #" + seq + " for " + table + " already set");
61
62 columns.set(seq, col);
63 }
64
65
66 public void addColumn(Column col)
67 {
68 assertSameTable(col);
69
70 columns.add(col);
71 }
72
73
74 public int size()
75 {
76 return columns.size();
77 }
78
79
80 public int hashCode()
81 {
82 return (isUnique ? 0 : 1) ^ columns.hashCode();
83 }
84
85
86 public boolean equals(Object  o)
87 {
88 if (o == this)
89 return true;
90
91 if (!(o instanceof Index))
92 return false;
93
94 Index idx = (Index)o;
95
96 return isUnique == idx.isUnique && columns.equals(idx.columns);
97 }
98
99
100 public String toString()
101 {
102 return getColumnList();
103 }
104 }
105 |
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