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1
10
11 package com.triactive.jdo.store;
12
13 import java.util.List  ;
14
15
16 class BooleanExpression extends SQLExpression
17 {
18 public BooleanExpression(QueryStatement qs)
19 {
20 super(qs);
21 }
22
23 public BooleanExpression(QueryStatement qs, QueryStatement.QueryColumn qsc)
24 {
25 super(qs, qsc);
26 }
27
28 public BooleanExpression(String functionName, List args)
29 {
30 super(functionName, args);
31 }
32
33 public BooleanExpression(MonadicOperator op, SQLExpression operand)
34 {
35 super(op, operand);
36 }
37
38 public BooleanExpression(SQLExpression operand1, DyadicOperator op, SQLExpression operand2)
39 {
40 super(operand1, op, operand2);
41 }
42
43 public BooleanExpression and(SQLExpression expr)
44 {
45 if (expr instanceof BooleanLiteral)
46 return expr.and(this);
47 else if (expr instanceof BooleanExpression)
48 return new BooleanExpression(this, OP_AND, expr);
49 else
50 return super.and(expr);
51 }
52
53 public BooleanExpression eor(SQLExpression expr)
54 {
55 if (expr instanceof BooleanLiteral)
56 return expr.eor(this);
57 else if (expr instanceof BooleanExpression)
58 {
59 if (qs.getStoreManager().getDatabaseAdapter().supportsBooleanComparison())
60 return new BooleanExpression(this, OP_NOTEQ, expr);
61 else
62 return and(expr.not()).ior(not().and(expr));
63 }
64 else
65 return super.eor(expr);
66 }
67
68 public BooleanExpression ior(SQLExpression expr)
69 {
70 if (expr instanceof BooleanLiteral)
71 return expr.ior(this);
72 else if (expr instanceof BooleanExpression)
73 return new BooleanExpression(this, OP_OR, expr);
74 else
75 return super.ior(expr);
76 }
77
78 public BooleanExpression not()
79 {
80 return new BooleanExpression(OP_NOT, this);
81 }
82
83 public BooleanExpression eq(SQLExpression expr)
84 {
85 if (expr instanceof BooleanLiteral || expr instanceof NullLiteral)
86 return expr.eq(this);
87 else if (expr instanceof BooleanExpression)
88 {
89 if (qs.getStoreManager().getDatabaseAdapter().supportsBooleanComparison())
90 return new BooleanExpression(this, OP_EQ, expr);
91 else
92 return and(expr).ior(not().and(expr.not()));
93 }
94 else
95 return super.eq(expr);
96 }
97
98 public BooleanExpression noteq(SQLExpression expr)
99 {
100 if (expr instanceof BooleanLiteral || expr instanceof NullLiteral)
101 return expr.noteq(this);
102 else if (expr instanceof BooleanExpression)
103 {
104 if (qs.getStoreManager().getDatabaseAdapter().supportsBooleanComparison())
105 return new BooleanExpression(this, OP_NOTEQ, expr);
106 else
107 return and(expr.not()).ior(not().and(expr));
108 }
109 else
110 return super.noteq(expr);
111 }
112
113 public BooleanExpression in(SQLExpression expr)
114 {
115 return new BooleanExpression(this, OP_IN, expr);
116 }
117 }
118 |
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