/
case.go
78 lines (62 loc) · 1.67 KB
/
case.go
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
package exp
type (
caseElse struct {
result interface{}
}
caseWhen struct {
caseElse
condition interface{}
}
caseExpression struct {
value interface{}
whens []CaseWhen
elseCondition CaseElse
}
)
func NewCaseElse(result interface{}) CaseElse {
return caseElse{result: result}
}
func (ce caseElse) Result() interface{} {
return ce.result
}
func NewCaseWhen(condition, result interface{}) CaseWhen {
return caseWhen{caseElse: caseElse{result: result}, condition: condition}
}
func (cw caseWhen) Condition() interface{} {
return cw.condition
}
func NewCaseExpression() CaseExpression {
return caseExpression{value: nil, whens: []CaseWhen{}, elseCondition: nil}
}
func (c caseExpression) Expression() Expression {
return c
}
func (c caseExpression) Clone() Expression {
return caseExpression{value: c.value, whens: c.whens, elseCondition: c.elseCondition}
}
func (c caseExpression) As(alias interface{}) AliasedExpression {
return NewAliasExpression(c, alias)
}
func (c caseExpression) GetValue() interface{} {
return c.value
}
func (c caseExpression) GetWhens() []CaseWhen {
return c.whens
}
func (c caseExpression) GetElse() CaseElse {
return c.elseCondition
}
func (c caseExpression) Value(value interface{}) CaseExpression {
c.value = value
return c
}
func (c caseExpression) When(condition, result interface{}) CaseExpression {
c.whens = append(c.whens, NewCaseWhen(condition, result))
return c
}
func (c caseExpression) Else(result interface{}) CaseExpression {
c.elseCondition = NewCaseElse(result)
return c
}
func (c caseExpression) Asc() OrderedExpression { return asc(c) }
func (c caseExpression) Desc() OrderedExpression { return desc(c) }