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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
package bexpr
import (
"fmt"
"io"
"strings"
)
// TODO - Probably should make most of what is in here un-exported
//go:generate pigeon -o grammar.go -optimize-parser grammar.peg
//go:generate goimports -w grammar.go
type Expression interface {
ExpressionDump(w io.Writer, indent string, level int)
}
type UnaryOperator int
const (
UnaryOpNot UnaryOperator = iota
)
func (op UnaryOperator) String() string {
switch op {
case UnaryOpNot:
return "Not"
default:
return "UNKNOWN"
}
}
type BinaryOperator int
const (
BinaryOpAnd BinaryOperator = iota
BinaryOpOr
)
func (op BinaryOperator) String() string {
switch op {
case BinaryOpAnd:
return "And"
case BinaryOpOr:
return "Or"
default:
return "UNKNOWN"
}
}
type MatchOperator int
const (
MatchEqual MatchOperator = iota
MatchNotEqual
MatchIn
MatchNotIn
MatchIsEmpty
MatchIsNotEmpty
MatchMatches
MatchNotMatches
)
func (op MatchOperator) String() string {
switch op {
case MatchEqual:
return "Equal"
case MatchNotEqual:
return "Not Equal"
case MatchIn:
return "In"
case MatchNotIn:
return "Not In"
case MatchIsEmpty:
return "Is Empty"
case MatchIsNotEmpty:
return "Is Not Empty"
case MatchMatches:
return "Matches"
case MatchNotMatches:
return "Not Matches"
default:
return "UNKNOWN"
}
}
type MatchValue struct {
Raw string
Converted interface{}
}
type UnaryExpression struct {
Operator UnaryOperator
Operand Expression
}
type BinaryExpression struct {
Left Expression
Operator BinaryOperator
Right Expression
}
type Selector []string
func (sel Selector) String() string {
return strings.Join([]string(sel), ".")
}
type MatchExpression struct {
Selector Selector
Operator MatchOperator
Value *MatchValue
}
func (expr *UnaryExpression) ExpressionDump(w io.Writer, indent string, level int) {
localIndent := strings.Repeat(indent, level)
fmt.Fprintf(w, "%s%s {\n", localIndent, expr.Operator.String())
expr.Operand.ExpressionDump(w, indent, level+1)
fmt.Fprintf(w, "%s}\n", localIndent)
}
func (expr *BinaryExpression) ExpressionDump(w io.Writer, indent string, level int) {
localIndent := strings.Repeat(indent, level)
fmt.Fprintf(w, "%s%s {\n", localIndent, expr.Operator.String())
expr.Left.ExpressionDump(w, indent, level+1)
expr.Right.ExpressionDump(w, indent, level+1)
fmt.Fprintf(w, "%s}\n", localIndent)
}
func (expr *MatchExpression) ExpressionDump(w io.Writer, indent string, level int) {
switch expr.Operator {
case MatchEqual, MatchNotEqual, MatchIn, MatchNotIn:
fmt.Fprintf(w, "%[1]s%[3]s {\n%[2]sSelector: %[4]v\n%[2]sValue: %[5]q\n%[1]s}\n", strings.Repeat(indent, level), strings.Repeat(indent, level+1), expr.Operator.String(), expr.Selector, expr.Value.Raw)
default:
fmt.Fprintf(w, "%[1]s%[3]s {\n%[2]sSelector: %[4]v\n%[1]s}\n", strings.Repeat(indent, level), strings.Repeat(indent, level+1), expr.Operator.String(), expr.Selector)
}
}
|
