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Jsonpath.g4
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90 lines (63 loc) · 1.49 KB
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grammar Jsonpath;
//
// Derived from https://github.com/stevenalexander/antlr4-jsonpath-grammar
//
jsonpath: '$' path EOF
;
path : nodeExpr+
;
nodeExpr : dotExpr
| selectExpr
;
dotExpr : DOTS
| DOTS (Identifier | STAR | Length )
;
selectExpr : '[' (starExpr | rangeExpr | itemsExpr | namesExpr | filterExpr | scriptExpr)? ']'
;
rangeExpr : (startIndex=INT)? ':' (endIndex=INT (':' step=INT)?)?
;
itemsExpr : INT (',' INT)*
;
namesExpr: QUOTED (',' QUOTED)*
;
starExpr : STAR
;
filterExpr : FilterTrue queryExpr ')'
| FilterFalse queryExpr ')'
;
scriptExpr : '(' valueExpr ')'
;
queryExpr : '@.' exists=Identifier
| '@.' name=Identifier op=COMP value=(INT | NUMBER | QUOTED | 'true' | 'false' | 'null')
| '@.' name=Identifier op='=~' value=REGEX
;
valueExpr : '@.' name=Identifier op=OP value=(INT | NUMBER )
| '@.' name=Length op=OP value=(INT | NUMBER )
;
OP : '+' | '-' | '/' | '*'
;
COMP : '>' | '>=' | '<' | '<=' | '==' | '!='
;
Identifier : [a-zA-Z_][a-zA-Z0-9_]*
;
Length : 'length()'
;
INT : '-'? ('0'..'9')+
;
NUMBER : INT ('.' ('0'..'9')+)?
;
QUOTED : '\'' (~'\'')* '\''
;
REGEX : '/' (~'/')* '/' ('i'|'u'|'m'|'S')*
;
DOTS : '.'
| '..'
;
STAR : '*'
;
FilterTrue : '?('
;
FilterFalse : '!('
;
WS : [ \t\n\r]+ -> skip
;