1 files changed, 69 insertions, 0 deletions
diff --git a/aai-traversal/src/main/resources/antlr4/org/onap/aai/dsl/v2/AAIDsl.g4 b/aai-traversal/src/main/resources/antlr4/org/onap/aai/dsl/v2/AAIDsl.g4
new file mode 100644
index 0000000..453c0fe
--- /dev/null
+++ b/aai-traversal/src/main/resources/antlr4/org/onap/aai/dsl/v2/AAIDsl.g4
@@ -0,0 +1,69 @@
+/**
+ * Define a parser grammar called AAIDsl
+ */
+grammar AAIDsl;
+
+aaiquery: startStatement limit?;
+
+startStatement: (vertex  ) (traversal)* ;
+nestedStatement:  (traversal)+ ;
+
+vertex: label store? (filter)?;
+
+//traversal:  (  vertex|unionVertex edge);
+traversal:  (edge* (vertex|unionVertex));
+
+filter:  (selectFilter)* (propertyFilter)* whereFilter?;
+propertyFilter: (not? '(' key (',' (key | num | bool))* ')');
+selectFilter: (not? '{' key (',' key)* '}');
+bool: BOOL;
+
+whereFilter: (not? '('  nestedStatement ')' );
+
+unionVertex: '[' ( nestedStatement ( comma (nestedStatement))*) ']' store?;
+
+comma: ',';
+edge: ( TRAVERSE|DIRTRAVERSE) (edgeFilter)?;
+
+edgeFilter: '(' key (',' key )* ')';
+
+num: NUM;
+limit: LIMIT num;
+label: (ID | NUM )+;
+key: KEY;
+
+store: STORE | selectFilter;
+not: NOT;
+
+BOOL: 'true'|'TRUE'|'false'|'FALSE';
+LIMIT: 'LIMIT'|'limit';
+NUM: (DIGIT)+;
+
+/*NODE: (ID | NUM )+;*/
+fragment ESCAPED_QUOTE : '\\' '\'';
+KEY : '\'' (ESCAPED_QUOTE | ~[\r\n] )*? '\'';
+
+AND: [&];
+
+STORE: [*];
+
+OR: [|];
+DIRTRAVERSE: '>>' | '<<' ;
+
+TRAVERSE: '>' ;
+
+EQUAL: [=];
+
+NOT: [!];
+
+fragment LOWERCASE  : [a-z] ;
+fragment UPPERCASE  : [A-Z] ;
+fragment DIGIT      : [0-9] ;
+fragment  ESC : '\\' . ;
+fragment ID_SPECIALS: [-:_];
+
+ID
+   :  ( LOWERCASE | UPPERCASE  | DIGIT | ID_SPECIALS)
+   ;
+
+WS : [ \t\r\n]+ -> skip ; // skip spaces, tabs, newlines