tkobayas commented on code in PR #7096:
URL: https://github.com/apache/incubator-kie/pull/7096#discussion_r3977268610
##########
drools-drl/drools-drl-parser/src/main/java/org/drools/drl/parser/Drl6ExprParser.java:
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@@ -68,6 +70,26 @@ public ConstraintConnectiveDescr parse( final String text ) {
return constraint;
}
+ /**
+ * Returns whether to preserve the eval wrapper around the supplied
contents.
+ * The constraint parser enters at conditionalOrExpression, which is below
+ * ternaryExpression in the grammar, so a top-level ternary's branches are
+ * silently discarded. Question-mark tokens at any nesting depth may
indicate
+ * such a ternary. Strings and comments are ignored.
+ * Lexer errors also preserve the wrapper, leaving validation to
compilation.
+ * This is a conservative check, not validation of ternary syntax.
+ */
+ public static boolean shouldPreserveEval(String expression) {
+ DRL6Lexer lexer = new DRL6Lexer(new ANTLRStringStream(expression));
+ for (Token token = lexer.nextToken(); token.getType() != Token.EOF;
token = lexer.nextToken()) {
+ // QUESTION_DIV also covers a ternary immediately followed by a
comment: x?/*...*/y:z.
+ if (token.getType() == DRL6Lexer.QUESTION || token.getType() ==
DRL6Lexer.QUESTION_DIV) {
+ return true;
+ }
+ }
+ return !lexer.getErrors().isEmpty();
+ }
Review Comment:
@yesamer It should work, because the DRL6 resources exist in 7.x. (note that
`Drl6ExprParser` is `DrlExprParser` in 7.x)
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