Examples with HqlParser org.hibernate.grammars.hql.HqlParser used on opensource projects

Example 1 with HqlParser

use of org.hibernate.grammars.hql.HqlParser in project hibernate-orm by hibernate.

the class StandardHqlTranslator method parseHql.

private HqlParser.StatementContext parseHql(String hql) {
    // Build the lexer
    final HqlLexer hqlLexer = HqlParseTreeBuilder.INSTANCE.buildHqlLexer(hql);
    // Build the parse tree
    final HqlParser hqlParser = HqlParseTreeBuilder.INSTANCE.buildHqlParser(hql, hqlLexer);
    // try to use SLL(k)-based parsing first - its faster
    hqlLexer.addErrorListener(ERR_LISTENER);
    hqlParser.getInterpreter().setPredictionMode(PredictionMode.SLL);
    hqlParser.removeErrorListeners();
    hqlParser.addErrorListener(ERR_LISTENER);
    hqlParser.setErrorHandler(new BailErrorStrategy());
    try {
        return hqlParser.statement();
    } catch (ParseCancellationException e) {
        // reset the input token stream and parser state
        hqlLexer.reset();
        hqlParser.reset();
        // fall back to LL(k)-based parsing
        hqlParser.getInterpreter().setPredictionMode(PredictionMode.LL);
        hqlParser.setErrorHandler(new DefaultErrorStrategy());
        return hqlParser.statement();
    } catch (ParsingException ex) {
        throw new SemanticException("A query exception occurred", hql, ex);
    }
}