/** Parse an expression from text */
public ConstraintConnectiveDescr parse( final String text ) {
ConstraintConnectiveDescr constraint = null;
try {
DRLLexer lexer = DRLFactory.getDRLLexer(new ANTLRStringStream(text), languageLevel);
CommonTokenStream input = new CommonTokenStream( lexer );
RecognizerSharedState state = new RecognizerSharedState();
helper = new ParserHelper( input, state, languageLevel );
DRLExpressions parser = DRLFactory.getDRLExpressions(input, state, helper, languageLevel);
parser.setBuildDescr( true );