@SuppressWarnings("unchecked")
private void condition() {
value();
if (token == Lexer.GREATER
|| token == Lexer.GREATEROREQUAL
|| token == Lexer.LESS
|| token == Lexer.LESSOREQUAL
|| token == Lexer.EQUAL
|| token == Lexer.NOTEQUAL) {
NonTerminal condition = NodeFactory.createNonTerminal(token);
condition.setLeft(root);
token = lexer.nextToken();
value();
condition.setRight(root);
root = condition;
} else {
throw new MalformedExpressionException(
String.format("Conditional operator instead of <%s> expected.", token));
}
}