Beispiel #1
0
  private static final Node createNodeInternal(String expr) throws ELException {
    if (expr == null) {
      throw new ELException(MESSAGES.errorNullExpression());
    }

    Node n = (cache != null) ? cache.get(expr) : unlimitedCache.get(expr);
    if (n == null) {
      try {
        n = (new ELParser(new StringReader(expr))).CompositeExpression();

        // validate composite expression
        int numChildren = n.jjtGetNumChildren();
        if (numChildren == 1) {
          n = n.jjtGetChild(0);
        } else {
          Class<?> type = null;
          Node child = null;
          for (int i = 0; i < numChildren; i++) {
            child = n.jjtGetChild(i);
            if (child instanceof AstLiteralExpression) continue;
            if (type == null) type = child.getClass();
            else {
              if (!type.equals(child.getClass())) {
                throw new ELException(MESSAGES.errorMixedExpression(expr));
              }
            }
          }
        }

        if (n instanceof AstDeferredExpression || n instanceof AstDynamicExpression) {
          n = n.jjtGetChild(0);
        }
        if (cache != null) {
          cache.put(expr, n);
        } else {
          unlimitedCache.put(expr, n);
        }
      } catch (Exception e) {
        throw new ELException(MESSAGES.errorParse(expr), e);
      }
    }
    return n;
  }
  private static final Node createNodeInternal(String expr) throws ELException {
    if (expr == null) {
      throw new ELException(MessageFactory.get("error.null"));
    }

    Node n = cache.get(expr);
    if (n == null) {
      try {
        n = (new ELParser(new StringReader(expr))).CompositeExpression();

        // validate composite expression
        if (n instanceof AstCompositeExpression) {
          int numChildren = n.jjtGetNumChildren();
          if (numChildren == 1) {
            n = n.jjtGetChild(0);
          } else {
            Class type = null;
            Node child = null;
            for (int i = 0; i < numChildren; i++) {
              child = n.jjtGetChild(i);
              if (child instanceof AstLiteralExpression) continue;
              if (type == null) type = child.getClass();
              else {
                if (!type.equals(child.getClass())) {
                  throw new ELException(MessageFactory.get("error.mixed", expr));
                }
              }
            }
          }
        }
        if (n instanceof AstDeferredExpression || n instanceof AstDynamicExpression) {
          n = n.jjtGetChild(0);
        }
        cache.put(expr, n);
      } catch (ParseException pe) {
        throw new ELException("Error Parsing: " + expr, pe);
      }
    }
    return n;
  }