protected boolean altSyntax() 
{
        return ContextUtil.isUseAltSyntax(getStack().getContext());
}

 protected String findString(String expr) 
{
        return (String) findValue(expr, String.class);
}

 protected Object findValue(String expr) 
{
        if (altSyntax()) {
            // does the expression start with %{ and end with }? if so, just cut it off!
            if (expr.startsWith("%{") && expr.endsWith("}")) {
                expr = expr.substring(2, expr.length() - 1);
            }
        }
        return getStack().findValue(expr);
}

 protected Object findValue(String expr,
    Class toType) 
{
        if (altSyntax() && toType == String.class) {
            return translateVariables(expr, getStack());
        } else {
            if (altSyntax()) {
                // does the expression start with %{ and end with }? if so, just cut it off!
                if (expr.startsWith("%{") && expr.endsWith("}")) {
                    expr = expr.substring(2, expr.length() - 1);
                }
            }
            return getStack().findValue(expr, toType);
        }
}

 protected String getBody() 
{
        if (bodyContent == null) {
            return "";
        } else {
            return bodyContent.getString().trim();
        }
}

 protected ValueStack getStack() 
{
        return TagUtils.getStack(pageContext);
}

 public  void setId(String string) 
{
        super.setId(string);
}

 protected String toString(Throwable t) 
{
        FastByteArrayOutputStream bout = new FastByteArrayOutputStream();
        PrintWriter wrt = new PrintWriter(bout);
        t.printStackTrace(wrt);
        wrt.close();
        return bout.toString();
}

 public static String translateVariables(String expression,
    ValueStack stack) 
{
        while (true) {
            int x = expression.indexOf("%{");
            int y = expression.indexOf("}", x);
            if ((x != -1) && (y != -1)) {
                String var = expression.substring(x + 2, y);
                Object o = stack.findValue(var, String.class);
                if (o != null) {
                    expression = expression.substring(0, x) + o + expression.substring(y + 1);
                } else {
                    // the variable doesn't exist, so don't display anything
                    expression = expression.substring(0, x) + expression.substring(y + 1);
                }
            } else {
                break;
            }
        }
        return expression;
}