public ExpressionEvaluator(Tag sourceTag,
    PageContext context) 
{
        this.tag = sourceTag;
        this.pageContext = context;
}

Creates a new ExpressionEvaluator for the given tag and pagecontext.

Parameters:

sourceTag - tag where the expression has to be evaluated

context - the page context

 public Object eval(String attrName,
    String attrValue,
    Class returnClass) throws JspException 
{
        return attrValue != null ? ExpressionEvaluatorManager.evaluate(
            attrName,
            attrValue,
            returnClass,
            this.tag,
            this.pageContext) : null;
}

Evaluate expression in attrValue.

 public boolean evalBoolean(String attrName,
    String attrValue) throws JspException 
{
        return BooleanUtils.toBoolean((Boolean) eval(attrName, attrValue, Boolean.class));
}

Evaluate expression in attrValueas as a boolean.

 public int evalInt(String attrName,
    String attrValue) throws JspException 
{
        Integer rtn = (Integer) eval(attrName, attrValue, Integer.class);
        if (rtn != null)
        {
            return rtn.intValue();
        }
        return -1;
}

Evaluate expression in attrValueas as a int.

 public long evalLong(String attrName,
    String attrValue) throws JspException 
{
        Long rtn = (Long) eval(attrName, attrValue, Long.class);
        if (rtn != null)
        {
            return rtn.longValue();
        }
        return -1L;
}

Evaluate expression in attrValueas as a long.

 public String evalString(String attrName,
    String attrValue) throws JspException 
{
        return (String) eval(attrName, attrValue, String.class);
}

Evaluate expression in attrValueas as a String.