public static Boolean evalBoolean(String propertyName, String propertyValue, Tag tag, PageContext pageContext) throws JspException{
    	
    	return (Boolean) ExpressionEvaluatorManager.evaluate(propertyName,
    			propertyValue, Boolean.class, tag, pageContext);
    }
public static Boolean evalBoolean ( String propertyName , String propertyValue , Tag tag , PageContext pageContext ) throws JspException { return ( Boolean ) ExpressionEvaluatorManager . evaluate ( propertyName , propertyValue , Boolean . class , tag , pageContext ) ; }
Evaluate the boolean EL expression passed as parameter
@param propertyName the property name
@param propertyValue the property value
@param tag the tag
@param pageContext the page context
@return the value corresponding to the EL expression passed as parameter
@throws JspException if an exception occurs