public QualifiedAttributeValueExp() 
{

}

Basic Constructor.

 public QualifiedAttributeValueExp(String className,
    String attr) 
{
        super(attr);
        this.className = className;
}

Creates a new QualifiedAttributeValueExp representing the specified object attribute, named attr with class name className.

 public ValueExp apply(ObjectName name) throws InvalidApplicationException, BadBinaryOpValueExpException, BadStringOperationException, BadAttributeValueExpException 
{
        try {
            MBeanServer server = QueryEval.getMBeanServer();
            String v = server.getObjectInstance(name).getClassName();
            if (v.equals(className)) {
                return super.apply(name);
            }
            throw new InvalidApplicationException("Class name is " + v +
                                                  ", should be " + className);
        } catch (Exception e) {
            throw new InvalidApplicationException("Qualified attribute: " + e);
            /* Can happen if MBean disappears between the time we
               construct the list of MBeans to query and the time we
               evaluate the query on this MBean, or if
               getObjectInstance throws SecurityException.  */
        }
}

Applies the QualifiedAttributeValueExp to an MBean.

 public String getAttrClassName() 
{
        return className;
}

Returns a string representation of the class name of the attribute.

 public String toString() 
{
        if (className != null) {
            return QueryParser.quoteId(className) + "#" +
                QueryParser.quoteId(super.toString());
        } else {
            return super.toString();
        }
}

Returns the string representing its value