public InstanceOfQueryExp(StringValueExp classNameValue) 
{
        if (classNameValue == null) {
            throw new IllegalArgumentException("Null class name.");
        }
        this.classNameValue = classNameValue;
}

Creates a new InstanceOfExp with a specific class name.

Parameters:

classNameValue - The StringValueExp returning the name of the class of which selected MBeans should be instances.

 public boolean apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException, BadAttributeValueExpException, InvalidApplicationException 
{
        // Get the class name value
        final StringValueExp val;
        try {
            val = (StringValueExp) classNameValue.apply(name);
        } catch (ClassCastException x) {
            // Should not happen - unless someone wrongly implemented
            // StringValueExp.apply().
            final BadStringOperationException y =
                    new BadStringOperationException(x.toString());
            y.initCause(x);
            throw y;
        }
        // Test whether the MBean is an instance of that class.
        try {
            return getMBeanServer().isInstanceOf(name, val.getValue());
        } catch (InstanceNotFoundException infe) {
            return false;
        }
}

Applies the InstanceOf on a MBean.

 public StringValueExp getClassNameValue() 
{
        return classNameValue;
}

Returns the class name.

 public String toString() 
{
       return "InstanceOf " + classNameValue.toString();
}

Returns a string representation of this InstanceOfQueryExp.