RMQObjectFactory does not allow creating some variants of RMQDestination

[l-k-test]

Constructor RMQDestination(String destName, String amqpExchangeName, String amqpRoutingKey, String amqpQueueName) says the following:

amqpExchangeName and amqpRoutingKey must both be null if either is null, and amqpQueueName may be null, but atleast one of these three parameters must be non-null.

Basically it allows some parameters be null.

At the same time RMQObjectFactory has the following code:

    public Object createDestination(Reference ref, Hashtable<?, ?> environment, Name name, boolean topic) throws NamingException {
        this.logger.trace("Creating destination ref '{}', name '{}' (topic={}).", ref, name, topic);
        String dname = getStringProperty(ref, environment, "destinationName", false, null);
        boolean amqp = getBooleanProperty(ref, environment, "amqp", true, false);
        if (amqp) {
            String amqpExchangeName = getStringProperty(ref, environment, "amqpExchangeName", false, null);
            String amqpRoutingKey = getStringProperty(ref, environment,"amqpRoutingKey", false, null);
            String amqpQueueName = getStringProperty(ref, environment, "amqpQueueName", false, null);
            return new RMQDestination(dname, amqpExchangeName, amqpRoutingKey, amqpQueueName);
        } else {
            return new RMQDestination(dname, !topic, false);
        }
    }

amqpExchangeName, amqpRoutingKey, and amqpQueueName all retrieved by getStringProperty() with parameter mayBeNull set to false.

As a result an instance of RMQDestination with both amqpExchangeName and amqpRoutingKey set to null can be created with RMQDestination constructor but not via RMQObjectFactory.