Wrapper style test in WSDL processing?

[Simon Laws]

There is a test to determine whether a WSDL operation follows the "wrapped"
style in accordance with JAX-WS 2.0 spec.  See WSDLOperationIntrospectorImpl
(
http://svn.apache.org/repos/asf/incubator/tuscany/java/sca/modules/interface-wsdl/src/main/java/org/apache/tuscany/sca/interfacedef/wsdl/impl/WSDLOperationIntrospectorImpl.java
)

The code is currently

    public boolean isWrapperStyle() throws InvalidWSDLException {
        if (wrapperStyle == null) {
            wrapperStyle =
                wrapper.getInputChildElements() != null && (
operation.getOutput() == null || wrapper
                    .getOutputChildElements() != null);
        }
        return wrapperStyle;
    }

Which doesn't seem to cater for the case where there may be no input
parameters. I'm diving into this code now to see if I can work out what it
means but if anyone has any insight I would appreciate it.

Needless to say I have a scenario where I am trying to auto generate WSDL
for a method with the signature

String myMethod()

And it's complaining that it's not wrapped.

Simon