Multiple policies not serialized correctly at service level (as portType PolicyURIs attribute)

The string concatenation at org.apache.axis2.description.AxisService2WSDL11#addPolicyAsExtAttribute is faulty.
What it does is:

String value = null;
for (Iterator iterator = policyURIs.iterator(); iterator.hasNext()

{ String uri = (String) iterator.next(); value = (value == null) ? uri : " " + uri; }

which is clearly wrong.