Hello,
I am currently running into an issue where XJC generates slightly different code from consecutive runs. Sometimes I end up with a method that returns JAXBElement<? extends Serializable> and other times returns JAXBElement<?>. If our code tried to do something like
JAXBElement<? extends Serializable> elem = obj.getTheJAXBElement();
then the build will fail sometimes and succeed other times, depending on the code generated by XJC. We can work around this by always only expecting JAXBElement<?> because we don't really care about the serializablity of the content object, but I'm just curious about what is causing this. At the moment we are using Java 6 with JAXB RI 2.1.10 and XJC 2.1.10.1, but we have also seen the same problem a couple of years ago when using Java 5 with an early (maybe even beta) version JAXB 2.0. Back then we just didn't use that element and stored our data in a different element. The schema we are using is an IEEE standard (IEEE 1512) so we can't modify it, here is the relevant element:
<xs:complexType name="AdminAreaGroup" >
<xs:choice minOccurs="1" maxOccurs="unbounded">
<xs:element name="city" type="Text-name255" />
<xs:element name="county" type="Text-name255" />
<xs:element name="state" type="Text-name255" />
<xs:element name="postalCode" type="PostalCode" />
<xs:element name="countryCode" type="CountryCode" />
<xs:element name="stateFIPS" type="Int-index8" />
<xs:element name="entityIPS" type="Int-index32" />
<xs:element name="countyFIPS" type="Int-index16" />
<xs:element name="cityFIPS" type="Int-index32" />
<xs:element name="localAdminAreaGroup" type="local:AdminAreaGroup" minOccurs="0"/>
</xs:choice>
</xs:complexType>
And the code that sometimes fails is
private static void adminAreasToOreo(final AdminAreaGroup adminAreas, final Incident inc) {
for (JAXBElement<? extends Serializable> county : adminAreas.getCityOrCountyOrState()) {
if (county.getName().getLocalPart().equals("county")) {
// do something
}
}
}
Again, not a big deal since changing <? extends Serializable> to <?> gets us around the problem, but more so just curious about the cause and any possible parameters that could be passed to XJC to avoid this in the future.
Thanks,
Craig McIlwee
Open Roads Consulting, Inc.
757-546-3401
http://www.openroadsconsulting.com
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