Hello:
I am looking for some help on enforcing the type-safety of the enumeration
values passed-in from the XML.
The current behavior I am seeing with JAXB RI ver. 2.1.9 is that the invalid
enumerations in XML are mapped to null values in the generated Java classes.
I expected to see an exception thrown whenever
Unmarshaller.unmarshal(xmlStreamReader, clazz) method is invoked with an XML
that has an invalid enum value.
I looked through the JAXB RI source while debugging and found that the
following method in
com.sun.xml.bind.v2.model.impl.RuntimeEnumLeafInfoImpl.java is returning a
null whenever the map (with all valid enum Strings) is looked-up using the
given enum value (in my case an invalid enum value):
<snip>
public T parse(CharSequence lexical) throws AccessorException,
SAXException {
// TODO: error handling
B b = baseXducer.parse(lexical);
if(b==null) {
return null;
}
return parseMap.get(b);
}
</snip>
This seems to be called from
com.sun.xml.bind.v2.runtime.reflect.TransducedAccessor.CompositeTransducedAccessorImpl
class. The following code snippet simply sets null to the Java Object (of
the generated JAXB Java class) whenever the previous method call is made
with an invalid enumeration.
<snip>
public void parse(BeanT bean, CharSequence lexical) throws
AccessorException, SAXException {
acc.set(bean,xducer.parse(lexical));
}
</snip>
Is this the expected behavior?
I expect the above method to check for the null return value of
xducer.parse(lexical) and throw an exception as the passed-in value does not
match any of the given enum values.
I have used the following XML annotation for type-safety:
<snip>
<xs:simpleType name="terminationType">
<xs:annotation>
<xs:appinfo>
<jaxb:typesafeEnumClass />
</xs:appinfo>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:enumeration value="NONE">
<xs:annotation>
<xs:appinfo>
<jaxb:typesafeEnumMember name="NONE" />
</xs:appinfo>
</xs:annotation>
</xs:enumeration>
<xs:enumeration value="REQUEST">
<xs:annotation>
<xs:appinfo>
<jaxb:typesafeEnumMember name="REQUEST" />
</xs:appinfo>
</xs:annotation>
</xs:enumeration>
<xs:enumeration value="RESPONSE">
<xs:annotation>
<xs:appinfo>
<jaxb:typesafeEnumMember name="RESPONSE" />
</xs:appinfo>
</xs:annotation>
</xs:enumeration>
<xs:enumeration value="EXCEPTION">
<xs:annotation>
<xs:appinfo>
<jaxb:typesafeEnumMember name="EXCEPTION" />
</xs:appinfo>
</xs:annotation>
</xs:enumeration>
</xs:restriction>
</xs:simpleType>
</snip>
Any help is much appreciated. Thank you.
Cheers,
Shashi
Twitter: @shashivelur
Blog:
http://www.shashivelur.com.blog
LinkedIn:
http://www.linkedin.com/in/shashivelur
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