NonNullLinkedHashSet

[starksm64]

In the metadata project there is use of NonNullLinkedHashSet that is causing parse problems. In the jbossxb tests these uses have been commented out. What is the issue with this type?

[aloubyansky]

It was used for collections and specified with XmlElement.type which in case of collection types should be used to bind collection item to a Java type, not the collection impl class. AFAIK, there is no way to customize the collection impl using JAXB annotations.

[starksm64]

I dropped the usage of this type in the binding specification, and the ContainerConfigurationMetaData is parsing again.

[adrian.brock]

The purpose of the NonNullLinkedHashMap is so we keep the ordering of elements
and also to avoid nulls getting the metadata.

If you just use a normal HashMap you loose the ordering
(which maybe important in some places!)

If XMLElement.type is the wrong place to define the implementation class then
we should define our own annotation.

[aloubyansky]

Yes, we can do that or use NonNullLinkedHashMap explicitly, i.e. as the return type of the getter.