Hi,
Getting runtime metadata given an alias takes into account that same
alias may be used for more than one class. The particular method in
MetaDataRepository:
public ClassMetaData getMetaData(String alias, ClassLoader envLoader,
boolean mustExist)
filters the list of classes registered for the given alias by attempting
to reload each class by the given envLoader.
This filtering feature is causing an issue when I am using classes whose
bytecodes are generated dynamically.
The classes were enhanced and had their aliases registered. The
instances of these dynamic classes can be persisted as well.
When a query is issued, JPQLExpressionBuilder.getClassMetaData() invokes
above MetaDataRepository.getMetaData() method with the classloader X
where X = JPQLExpressionBuilder.getClass().getClassLoader(). X can not
reload by name the dynamically generated class that had been loaded by
a BCClassLoader from serp library.
1: Is there a way to instruct the query to use a specifc classloader or
ClassResolver?
2: Comment in abstract method getClassLoader() in
AbstractExpressionBuilder says:
/**
* Returns the class loader that should be used for resolving
* class names (in addition to the resolver in the query).
*/
protected abstract ClassLoader getClassLoader();
JPQLExpressionBuilder's implementation
protected ClassLoader getClassLoader() {
// we don't resolve in the context of anything but ourselves
return getClass().getClassLoader();
}
Is the implementation in synch with getClassLoader() contract as per
this JavaDoc?
However, the comment suggests that there may exist a way to attach a
ClassResolver to a query.
Regards --
Pinaki Poddar
972.834.2865
Notice: This email message, together with any attachments, may contain
information of BEA Systems, Inc., its subsidiaries and affiliated
entities, that may be confidential, proprietary, copyrighted and/or legally
privileged, and is intended solely for the use of the individual or entity
named in this message. If you are not the intended recipient, and have received
this message in error, please immediately return this by email and then delete
it.
