I'm developing refactoring support for entity annotations and have run into 
following problem: I'm trying to change the value of an annotation attribute 
value, i.e. say I have an annotation @OneToMany(mappedBy="property") and I want 
to change the value from "property" to something else. I use following code for 
that:

To obtain a new StringLiteral:
StringLiteral literal = ((JavaModelPackage) reference.getAnnotation
().refImmediatePackage()).getStringLiteral().createStringLiteral
("newPropertyName");

And then setting the value to apporiate attribute value:
attri.setValue(literal);

This is done inside of a write JMI transaction. The problems with this are:
1. It doesn't seem to actually change the value 
2. After setting the new value I start to get IllegalStateExceptions from 
MetadataElement.testResourceChange (see attached stacktrace)

Possibly the problem lies in my usage of the API, but I don't know what exactly 
could cause this. The code to demonstrate this problem is checked in the 
release55 branch (module j2ee/refactoring), actual setting is performed in the 
performExternalChange method in the EntityRenameRefactoringElement class (inner 
class of EntityRenameRefactoring). This refactoring is however currently 
disabled because of this issue, it may activated by enabling lines 159 and 160 
in J2EERenameRefactoringPlugin. Attached is also two java classes representing 
entities for reproducing this problem, renaming getCustomer method in 
Order.java should demonstrate the issues described above.