Rename refactoring for PsiLiteralExpression ?

I've got the following in a xml file which defines a bean :

]]>

And in a java class i ask for an instance of this bean :

context.getAliases("bug1N");

I've injected references so i have FindUsages and RenameRefactoring but FindUsages doesn't find the usage in the java file and rename refactoring doesn't rename the usage in java file.

If i understand all this things correctly i don't have rename refactoring in the java class because PsiLiteralExpression doesn't implement PsiNamedElement. Is there another way to allow this refactoring ?

Why FindUsages doesn't find usages in java classes ?

Thank you