[xmlc] DocumentLoaderImpl Cache Keys

Here's my problem...  I want to switch which html file is used for a given 
generated interface X based on some request values.

I've gotten this ALMOST working by extending StandardDocumentLoader and 
overriding  getSourceFileName(Class).  The problem is that this value is then 
cached in the DocumentLoaderImpl superclass.  Then, when I make another request 
that should use a different html file for interface X, it uses the first html 
file that it already has cached.

I propose slightly changing how DocumentLoaderImpl makes cache keys.  If
---
protected CacheEntry getCacheEntry(Class docClass) {
  String name = docClass.getName();
  ...
}
---
was changed to 
---
protected String makeCacheKey(Class docClass) {
  return docClass.getName();
}
protected CacheEntry getCacheEntry(Class docClass) {
  String name = makeCacheKey(docClass);
  ...
}
---
then I could simply override makeCacheKey() and make it unique for each of my 
html files.

Does that sound okay?  Am I going about it all wrong?  The other option would 
be to make the templateCache member variable protected, and then I could just 
duplicate getCacheEntry() and tweak it to my needs.

Thanks in advance,
Erik


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