How to retrieve all keys from cache

[emily chen]

I have a JCS cache:
   
  JCS reportCache = JCS.getInstance("reportCache");
   
  // put serval reports object into cache.
  reportCache.put("report1", report1);
  reportCache.put("reprot2", report2);
  .......
   
  Now I want to retrieve all the keys from my reportCache. I think JCS should 
provide a method to do that, but I cannot find it in JCS API. 
   
  thanks for your help.
   
  Lucy

                        
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