| Interface | Description | 
|---|---|
| ExceptionHandler | Transform an exception into useful end-user message. | 
| Class | Description | 
|---|---|
| DefaultExceptionHandler | Transform an exception into useful end-user message. | 
| ExceptionSummary | Provide a summary of the exception, containing:
 the exception itself,
 useful end-user message,
 useful reference to a solution, or set of solutions: this is usually a wiki page url in
 http://cwiki.apache.org/confluence/display/MAVEN/,
 
 child exception summaries.
  | 
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