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Find an Exception cause that we can handle. #11

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18 changes: 18 additions & 0 deletions src/main/java/cz/jirutka/spring/exhandler/RestHandlerExceptionResolver.java
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Original file line number Diff line number Diff line change
Expand Up @@ -134,12 +134,30 @@ protected ResponseEntity<?> handleException(Exception exception, HttpServletRequ
// This attribute is never set in MockMvc, so it's not covered in integration test.
request.removeAttribute(PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE);

exception = resolveExceptionCause(exception);
RestExceptionHandler<Exception, ?> handler = resolveExceptionHandler(exception.getClass());

LOG.debug("Handling exception {} with response factory: {}", exception.getClass().getName(), handler);
return handler.handleException(exception, request);
}

protected Exception resolveExceptionCause(Exception exception) {

Throwable lastCause = null;

for(Throwable cause = exception.getCause(); cause != null && (lastCause == null || !cause.equals(lastCause) && !cause.getClass().equals(lastCause.getClass())); cause = cause.getCause()) {
Class clazz1 = cause.getClass();
if(this.handlers.containsKey(clazz1)) {
return (Exception) cause;
}

lastCause = cause;
}

return exception;

}

@SuppressWarnings("unchecked")
protected RestExceptionHandler<Exception, ?> resolveExceptionHandler(Class<? extends Exception> exceptionClass) {

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