Module java.xml

Interface ErrorListener


public interface ErrorListener
The listener interface used by a TransformerFactory or Transformer to notify callers of error messages that occur during a transformation process. An ErrorListener receives three levels of messages: warnings, errors and fatal errors as classified by their severity. Each of them is handled as described in their respective method.

An ErrorListener instance can be registered to a TransformerFactory or Transformer through the TransformerFactory.setErrorListener(ErrorListener) or Transformer.setErrorListener(ErrorListener) method to receive errors and warnings reported by the TransformerFactory or Transformer.

When a listener is registered, the TransformerFactory or Transformer must use this interface to pass on all warnings and errors to the listener and let the application decide how to handle them. Note that the TransformerFactory or Transformer is not required to continue with the transformation after a call to fatalError(TransformerException exception).

If an application does not provide a listener, the TransformerFactory or Transformer shall create one on its own. The default ErrorListener may take no action for warnings and recoverable errors, and allow the transformation to continue. However, the TransformerFactory or Transformer may still throw TransformerException when it decides it can not continue processing.

API Note:
It is recommended that applications register and use their own ErrorListener to override the default behavior in order to ensure proper handling of warnings and errors.
Since:
1.4