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3.4 Validation Event Handling

The interface javax.xml.bind.ValidationEventHandler is quite simple. Implementing classes must provide a single method to catch a ValidationEvent as we've seen it in the previous section.

boolean handleEvent( ValidationEvent event )

To register, the Unmarshaller method setEventHandler is called. If the calling object is implementing the event handler interface, we might write:
Unmarshaller u = jc.createUnmarshaller();
u.setEventHandler( this );

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