12.36. Implementing the SAXVisitor

To implement a SAXVisitor geared towards transforming the serialized form of a fragment, program Smooks so the SAXVisitor implementation will be writing to the StreamResult. This is because Smooks supports targeting of multiple SAXVisitor implementations at a single fragment, but only one SAXVisitor is allowed to write to the StreamResult, per fragment.

If a second SAXVisitor attempts to write to the StreamResult, a SAXWriterAccessException will result and you will need to modify your Smooks configuration.

To specify the StreamResult to write, the SAXVisitor needs to "acquire ownership" of the Writer to the StreamResult. It does this by making a call to the SAXElement.getWriter(SAXVisitor) method from inside the SAXVisitBefore.visitBefore methods implementation, passing this as the SAXVisitor parameter.