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12.28. SAX Visitor API Example

Illustrating API events using XML

This pulls together three interfaces into a single interface in the org.milyn.delivery.sax.SAXElementVisitor interface: 

<message>
    <target-fragment>      <!-- SAXVisitBefore.visitBefore -->
        Text!!             <!-- SAXVisitChildren.onChildText -->  
        <child>            <!-- SAXVisitChildren.onChildElement -->
        </child>
    </target-fragment>     <!-- SAXVisitAfter.visitAfter -->
</message>
The above is an illustration of a Source message event stream as XML. It could be EDI, CSV, JSON, or some other format. Consider it to be a Source message event stream, serialized as XML for easy reading.
As can be seen from the above SAX interfaces, the org.milyn.delivery.sax.SAXElement type is passed in all method calls. This object contains details about the targeted fragment element, including attributes and their values. It also contains methods for managing text accumulation, as well as accessing the Writer associated with any StreamResult instance that may have been passed in the Smooks.filterSource(Source, Result) method call.