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12.44. Example Visitor Configuration
This example will use the
SAXVisitor implementation as follows:
@TextConsumer
public class ChangeItemState implements SAXVisitAfter
{
@StreamResultWriter
private SAXToXMLWriter xmlWriter;
@ConfigParam
private String newState;
public void visitAfter(SAXElement element, ExecutionContext executionContext)
throws SmooksException, IOException
{
element.setAttribute("state", newState);
xmlWriter.writeStartElement(element);
xmlWriter.writeText(element);
xmlWriter.writeEndElement(element);
}
}
Declaratively configuring
ChangeItemState to fire on <order-item> fragments having a status of OK is shown below:
<smooks-resource-list
xmlns="http://www.milyn.org/xsd/smooks-1.1.xsd">
<resource-config selector="order-items/order-item[@status = 'OK']">
<resource>com.acme.ChangeItemState </resource>
<param name="newState">COMPLETED</param>
</resource-config>
</smooks-resource-list>
Custom configuration namespaces can be used to define a cleaner and more strongly typed configuration for the
ChangeItemState component. A custom configuration namespace component is configured as follows:
<smooks-resource-list xmlns="http://www.milyn.org/xsd/smooks-1.1.xsd"
xmlns:order="http://www.acme.com/schemas/smooks/order.xsd">
<order:changeItemState itemElement="order-items/order-item[@status = 'OK']"
newState="COMPLETED" />
</smooks-resource-list>
This Visitor could also be configured in source code as follows:
Smooks smooks = new Smooks();
smooks.addVisitor(new ChangeItemState().setNewState("COMPLETED"),
"order-items/order-item[@status = 'OK']");
smooks.filterSource(new StreamSource(inReader), new StreamResult(outWriter));
