Declarative API for XML
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Ryan Cox
ryan.a.cox@gmail.com - http://www.asciiarmor.com
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Inspired by XSLTO, I’ve put together a bit of code to allow XSLT like tranformations from within Java. DAX glues together Java 5 annotations, Jaxen XPath and DOM4J to make possible the declarative style of processing shown below.


public class BindingTransform extends Transformer {

    public List items = new ArrayList();
    private RSSItem currentItem;

    public BindingTransform() {
        // tell engine about anticipated namespace
        setNamespace("dc", "http://purl.org/dc/elements/1.1/");
    }

    public void init() {
        items.clear();
    }

    public void complete() {
        for (RSSItem i : items) {
            System.out.println(i.getTitle());
        }
    }

    @Path("//item")
    public void item(Node node) {
        currentItem = new RSSItem();
        items.add(currentItem);
        applyTemplates(node);
    }

    @Path("item/title")
    public void title(Node node) {
        currentItem.setTitle(node.getStringValue());
    }

    @Path("item/link")
        public void link(Node node) {
        currentItem.setLink(node.getStringValue());
    }

    @Path("item/description")
    public void description(Node node) {
        currentItem.setDescription(node.getStringValue());
    }

    @Path("item/dc:creator")
    public void creator(Node node) {
        currentItem.setCreator(node.getStringValue());
    }
}