ex8_42.txt

j2ee core design patterns

Example 8.42 	JavaBinder Class
import generated.Item;
import generated.PurchaseOrder;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;
import java.io.StringReader;
import java.util.Iterator;
import java.util.List;

public class JavaBinder {
	public JavaBinder() {
	}

	private Object parse(String xmlDocument) {
		Object o = null;
		try {
			JAXBContext jc =
					JAXBContext.newInstance("generated");
			Unmarshaller u = jc.createUnmarshaller();
			o = u.unmarshal(new StreamSource(
					new StringReader(xmlDocument)));
		} catch (JAXBException e) {
		}
		return o;
	}

	public void routeDocument(String xmlDocument) {
		Object o = parse(xmlDocument);
		if (o instanceof PurchaseOrder) {
			PurchaseOrder po = (PurchaseOrder) o;
			printIt(po);
			PurchaseOrderWebBroker broker =
					new PurchaseOrderWebBroker();
			broker.placeOrder(po);
		}
	}

	private void printIt(PurchaseOrder po) {
		System.out.println(po.getBillTo());
		System.out.println(po.getShipTo());
		System.out.println(po.getOrderDate());
		List items = po.getItems();
		Iterator i = items.iterator();
		while (i.hasNext()) {
			Item item = (Item) i.next();
			System.out.println("Id : " + item.getId() +
					" Name : " + item.getName() +
					" Price : " + item.getPrice());
		}
	}
}