EclipseLink/Examples/SDO/SdoDynamic

Initialize the Types (Metadata)

The first thing that needs to be done in an SDO application is to set up the metadata for the Types and Properties. This is most commonly done by loading an XML schema, although it may also be done programmatically.

Code Example
FileInputStream xsdInputStream = new FileInputStream("Example.xsd");
XSDHelper.INSTANCE.define(xsdInputStream, null);

Unmarshal the XML Document

SDO is often used to manipulate XML data. The following code demonstrates how to unmarshal an XML document using the dynamic APIs.

Code Example
FileInputStream xmlInputStream = new FileInputStream("../Resource/bin/Customer-data.xml");
XMLDocument xmlDocument = XMLHelper.INSTANCE.load(xmlInputStream);
DataObject customer = xmlDocument.getRootObject();

Modify the Data Objects

Below is an example of manipulating the Data Objects using the dynamic APIs. Note how the dynamic accessors take an XPath instead of just a property name.

Code Example
DataObject phoneNumber = DataFactory.INSTANCE.create("urn:customer-example", "phone-number");
phoneNumber.set("number-type", "home");
phoneNumber.set("value", "(613) 555-3333");
customer.getList("contact-info/phone-number").add(phoneNumber);

Marshal the Data Objects

The following code segment demonstrates how to marshal DataObjects wrapped in a commonj.sdo.helper.XMLDocument back to XML.

Code Example
XMLHelper.INSTANCE.save(xmlDocument, System.out, null);