EclipseLink/UserGuide/MOXy/Runtime/Querying Objects by XPath

From Eclipsepedia

Jump to: navigation, search

EclipseLink MOXy

link="http://wiki.eclipse.org/EclipseLink"
EclipseLink
Website
Download
Community
Mailing ListForumsIRC
Bugzilla
Open
Help Wanted
Bug Day
Contribute
Browse Source


Querying Objects by XPath

With EclipseLink MOXy, you do not have to use normal Javabean access methods to get and set values. Instead, you can use the APIs on the JAXBContext itself, at runtime.

For example, instead of:

Customer customer = (Customer) jaxbContext.createUnmarshaller().unmarshal(instanceDoc);
 
int customerId = customer.getId();
customer.setFirstName("Bob");
customer.getPhoneNumber().setAreaCode("555");
 
jaxbContext.createMarshaller().marshal(customer, System.out);

You could use XPath to access these values:

Customer customer = (Customer) jaxbContext.createUnmarshaller().unmarshal(instanceDoc);
 
int customerId = jaxbContext.getValueByXPath(customer, "@id", null, Integer.class);
jaxbContext.setValueByXPath(customer, "first-name/text()", null, "Bob");
jaxbContext.setValueByXPath(customer, "phone-number/area-code/text()", null, "555");
 
jaxbContext.createMarshaller().marshal(customer, System.out);


Eclipselink-logo.gif
Version: 2.2.0 - DRAFT
Other versions...