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Difference between revisions of "EclipseLink/UserGuide/MOXy/Runtime/Querying Objects by XPath"

Line 13: Line 13:
 
<source lang="Java">
 
<source lang="Java">
 
Customer customer = (Customer) jaxbContext.createUnmarshaller().unmarshal(instanceDoc);
 
Customer customer = (Customer) jaxbContext.createUnmarshaller().unmarshal(instanceDoc);
 +
 
int customerId = customer.getId();
 
int customerId = customer.getId();
 
customer.setFirstName("Bob");
 
customer.setFirstName("Bob");
 
customer.getPhoneNumber().setAreaCode("555");
 
customer.getPhoneNumber().setAreaCode("555");
 +
 
jaxbContext.createMarshaller().marshal(customer, System.out);
 
jaxbContext.createMarshaller().marshal(customer, System.out);
 
</source>
 
</source>
Line 23: Line 25:
 
<source lang="Java">
 
<source lang="Java">
 
Customer customer = (Customer) jaxbContext.createUnmarshaller().unmarshal(instanceDoc);
 
Customer customer = (Customer) jaxbContext.createUnmarshaller().unmarshal(instanceDoc);
 +
 
int customerId = jaxbContext.getValueByXPath(customer, "@id", null, Integer.class);
 
int customerId = jaxbContext.getValueByXPath(customer, "@id", null, Integer.class);
 
jaxbContext.setValueByXPath(customer, "first-name/text()", null, "Bob");
 
jaxbContext.setValueByXPath(customer, "first-name/text()", null, "Bob");
 
jaxbContext.setValueByXPath(customer, "phone-number/area-code/text()", null, "555");
 
jaxbContext.setValueByXPath(customer, "phone-number/area-code/text()", null, "555");
 +
 
jaxbContext.createMarshaller().marshal(customer, System.out);
 
jaxbContext.createMarshaller().marshal(customer, System.out);
 
</source>
 
</source>

Revision as of 14:12, 25 April 2011

EclipseLink MOXy

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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);


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