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copied!<p><strong>Note:</strong> I'm the <a href="http://www.eclipse.org/eclipselink/moxy.php" rel="nofollow"><strong>EclipseLink JAXB (MOXy)</strong></a> lead and a member of the <a href="http://jcp.org/en/jsr/detail?id=222" rel="nofollow"><strong>JAXB (JSR-222)</strong></a> expert group.</p> <p>You may be interested in the <code>@XmlNamedObjectGraph</code> extension we have added in EclipseLink 2.5.0. It allows you to define multiple views on your domain model. You can try this out today using a nightly build:</p> <ul> <li><a href="http://www.eclipse.org/eclipselink/downloads/nightly.php" rel="nofollow">http://www.eclipse.org/eclipselink/downloads/nightly.php</a></li> </ul> <p>Below I'll give an example:</p> <p><strong>Test</strong></p> <p>The <code>@XmlNamedObjectGraph</code> annotation is used to define subsets of the object graph that can be used when marshalling and unmarshalling.</p> <pre class="lang-java prettyprint-override"><code>import javax.xml.bind.annotation.*; import org.eclipse.persistence.oxm.annotations.*; @XmlNamedObjectGraph( name="only def", attributeNodes = { @XmlNamedAttributeNode("def") } ) @XmlRootElement public class Test { private String abc; private String def; public String getAbc() { return abc; } public void setAbc(String abc) { this.abc = abc; } public String getDef() { return def; } public void setDef(String def) { this.def = def; } } </code></pre> <p><strong>Demo</strong></p> <p>The <code>MarshallerProperties.OBJECT_GRAPH</code> can be used to specify which object graph should be marshallled.</p> <pre class="lang-java prettyprint-override"><code>import javax.xml.bind.*; import org.eclipse.persistence.jaxb.MarshallerProperties; public class Demo { public static void main(String[] args) throws Exception { JAXBContext jc = JAXBContext.newInstance(Test.class); Test test = new Test(); test.setAbc("FOO"); test.setDef("BAR"); Marshaller marshaller = jc.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); // Marshal the Entire Object marshaller.marshal(test, System.out); // Marshal Only What is Specified in the Object Graph marshaller.setProperty(MarshallerProperties.OBJECT_GRAPH, "only def"); marshaller.marshal(test, System.out); } } </code></pre> <p><strong>Output</strong></p> <p>Below is the output from running the demo code. The first time the instance of <code>Test</code> is marshalled it contains all the properties and the second time just the <code>def</code> property.</p> <pre class="lang-xml prettyprint-override"><code><?xml version="1.0" encoding="UTF-8"?> <test> <abc>FOO</abc> <def>BAR</def> </test> <?xml version="1.0" encoding="UTF-8"?> <test> <def>BAR</def> </test> </code></pre> <p><strong>For More Information</strong></p> <ul> <li><a href="http://blog.bdoughan.com/2013/03/moxys-object-graphs-inputoutput-partial.html" rel="nofollow">http://blog.bdoughan.com/2013/03/moxys-object-graphs-inputoutput-partial.html</a></li> <li><a href="http://blog.bdoughan.com/2013/03/moxys-object-graphs-partial-models-on.html" rel="nofollow">http://blog.bdoughan.com/2013/03/moxys-object-graphs-partial-models-on.html</a></li> </ul>

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