xml - MOXy ignores XmlElement(required=true) -

i have following pojos:

@xmlrootelement(name = "root") @xmlaccessortype(xmlaccesstype.field) public class datalist<t> {     @xmlelementwrapper(name="resulttablesection")     @xmlanyelement(lax = true)     public list<t> elements; }  @xmlrootelement(name = "resulttable") @xmlaccessortype(xmlaccesstype.field) public class event {     @xmlelement(name = "tsseventid", required = true)     public integer id;     ... } 

when in response xml tsseventid tag missing datalist in event.id field null regardless of set required=true. nothing fails. expected behavior ? how can enable validation ?

unmarshall code:

jaxbcontext.newinstance(datalist.class, hall.class).createunmarshaller().unmarshal(xmldocument); 

dependency:

<dependency>     <groupid>org.eclipse.persistence</groupid>     <artifactid>org.eclipse.persistence.moxy</artifactid>     <version>2.5.1</version> </dependency> 

a jaxb (jsr-222) implementation not expected throw exception or validationevent if required element missing. required flag on @xmlelement impacts how xml schema generated.

• http://docs.oracle.com/javase/7/docs/api/javax/xml/bind/annotation/xmlelement.html#required%28%29

demo

in demo code below have specified validationeventhandler on unmarshaller catch exceptions. running code either moxy or jaxb reference implementation won't result in exceptions being thrown.

import java.io.file; import javax.xml.bind.*;  public class demo {      public static void main(string[] args) throws exception {         jaxbcontext jc = jaxbcontext.newinstance(datalist.class, event.class);          unmarshaller unmarshaller = jc.createunmarshaller();          unmarshaller.seteventhandler(new validationeventhandler() {             @override             public boolean handleevent(validationevent event) {                 system.out.println(event.getmessage());                 return false;             }         });          file xml = new file("src/forum21593351/input.xml");         datalist dl = (datalist) unmarshaller.unmarshal(xml);          marshaller marshaller = jc.createmarshaller();         marshaller.setproperty(marshaller.jaxb_formatted_output, true);         marshaller.marshal(dl, system.out);      }  } 

input.xml/output

<?xml version="1.0" encoding="utf-8"?> <root>     <resulttablesection>         <resulttable>         </resulttable>     </resulttablesection> </root> 

enabling validation

how can enable validation ?

you can set instance of schema on unmarshaller have input validated.

• http://blog.bdoughan.com/2010/12/jaxb-and-marshalunmarshal-schema.html