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xjc generates no JAXBElement for nillable element with required attribute  #858

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xjc generates no JAXBElement for nillable element with required attribute #858
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glassfishrobot
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Component: xjcERR: AssigneePriority: MajorType: Bug
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2.2.5
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@glassfishrobot
glassfishrobot
opened on Aug 30, 2011

Taken from CXF bug:
https://issues.apache.org/jira/browse/CXF-3732

Please consider the following schema:

<?xml version="1.0" encoding="UTF-8" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.example.org" targetNamespace="http://www.example.org" elementFormDefault="qualified">
  <xsd:element name="root">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element name="eal" nillable="true">
          <xsd:complexType>
            <xsd:simpleContent>
              <xsd:extension base="xsd:string">
<xsd:attribute name="att" type="xsd:string" use="required"/>
              </xsd:extension>
            </xsd:simpleContent>
          </xsd:complexType>
        </xsd:element>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

Running this through xjc generates a member eal of type Root.Eal in Root, not of type JAXBElement<Root.Eal>.
This makes it impossible to unmarshal a document like

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root xmlns="http://www.example.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <eal att="j" xsi:nil="true"/>
</root>

and obtain the value for attribute att in eal, since eal is null. The above XML document cannot be represented in the classes generated by xjc.

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