JAXB - Java Architecture for XML Binding

xjc created duplicate classes and won't compile

This happens if the xsd has elements that nest elements of the same name

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns="http://magicmonster.com/test/duplicates" xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified">
  <xs:element name="ErrorTest">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="ErrorTest">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Hello"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>
        

produces

..
@XmlRootElement(name = "ErrorTest")
public class ErrorTest {
..
..
    public static class ErrorTest {
..
        

Which does not compile due to 'Duplicate Class: ErrorTest'. Static inner classes can't have the same name as the parent class.

Solution to this is to create a xjb mapping to tell xjc how to transform the elements. You are control many things, including the java class names

<jxb:bindings version="1.0" xmlns:jxb="http://java.sun.com/xml/ns/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema"
              xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb
http://java.sun.com/xml/ns/jaxb/bindingschema_1_0.xsd"
    >
  <jxb:bindings schemaLocation="example.xsd"
                node="//xs:element[@name='ErrorTest']//xs:element[@name='ErrorTest']/xs:complexType">
    <jxb:class name="ErrorTestXXX"/>
  </jxb:bindings>
</jxb:bindings>
        

Note that it matches 'xs:complexType', not 'xs:element'