I&#39;m currently using JAXB to generate java classes in order to unmarshall XML. Now I would like to create a new schema very similar to the first and have the classes that are generated implement the same interface.

Say for example, I have two schema files which define XML with similar tags:

adult.xsd

&lt;!-- language: xml --&gt;

	&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
	&lt;xs:element name=&quot;Person&quot;&gt;
	  &lt;xs:complexType&gt;
	    &lt;xs:sequence&gt;
	      &lt;xs:element name=&quot;Name&quot; type=&quot;xs:string&quot; /&gt;
	      &lt;xs:element name=&quot;Age&quot; type=&quot;xs:integer&quot; /&gt;
	      &lt;xs:element name=&quot;Job&quot; type=&quot;xs:string&quot; /&gt;
	    &lt;/xs:sequence&gt;
	  &lt;/xs:complexType&gt;
	&lt;/xs:element&gt;

kid.xsd

&lt;!-- language: xml --&gt;

	&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
	&lt;xs:element name=&quot;Person&quot;&gt;
	  &lt;xs:complexType&gt;
	    &lt;xs:sequence&gt;
	      &lt;xs:element name=&quot;Name&quot; type=&quot;xs:string&quot; /&gt;
	      &lt;xs:element name=&quot;Age&quot; type=&quot;xs:integer&quot; /&gt;
	      &lt;xs:element name=&quot;School&quot; type=&quot;xs:string&quot; /&gt;
	    &lt;/xs:sequence&gt;
	  &lt;/xs:complexType&gt;
	&lt;/xs:element&gt;

Using JAXB and XJC I&#39;d like to generate two class files:

    public class Adult implements Person {
        ...
        public String getName() { ... }
        public int getAge() { ... }
        public String getJob { ... }
    }

    public class Kid implements Person {
        ...
        public String getName() { ... }
        public int getAge() { ... }
        public String getSchool { ... }
    }

where the Person interface defines the `getName()` and `getAge()` methods.

I&#39;ve looked at some of the [documentation][1] for mapping interfaces but this appears to only be for the situation when you already have java classes that you want to map to a DOM.

Also, I&#39;ve tried to use this [external plugin][2] but it doesn&#39;t appear to work. Here is my xjb binding file:

&lt;!-- language: xml --&gt;

	&lt;jxb:bindings version=&quot;1.0&quot; 
	  xmlns:jxb=&quot;http://java.sun.com/xml/ns/jaxb&quot; 
	  xmlns:xs=&quot;http://www.w3.org/2001/XMLSchema&quot; 
	  xmlns:xjc=&quot;http://java.sun.com/xml/ns/jaxb/xjc&quot;
	  xmlns:ext=&quot;http://xml.w-wins.com/xjc-plugins/interfaces&quot;
	  jxb:extensionBindingPrefixes=&quot;xjc&quot;&gt;
	
	    &lt;jxb:bindings schemaLocation=&quot;xsd/adult.xsd&quot; node=&quot;xs:schema/xs:complexType[@name=&#39;Person&#39;]&quot;&gt;
	        &lt;ext:interface&gt;mypackage.Hello&lt;/ext:interface&gt; 
	    &lt;/jxb:bindings&gt;
	
	&lt;/jxb:bindings&gt;

but this gives the following error:

&lt;!-- language: none --&gt;

	$ java -cp &quot;lib/activation.jar;lib/InterfacesXJCPlugin.jar;lib/jaxb1-impl.jar;lib/jaxb-api.jar;lib/jaxb-xjc.jar;lib/jsr173_1.0_api.jar&quot; com.sun.tools.xjc.XJCFacade -p mypackage.myxml -extension -Xinterfaces xsd/adult.xsd -b binding.xjb
	parsing a schema...
	[ERROR] XPath evaluation of &quot;xs:schema/xs:complexType[@name=&#39;Person&#39;]&quot; results in empty target node
	  line 8 of file:/C:/dev/jaxb/jaxb-ri/binding.xjb
	
	Failed to parse a schema.

Is it possible to generate a class with JAXB that implements an interface?

**Update**

I&#39;ve tried using the [Interface Insertion][3] plugin but for some reason can&#39;t get it to work. This is how I&#39;m calling xjc yet it is as if the plugin jar is not getting picked up from the classpath:

&lt;!-- language: none --&gt;

    $ java -cp &quot;lib/xjc-if-ins.jar;lib/jaxb-xjc.jar&quot; com.sun.tools.xjc.XJCFacade -p mypackage -extension -Xifins myschema.xsd -b binding.xjb

I get the error:

&lt;!-- language: none --&gt;

    unrecognized parameter -Xifins

Any ideas?


  [1]: https://jaxb.dev.java.net/guide/Mapping_interfaces.html
  [2]: http://xml.w-wins.com/xjc-plugins/interfaces/
  [3]: https://jaxb2-commons.dev.java.net/interface-insertion/

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Generating a JAXB class that implements an interface