[xstream-user] Using XStream with class hierarchy in Java 8 gives incorrect results

[Lesley Perkins]

Hello.  I'm running into an issue with XStream starting with Java 8.  This 
works correctly in Java 7.  Take the following example:

import java.io.*;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

public class XStreamJre8
{

   public static void main(String[] args)
   {
      Child child = new Child(2, 3);

      try
      {
         String fileName = new StringBuilder()
                  .append("child_")
                  .append(System.getProperty("java.version", "unknown"))
                  .append(".xml")
                  .toString();
         FileOutputStream out = new FileOutputStream(new File(fileName));
         XStream xStream = new XStream(new DomDriver());
         xStream.toXML(child, out);
         out.close();
      }
      catch (Exception e)
      {
         e.printStackTrace();
      }
   }

   static class Parent
   {
      private int parentVar;

      public Parent ()
      {
         this(-1);
      }

      public Parent(int parentVar)
      {
         this.parentVar = parentVar;
      }

      public int getParentVar()
      {
         return parentVar;
      }
   } // end class Parent

   static class Child extends Parent
   {
      private int childVar;

      public Child()
      {
         this(-1, -1);
      }

      public Child(int parentVar, int childVar)
      {
         super(parentVar);
         this.childVar = childVar;
      }

      public int getChildVar()
      {
         return childVar;
      }
   } // end class Child

}

When I execute this with Java 7u51, my output is:

<XStreamJre8_-Child>
  <parentVar>2</parentVar>
  <childVar>3</childVar>
</XStreamJre8_-Child>

However, when I execute with Java 8u or 8u11, my output is:

<XStreamJre8_-Child>
  <childVar>3</childVar>
</XStreamJre8_-Child>

You can see that the parent class is being ignored.  I'm not sure what changed 
that would cause this, but it's definitely an issue for me.  Any help/solutions 
would be appreciated.

--Andy

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