<Swing Dev> [8] Review request for 8027066: XMLDecoder in java 7 cannot properly deserialize object arrays

[anton nashatyrev]

Hello,
     could you please review the following fix:

fix: http://cr.openjdk.java.net/~alitvinov/8027066/webrev.01 
<http://cr.openjdk.java.net/%7Ealitvinov/8027066/webrev.01>
bug: https://bugs.openjdk.java.net/browse/JDK-8027066

The problem: when serializing-deserializing an object which fields refer 
to the same array instance, one of the fields is not initialized

The reason: The ElementHandler.isArgument() returns false when the 
serialized element contains 'id' which is our case since the second 
object field refers the first field value by 'id':
<java version="1.7.0_45" class="java.beans.XMLDecoder">
  <object class="XMLEncoderTests$Wrapper">
   <void property="detailedMessages">
    <array class="java.lang.String" length="2" id="StringArray0">
     <void index="0">
      <string>First message</string>
     </void>
     <void index="1">
      <string>Second message</string>
     </void>
    </array>
   </void>
   <void property="messages">
    <object idref="StringArray0"/>
   </void>
  </object>
</java>

When the isArgument() returns false the value created isn't passed up to 
its parent. This issue resolved in the ObjectElementHandler by 
overriding isArgument() to always return true. Though the same is not 
done in the ArrayElementHandler.

The solution: override the isArgument() in the ArrayElementHandler the 
same way as in ObjectElementHandler

Thanks!
Anton.