TreeWalkerImpl - getNextSibling() implementation problem
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         Key: XERCESJ-1127
         URL: http://issues.apache.org/jira/browse/XERCESJ-1127
     Project: Xerces2-J
        Type: Bug
  Components: DOM (Level 2 Traversal & Range)  
    Versions: 2.7.1    
 Environment: OS : Windows

    Reporter: Jérôme Candat


Using a home-made DOM implementation, a problem has been raised while using the 
Xerces TreeWalker. 
One of our test consists in traversing the same XML file using Xerces alone and 
Xerces with our DOM implementation at the same time. Each result of the 
getNextSibling() method  is compared to verify that the result is the same. 
In this test, we experienced a problem since we did not have the same results. 

I found the problem in the TreeWalkerImpl class at line 315. At this line two 
nodes are compared with the '==' operator. Though it works fine when using 
Xerces by itself, it does not work when another DOM implementation is used. By 
replacing this operator by the 'isSameNode' method, we obtain valid results.

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