[jira] Created: (JXPATH-134) NodeIterator usage in AttributeContext

NodeIterator usage in AttributeContext
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                 Key: JXPATH-134
                 URL: https://issues.apache.org/jira/browse/JXPATH-134
             Project: Commons JXPath
          Issue Type: Bug
    Affects Versions: 1.3
         Environment: JDK 1.5.0_12
            Reporter: Vladimir Orlov


There is the following piece of code in AttributeContext class, nextNode() 
method:

        if (!iterator.setPosition(iterator.getPosition() + 1)) {
            return false;
        }

It implies that the following precondition is satisfied in the NodeIterator 
implementation: in its initial state NodeIterator implementation has the 
position set in 0 when the first position index is actually 1. At the same time 
NodeIterator interface implies that the client code should call the 
setPosition() method of the NodeIterator first and only after that it can call 
the getPosition()  or getNodePointer(). There is no any information about such 
a strange condition to satisfy for the NodeIterator implementation in the 
Javadoc.

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