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From "Michele Vivoda (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (JXPATH-172) JXPathContext#getPointer claims that null will be returned if the XPath expr does not point to a valid node
Date Thu, 27 Nov 2014 16:30:12 GMT

    [ https://issues.apache.org/jira/browse/JXPATH-172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14227810#comment-14227810
] 

Michele Vivoda commented on JXPATH-172:
---------------------------------------

Hi, you are right in saying {{null}} is never returned, I was perhaps not clear, an I know
you already know from JXPATH-171 but for reference:

bq. pointer will have a null value

I meant {{Pointer#getValue() == null}}

{{org.apache.commons.jxpath.ri.model.beans.NullPointer}}  is an implementation class that
I think theoretically should be not known to clients.

 I will try to put down a better javadoc.

> JXPathContext#getPointer claims that null will be returned if the XPath expr does not
point to a valid node
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: JXPATH-172
>                 URL: https://issues.apache.org/jira/browse/JXPATH-172
>             Project: Commons JXPath
>          Issue Type: Bug
>    Affects Versions: 1.3
>            Reporter: Michael Osipov
>            Assignee: Michael Osipov
>
> {quote}
> Traverses the xpath and returns a Pointer. A Pointer provides easy access to a property.
If the xpath matches no properties in the graph, the pointer will be null.
> {quote}
> This is not true because not {{null}} is returned but {{NullPointer}}. This makes a tremendous
difference.



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