[jira] [Work logged] (CAMEL-14155) xpath throws NPE if body is null when saxon is used as JAXP implementation

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAMEL-14155?focusedWorklogId=342701&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-342701 ]

ASF GitHub Bot logged work on CAMEL-14155:
------------------------------------------

                Author: ASF GitHub Bot
            Created on: 13/Nov/19 15:58
            Start Date: 13/Nov/19 15:58
    Worklog Time Spent: 10m 
      Work Description: luigidemasi commented on pull request #3335: CAMEL-14155: xpath throws NPE if body is null when saxon is used as J…
URL: https://github.com/apache/camel/pull/3335
 
 
   …AXP implementation
 
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 342701)
    Remaining Estimate: 0h
            Time Spent: 10m

> xpath throws NPE if body is null when saxon is used as JAXP implementation
> --------------------------------------------------------------------------
>
>                 Key: CAMEL-14155
>                 URL: https://issues.apache.org/jira/browse/CAMEL-14155
>             Project: Camel
>          Issue Type: Bug
>          Components: came-core
>            Reporter: Luigi De Masi
>            Assignee: Luigi De Masi
>            Priority: Major
>             Fix For: 3.0.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> despite [XPath API spec|https://docs.oracle.com/javase/8/docs/api/javax/xml/xpath/XPathExpression.html#evaluate-java.lang.Object-javax.xml.namespace.QName-] states:
>  
> {quote}If a null value is provided for item, an empty document will be used for the context
> {quote}
> saxon, starting from 9.6, they decided to ignore it and throw NPE if the node is null, from [saxon javadoc|https://www.saxonica.com/html/documentation9.8/javadoc/net/sf/saxon/xpath/XPathExpressionImpl.html#evaluate-java.lang.Object-javax.xml.namespace.QName-]:
>  
> {quote}Contrary to the interface specification, Saxon does not supply an empty document when the value is null. This is because XPath 2.0 allows the context item to be "absent" (null). So Saxon executes the XPath expression with the context item undefined.
> {quote}
>  
>  So in case of xpath expression is executed against a null body or header, saxon throws an NPE
>  
>  



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