[jira] [Comment Edited] (JXPATH-177) Pipe in combination with variables causes NullPointerException

["Martin Xarx (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JXPATH-177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14583236#comment-14583236 ] 

Martin Xarx edited comment on JXPATH-177 at 6/12/15 10:47 AM:
--------------------------------------------------------------

I've appended a test-case jx177.zip. When executing the test, I get the mentioned exception. When you comment out the "xp" variable definition and replace it with any definition above, the test finishes with success.


was (Author: xarx):
Test case

> Pipe in combination with variables causes NullPointerException
> --------------------------------------------------------------
>
>                 Key: JXPATH-177
>                 URL: https://issues.apache.org/jira/browse/JXPATH-177
>             Project: Commons JXPath
>          Issue Type: Bug
>            Reporter: Martin Xarx
>         Attachments: TestJxPath177.java, jx177.zip
>
>
> xpath: name", result: ROOT name
> xpath: /x/name", result: X name
> xpath: $__root/x/name", result: X name
> xpath: $__root/x/name|name, causes:
> Exception in thread "main" java.lang.NullPointerException
> 	at org.apache.commons.jxpath.ri.model.dynamic.DynamicPointer.hashCode(DynamicPointer.java:126)
> 	at org.apache.commons.jxpath.ri.model.beans.PropertyPointer.hashCode(PropertyPointer.java:221)
> 	at java.util.HashMap.hash(HashMap.java:338)
> 	at java.util.HashMap.containsKey(HashMap.java:595)
> 	at java.util.HashSet.contains(HashSet.java:203)
> 	at org.apache.commons.jxpath.ri.model.NodePointer.compareTo(NodePointer.java:759)
> 	at java.util.ComparableTimSort.countRunAndMakeAscending(ComparableTimSort.java:316)
> 	at java.util.ComparableTimSort.sort(ComparableTimSort.java:184)
> 	at java.util.Arrays.sort(Arrays.java:1312)
> 	at java.util.Arrays.sort(Arrays.java:1506)
> 	at java.util.ArrayList.sort(ArrayList.java:1454)
> 	at java.util.Collections.sort(Collections.java:141)
> 	at org.apache.commons.jxpath.ri.EvalContext.sortPointers(EvalContext.java:206)
> 	at org.apache.commons.jxpath.ri.axes.UnionContext.setPosition(UnionContext.java:68)
> 	at org.apache.commons.jxpath.ri.axes.NodeSetContext.nextNode(NodeSetContext.java:68)
> 	at org.apache.commons.jxpath.ri.EvalContext.getSingleNodePointer(EvalContext.java:312)
> 	at org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.getPointer(JXPathContextReferenceImpl.java:464)
> 	at org.apache.commons.jxpath.ri.JXPathContextReferenceImpl.getPointer(JXPathContextReferenceImpl.java:452)
> I'm using model created from java containers (Lists, Maps):
> {
> 	"name" : "ROOT name",
> 	"x" : {
> 		"name" : "X name"
> 	}
> }
> The context is set to the root node. I'm using the following code:
>     JXPathContext xpathContext = JXPathContext.newContext(root);
>     Pointer p = contextContext.getPointer(xpath);
>     return p.getNode();



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