[jira] Resolved: (XERCESJ-1078) IdentityConstraint.getSelectorStr() might cause MPE

["Michael Glavassevich (JIRA)" <xe...@xml.apache.org>]

     [ http://issues.apache.org/jira/browse/XERCESJ-1078?page=all ]
     
Michael Glavassevich resolved XERCESJ-1078:
-------------------------------------------

    Resolution: Fixed

Though the XML Schema API does not say what value should be returned when the schema is invalid clearly we shouldn't be throwing an NPE. I've checked a fix into CVS.

> IdentityConstraint.getSelectorStr() might cause MPE
> ---------------------------------------------------
>
>          Key: XERCESJ-1078
>          URL: http://issues.apache.org/jira/browse/XERCESJ-1078
>      Project: Xerces2-J
>         Type: Bug
>   Components: XML Schema Structures
>     Versions: 2.6.2
>  Environment: Xerces2-J CVS HEAD (Mai 12, 2005)
>     Reporter: Kurt Riede
>  Attachments: attP006.xsd, patch.txt
>
> in case of an invalid schema file with the error "s4s-elt-must-match.2"
> (The content of 'identity constraint' must match (annotation?, selector, field+). Not enough elements were found.) the attribute fSelector might be null and thus the method getSelectorStr() causes a NPE.
> In my case, anylsing invalid schema files (as good as possible) it is important not to have this exception, so I'm working with my own patched version of Xerces2-J. It would be nice if you would fix this somewhen.
> Example from schema test suite to preproduce:
> msxsdtest\identityConstraint\idB059.xsd
> My fix is quite simple: just check on null:
> Old:
>         return fSelector.toString();
> New:
>         return fSelector == null ? null : fSelector.toString();

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