Bug 56730

Summary:	[Patch] NPE occurs when exporting a xslx as an XML if attached schema contains ref elements
Product:	POI	Reporter:	Marc <hae>
Component:	XSSF	Assignee:	POI Developers List <dev>
Status:	RESOLVED FIXED
Severity:	normal	Keywords:	PatchAvailable
Priority:	P2
Version:	3.11-dev
Target Milestone:	---
Hardware:	PC
OS:	All
Attachments:	Fixes NPE when exporting xml schema containing elements with ref attributes This is the right attachment

Description Marc 2014-07-16 14:48:23 UTC

A NPE occurs when exporting a xslx as an XML document if the attached schema contains ref elements. 

Here is an example of a xml schema which POI can't handle beacause of the xs:element ref attribute

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
    <xs:element name="Entry" type="Type_Entry"/>
    <xs:complexType name="Type_Entry">
        <xs:sequence>
             <xs:element ref="REFELEMENT" minOccurs="0"/>
        </xs:sequence>
    </xs:complexType>
    
    <xs:element name="REFELEMENT" type="xs:double"/>

</xs:schema>

I'm going to provide a patch for this issue.

Comment 1 Marc 2014-07-16 14:50:13 UTC

Created attachment 31819 [details]
Fixes NPE when exporting xml schema containing elements with ref attributes

Comment 2 Marc 2014-07-16 15:00:26 UTC

Created attachment 31820 [details]
This is the right attachment

Comment 3 Dominik Stadler 2014-08-28 21:41:58 UTC

Thanks for the patch, this is fixed for 3.11 via r1621209.