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https://issues.apache.org/jira/browse/AXIS2-2104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470037
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Volker Reichel commented on AXIS2-2104:
---------------------------------------
The problem goes away when "elementFormDefault" is set to "qualified" and
"attributeFormDefault" is set to "unqualified".
> StreamingOMSerializer.serializeElement cannot handle empty namespace prefix
> aka default namespace
> -------------------------------------------------------------------------------------------------
>
> Key: AXIS2-2104
> URL: https://issues.apache.org/jira/browse/AXIS2-2104
> Project: Axis 2.0 (Axis2)
> Issue Type: Bug
> Components: om
> Affects Versions: 1.1.1
> Reporter: Volker Reichel
>
> When serializing XML a default namespace will throw a NPE in method
> serializeElement().
> // Now write out the list of namespace declarations in this list that
> we constructed
> // while doing the "set" processing.
> if (writePrefixList != null) {
> for (int i=0; i<writePrefixList.size(); i++) {
> String prefix = (String) writePrefixList.get(i);
> String namespace = (String) writeNSList.get(i);
> ========> if (prefix != null) { <<<<<<<<=======
> writer.writeNamespace(prefix, namespace);
> } else {
> writer.writeDefaultNamespace(namespace);
> }
> }
> }
> Fix is easy: Replace marked section with:
> if ( ! "".equals(prefix)) {
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