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https://issues.apache.org/jira/browse/WW-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13799176#comment-13799176
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Hudson commented on WW-4182:
----------------------------
SUCCESS: Integrated in Struts2-JDK6 #814 (See
[https://builds.apache.org/job/Struts2-JDK6/814/])
WW-4182 Adds additional check to avoid NPE (lukaszlenart: rev 1533346)
*
/struts/struts2/trunk/core/src/main/java/org/apache/struts2/views/util/DefaultUrlHelper.java
> NullPointerException in DefaultUrlHelper
> ----------------------------------------
>
> Key: WW-4182
> URL: https://issues.apache.org/jira/browse/WW-4182
> Project: Struts 2
> Issue Type: Bug
> Components: Core Actions
> Affects Versions: 2.3.15.1
> Reporter: Thomas Goettlich
> Assignee: Lukasz Lenart
> Fix For: 2.3.16
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> In the method ??DefaultUrlHelper.buildParametersString(...)?? a
> NullPointerException occurs whenever an array or iterable parameter
> containing null elements is passed.
> The problem seems to be lines 214 and 244, which look the same:
> {code}
> link.append(buildParameterSubstring(name, paramValue.toString()));
> {code}
> For null parameters an empty string is written to the url:
> {code}
> value != null ? value.toString() : StringUtils.EMPTY
> {code}
> A fix would be to check ??paramValue?? for null as well, thus allowing arrays
> or iterables to contain null elements.
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