[jira] [Updated] (WW-4182) NullPointerException in DefaultUrlHelper

["Thomas Goettlich (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/WW-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Goettlich updated WW-4182:
---------------------------------

    Summary: NullPointerException in DefaultUrlHelper  (was: NullpointerException in DefaultUrlHelper)
    
> 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
>   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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