Thomas Goettlich created WW-4182:
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Summary: 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
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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