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https://issues.apache.org/jira/browse/WW-4831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16108983#comment-16108983
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Hudson commented on WW-4831:
----------------------------
SUCCESS: Integrated in Jenkins build Struts-master-JDK7 #12 (See
[https://builds.apache.org/job/Struts-master-JDK7/12/])
[WW-4831] convert nulls within arrays to empty strings rather than the 4
(shell_layer-github: rev 8cc56b2974e5c744954b110e645f61f18e0b12ab)
* (edit)
core/src/main/java/com/opensymphony/xwork2/conversion/impl/StringConverter.java
[WW-4831] add unit tests for conversion of String arrays (shell_layer-github:
rev 60d61fac0abb5993977e84f8dcc5bea6588f41d6)
* (edit)
core/src/test/java/com/opensymphony/xwork2/conversion/impl/StringConverterTest.java
> Array-of-null parameters are converted to arrays containing "null"
> ------------------------------------------------------------------
>
> Key: WW-4831
> URL: https://issues.apache.org/jira/browse/WW-4831
> Project: Struts 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.5.12
> Reporter: Mitth'raw'nuruodo
> Assignee: Lukasz Lenart
> Fix For: 2.5.13
>
>
> The {{com.opensymphony.xwork2.conversion.impl.StringConverter}} class, since
> Struts 2.5.11, incorrectly handles arrays containing null; it converts them
> to arrays containing the string "null" (using {{String.valueOf}}).
> This is breaking one of our applications; some pages are OK, but on other
> pages, every non-provided field is populated with the String "null".
> This is a similar issue to WW-4737, but occurring in different code.
> Please ensure that conversion to String always uses the two-argument version
> of {{Objects.toString}}, which preserves nulls, rather than
> {{String.valueOf}}, which converts them to the four-letter string "null".
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