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Date: Fri, 29 Sep 2006 12:57:21 -0700 (PDT)
From: "Gary Gregory (JIRA)" <jira@apache.org>
To: commons-dev@jakarta.apache.org
Subject: [jira] Commented: (LANG-69) [lang] ToStringBuilder throws
 StackOverflowError when an Object cycle exists
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    [ http://issues.apache.org/jira/browse/LANG-69?page=comments#action_12438787 ] 
            
Gary Gregory commented on LANG-69:
----------------------------------

Fix already in CVS. 
Please see HashCodeBuilderTest#testReflectionObjectCycle().

> [lang] ToStringBuilder throws StackOverflowError when an Object cycle exists
> ----------------------------------------------------------------------------
>
>                 Key: LANG-69
>                 URL: http://issues.apache.org/jira/browse/LANG-69
>             Project: Commons Lang
>          Issue Type: Bug
>    Affects Versions: 2.1
>         Environment: Operating System: other
> Platform: Other
>            Reporter: Maarten Coene
>         Assigned To: Gary Gregory
>             Fix For: 2.3
>
>         Attachments: 15938.patch, 36061.patch, ReflectionToStringBuilder.java.patch, ToStringBuilderTest.java.patch, ToStringStyle.java.patch
>
>
> Hi,
> The ToStringBuilder throws a StackOverflowError if you have a cycle in the
> object graph. For instance, the following toString() method will cause a
> StackOverflowError:
> public class ObjectCycle {
>     Object obj;
>     	
>     public String toString() {
>         return new ToStringBuilder(this).append(obj).toString();
>     }
> }
> public void testObjectCycle() {
>     ObjectCycle a = new ObjectCycle();
>     ObjectCycle b = new ObjectCycle();
>     a.obj = b;
>     b.obj = a;
>     a.toString();  // ouch: StackOverflowError    	
> }
> I'll submit some patches that fixes this problem...
> regards,
> Maarten

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