DO NOT REPLY [Bug 36061] New: - ToStringBuilder throws StackOverflowError when an Object cycle exists

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http://issues.apache.org/bugzilla/show_bug.cgi?id=36061

           Summary: ToStringBuilder throws StackOverflowError when an Object
                    cycle exists
           Product: Commons
           Version: 2.1 Final
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Lang
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: maarten.coene@hotpop.com


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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