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https://issues.apache.org/jira/browse/LANG-637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461497#comment-13461497
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Matt Benson commented on LANG-637:
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The direction looks promising. I think it would be nice to have an actual
datatype returned from the {{DifferenceBuilder}} offloading the string-building
stuff to _its_ {{#toString()}} implementation. This way a client could use the
e.g. {{Difference}} object in ways other than simply rendering as text.
> There should be a DifferenceBuilder with a ReflectionDifferenceBuilder
> implementation
> -------------------------------------------------------------------------------------
>
> Key: LANG-637
> URL: https://issues.apache.org/jira/browse/LANG-637
> Project: Commons Lang
> Issue Type: Improvement
> Components: lang.builder.*
> Reporter: Eric Lewis
> Priority: Minor
> Fix For: 3.x
>
> Attachments: DifferenceBuilder.java, DifferenceBuilderTest.java,
> Differentiable.java
>
>
> The ToStringBuilder and ReflectionToStringBuilder are great tools for
> everyday development.
> We use them to show all the properties in an object, which comes handy
> especially for testing.
> However, JUnit with its assertEquals() just outputs the toString() of the two
> compared objects. For complex objects, this becomes unreadable.
> So, it would be great to have a DifferenceBuilder with a
> ReflectionDifferenceBuilder implementation to be able to get only the
> differing properties of two objects. The question is whether the two objects
> would have to be of the same type or not.
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