[jira] [Commented] (LANG-637) There should be a DifferenceBuilder with a ReflectionDifferenceBuilder implementation

["Matt Benson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LANG-637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13854469#comment-13854469 ] 

Matt Benson commented on LANG-637:
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Hi, Duncan.  After more than a year, I have now reviewed this.  I personally would like to see DiffList implement List<Diff<?>>, and then I would personally be in favor of committing this code.  As long as it has been, I can understand if you've moved on and don't have time to make this change, in which case I can do it.

> 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: Review Patch
>
>         Attachments: Diff.java, DiffBuilder.java, DiffBuilderTest.java, DiffList.java, DiffListTest.java, DiffTest.java, Diffable.java, commons-lang3-LANG-637-complete.patch, commons-lang3-LANG-637.patch
>
>
> 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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