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From "Brian Egge (JIRA)" <>
Subject [jira] Commented: (CLI-21) [cli] clone method in Option should use super.clone()
Date Sat, 16 Jun 2007 07:20:26 GMT


Brian Egge commented on CLI-21:

I think clearing the values would generally be useful, but I think copying them follows the
principle of least surprise.  I think we should update the JavaDoc to recommend calling clearValues.

> [cli] clone method in Option should use super.clone()
> -----------------------------------------------------
>                 Key: CLI-21
>                 URL:
>             Project: Commons CLI
>          Issue Type: Bug
>          Components: CLI-1.x
>    Affects Versions: 1.0
>         Environment: Operating System: other
> Platform: Other
>            Reporter: Nathan McDonald
>             Fix For: 1.1
>         Attachments: bug21.patch
> In
> org.apache.commons.cli.Option
> public method clone is implemented by creating a new instance through one of 
> the class Constructors, and then assigning values as required through the 
> setter methods.
> This means that any subclasses of the Option class will not return a true 
> clone, but a new Option instance instead.
> A proper implementation of clone should use super.clone() to create a new 
> instance, rather than calling the class constructor.  This allows shallows 
> clones to propogate correctly down to subclasses.

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