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From "Denis Zhdanov (JIRA)" <j...@apache.org>
Subject [jira] Commented: (IO-218) Introduce new filter input stream with replacement facilities
Date Wed, 16 Sep 2009 06:45:57 GMT

    [ https://issues.apache.org/jira/browse/IO-218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755906#action_12755906
] 

Denis Zhdanov commented on IO-218:
----------------------------------

New files are reattached.

> Introduce new filter input stream with replacement facilities
> -------------------------------------------------------------
>
>                 Key: IO-218
>                 URL: https://issues.apache.org/jira/browse/IO-218
>             Project: Commons IO
>          Issue Type: Improvement
>          Components: Filters
>    Affects Versions: 1.4
>         Environment: all environments
>            Reporter: Denis Zhdanov
>             Fix For: 1.4, 2.0
>
>         Attachments: ReplaceFilterInputStream.java, ReplaceFilterInputStreamTest.java
>
>   Original Estimate: 120h
>  Remaining Estimate: 120h
>
> It seems convenient to have a FilterInputStream that allows to apply predefined repalcement
rules against the read data. 
> For example we may want to configure the following replacements:
> {noformat}
> {1, 2} -> {7, 8}
> {1} -> {9}
> {3, 2} -> {}
> {noformat}
> and apply them to the input like
> {noformat}
> {4, 3, 2, 1, 2, 1, 3}
> {noformat}
> in order to get a result like
> {noformat}
> {4, 7, 8, 9, 3}
> {noformat}
> I created the class that allows to do that and attached it to this ticket. Unit test
class at junit4 format is attached as well.
> So, the task is to review the provided classes, consider if it's worth to add them to
commons-io distribution and perform the inclusion in the case of possible result.

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