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https://issues.apache.org/jira/browse/IO-218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denis Zhdanov updated IO-218:
-----------------------------

    Description: 
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.

  was:
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, } -> {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.


> 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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