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https://issues.apache.org/jira/browse/COLLECTIONS-443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13585451#comment-13585451
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Thomas Neidhart commented on COLLECTIONS-443:
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Hi Vitaly,
thanks for your contribution. Unfortunately the code hosted on the link you
provided is released under GPL, which is not compatible with Apache license.
To include it into commons-collections it would be necessary that you attach
the code in question to this issue and all source files with an Apache license
header, or you update the license on the project hosted at googlecode.
Looking at the source itself, it looks like you did start your work from the
original Sun/Oracle code, which will make this even more complicated.
Thomas
> Proposal for adding IndexedTreeMap to collections
> -------------------------------------------------
>
> Key: COLLECTIONS-443
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-443
> Project: Commons Collections
> Issue Type: Improvement
> Reporter: Vitaly Sazanovich
> Priority: Minor
> Fix For: 4.x
>
>
> Dear developers,
> I have written a small enhancement to JDK's TreeMap that allows to find and
> retrieve entries by index. The project can be found here:
> http://code.google.com/p/indexed-tree-map/
> This is a very requested feature, at least on stackoverflow:
> http://stackoverflow.com/search?q=treemap+index
> I though it would be nice and useful if my implementation becomes part of
> Apache collections. Also I could maintain these implementations in the future.
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