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https://issues.apache.org/jira/browse/LUCENE-4659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544103#comment-13544103
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Gilad Barkai commented on LUCENE-4659:
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I think I wished for CP to become immutable as one of my birthday wishes (while
taking out the candles).. these do come true!
That's a very promising start, way to go!
CP's internals of char[] was for performance and reusability, I thought it was
used internally in the CL2O cache - but now I see that it does not? hmm..
Other methods which could be killed, and are in the way of immutability:
{{.setFromSerializable()}} and {{.add()}} which are only used in tests.
Than, the only method which breaks immutability is {{.trim()}}, and it could be
managed with a C'tor.
> Cleanup CategoryPath
> --------------------
>
> Key: LUCENE-4659
> URL: https://issues.apache.org/jira/browse/LUCENE-4659
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: LUCENE-4659.patch
>
>
> CategoryPath is supposed to be a simple object which holds a category path's
> components, and offers some utility methods that can be used during indexing
> and search.
> Currently, it exposes lots of methods which aren't used, unless by tests - I
> want to get rid of them. Also, the internal implementation manages 3 char[]
> for holding the path components, while I think it would have been simpler if
> it maintained a String[]. I'd like to explore that option too (the input is
> anyway String, so why copy char[]?).
> Ultimately, I'd like CategoryPath to be immutable. I was able to get rid most
> of the mutable methods. The ones that remain will probably go away when I
> move from char[] to String[]. Immuntability is important because in various
> places in the code we convert a CategoryPath back and forth to String, with
> TODOs to stop doing that if CP was immutable.
> Will attach a patch that covers the first step - get rid of unneeded methods
> and beginning to make it immutable.
> Perhaps this can be done in multiple commits?
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