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https://issues.apache.org/jira/browse/LUCENE-3756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204596#comment-13204596
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Uwe Schindler commented on LUCENE-3756:
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bq. This is indicative of a larger worrying trend of people thinking of how to 
do something the best way and then trying to prohibit all other ways. It 
ultimately makes Lucene less flexible.

I strongly agree! As I said in this, in LUCENE-3736 and other issues. The 
builder pattern does not prevent anybody from *not* using it and both patterns 
can be used to make code unreadable. But I (and I speak also for other 
committers like Shai) want to have the freedom to chain my method calls if we 
have builder.

bq. Was LUCENE-3736 really reverted over this coding style? That's definitely 
not something we should make a precedent.

Yes, it was reverted because of that. I already committed and closed that 
issue, but Mike disagreed (in my opinion, he put not enough stress on his 
answer). On IRC I gave the "OK" to revert it (I wanted to be kept out of the 
whole process, so I "allowed" him to revert).

bq. Rather than let this be decided by attrition like LUCENE-2308 (freeze vs 
builder vs ???), it would seem fairer to perhaps call a straight up vote. This 
isn't a deep technical issue, but rather a style issue that most committers 
probably have an opinion on.

Yes, please!

My proposal would be (Robert als suggested that to me privately):

- Allow definition of builder patterns, but dont force users to use them
- Don't use the builders to chain in tests (unless it makes it more readable - 
it does quite often), at least format the tests like I did in 3736.
                
> Don't allow IndexWriterConfig setters to chain
> ----------------------------------------------
>
>                 Key: LUCENE-3756
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3756
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>
> Spinoff from LUCENE-3736.
> I don't like that IndexWriterConfig's setters are chainable; it
> results in code in our tests like this:
> {noformat}
> IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig( 
> TEST_VERSION_CURRENT, new 
> MockAnalyzer(random)).setMaxBufferedDocs(2).setMergePolicy(newLogMergePolicy()));
> {noformat}
> I think in general we should avoid chaining since it encourages hard
> to read code (code is already hard enough to read!).

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