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https://issues.apache.org/jira/browse/LUCENE-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12725447#action_12725447
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David Smiley commented on LUCENE-1653:
--------------------------------------
I'm looking through DateTools now and can't help but want to clean it up some.
One thing I see that is odd is the use of a Calendar in
timeToString(long,resolution). The first two lines look like this right now:
{code}
calInstance.setTimeInMillis(round(time, resolution));
Date date = calInstance.getTime();
{code}
Instead, it can simply be:
{code}
Date date = new Date(round(time, resolution));
{code}.
Secondly... I think a good deal of logic can be cleaned up in the other methods
instead of a bunch of if-else statements that is a bad code smell. Most of the
logic of 3 of those methods could be put into Resolution and be made tighter.
> Change DateTools to not create a Calendar in every call to dateToString or
> timeToString
> ---------------------------------------------------------------------------------------
>
> Key: LUCENE-1653
> URL: https://issues.apache.org/jira/browse/LUCENE-1653
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Other
> Reporter: Shai Erera
> Assignee: Mark Miller
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1653.patch, LUCENE-1653.patch
>
>
> DateTools creates a Calendar instance on every call to dateToString and
> timeToString. Specifically:
> # timeToString calls Calendar.getInstance on every call.
> # dateToString calls timeToString(date.getTime()), which then instantiates a
> new Date(). I think we should change the order of the calls, or not have each
> call the other.
> # round(), which is called from timeToString (after creating a Calendar
> instance) creates another (!) Calendar instance ...
> Seems that if we synchronize the methods and create the Calendar instance
> once (static), it should solve it.
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