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https://issues.apache.org/jira/browse/LUCENE-4126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13292335#comment-13292335
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Robert Muir commented on LUCENE-4126:
-------------------------------------
Lets play out a few typical realistic scenarios that are not too expert:
1. user has a text field and wants to enable term vectors (so they can use
highlighting/MLT)
2. user has a string field and wants to enable norms (so they can use
index-time boosting)
what does the before/after picture look like here? Is it easier? Is it trappy?
> Remove FieldType copy constructor
> ---------------------------------
>
> Key: LUCENE-4126
> URL: https://issues.apache.org/jira/browse/LUCENE-4126
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Chris Male
> Fix For: 4.0, 5.0
>
>
> Currently FieldTypes can be created using new FieldType(someOtherFieldType)
> which copies the properties and allows them to then changed. This reduces
> readability since it hides what properties someOtherFieldType has enabled.
> We should encourage users (and ourselves) to explicitly state what properties
> are enabled so to prevent any surprises.
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