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From Stephan Windmüller (JIRA) <j...@apache.org>
Subject [jira] [Commented] (COLLECTIONS-694) Support for Transformer in LazyList
Date Sun, 09 Sep 2018 09:57:00 GMT

    [ https://issues.apache.org/jira/browse/COLLECTIONS-694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16608403#comment-16608403
] 

Stephan Windmüller commented on COLLECTIONS-694:
------------------------------------------------

Pull request added on GitHub: https://github.com/apache/commons-collections/pull/52

> Support for Transformer in LazyList
> -----------------------------------
>
>                 Key: COLLECTIONS-694
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-694
>             Project: Commons Collections
>          Issue Type: Improvement
>          Components: List
>    Affects Versions: 4.2
>            Reporter: Stephan Windmüller
>            Priority: Minor
>
> {{LazyList}} supports a {{Factory}} for creating new elements on first access. Since
a {{Factory}} does not take any arguments, those elements can not depend on any input values.
> A possible use case is a list of objects from a database, fetched by their id. If an
element at a specific position is requested, it is retrieved from the database lazily. This
would require support of a {{Transformer}} (from id to database object).



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