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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HADOOP-17152) Implement wrapper for guava newArrayList and newLinkedList
Date Tue, 01 Jun 2021 10:29:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-17152?focusedWorklogId=604427&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-604427
]

ASF GitHub Bot logged work on HADOOP-17152:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Jun/21 10:28
            Start Date: 01/Jun/21 10:28
    Worklog Time Spent: 10m 
      Work Description: virajjasani commented on pull request #3061:
URL: https://github.com/apache/hadoop/pull/3061#issuecomment-852014244


   Thanks for the review @bogthe. I understand about providing comments for immutable alternatives
but specifically in the case of `List`, Hadoop does not require any. I have checked code in
all modules and hence decided to remove info about immutable lists in comments.


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 604427)
    Time Spent: 0.5h  (was: 20m)

> Implement wrapper for guava newArrayList and newLinkedList
> ----------------------------------------------------------
>
>                 Key: HADOOP-17152
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17152
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: common
>            Reporter: Ahmed Hussein
>            Assignee: Viraj Jasani
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> guava Lists class provide some wrappers to java ArrayList and LinkedList.
> Replacing the method calls throughout the code can be invasive because guava offers some
APIs that do not exist in java util. This Jira is the task of implementing those missing APIs
in hadoop common in a step toward getting rid of guava.
>  * create a wrapper class org.apache.hadoop.util.unguava.ListsĀ 
>  * implement the following interfaces in Lists:
>  ** public static <E> ArrayList<E> newArrayList()
>  ** public static <E> ArrayList<E> newArrayList(E... elements)
>  ** public static <E> ArrayList<E> newArrayList(Iterable<? extends E>
elements)
>  ** public static <E> ArrayList<E> newArrayList(Iterator<? extends E>
elements)
>  ** public static <E> ArrayList<E> newArrayListWithCapacity(int initialArraySize)
>  ** public static <E> LinkedList<E> newLinkedList()
>  ** public static <E> LinkedList<E> newLinkedList(Iterable<? extends E>
elements)
>  ** public static <E> List<E> asList(@Nullable E first, E[] rest)



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