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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9154) SortedMapWritable#putAll() doesn't add key/value classes to the map
Date Mon, 24 Dec 2012 18:04:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13539300#comment-13539300
] 

Karthik Kambatla commented on HADOOP-9154:
------------------------------------------

A better approach might be to add a protected {{Map}} instance to {{AbstractMapWritable}}
to be instantiated in subclasses - {{SortedMapWritable}} and {{MapWritable}}. All the methods
in {{Map}} can be implemented in the abstract class, while specific methods like {{#headMap()}}
can be implemented in subclasses.

That would let us avoid code duplication.
                
> SortedMapWritable#putAll() doesn't add key/value classes to the map
> -------------------------------------------------------------------
>
>                 Key: HADOOP-9154
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9154
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 2.0.2-alpha
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>
> In the following code from {{SortedMapWritable}}, #putAll() doesn't add key/value classes
to the class-id maps.
> {code}
>   @Override
>   public Writable put(WritableComparable key, Writable value) {
>     addToMap(key.getClass());
>     addToMap(value.getClass());
>     return instance.put(key, value);
>   }
>   @Override
>   public void putAll(Map<? extends WritableComparable, ? extends Writable> t){
>     for (Map.Entry<? extends WritableComparable, ? extends Writable> e:
>       t.entrySet()) {
>       
>       instance.put(e.getKey(), e.getValue());
>     }
>   }
> {code}

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