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https://issues.apache.org/jira/browse/HADOOP-1204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Runping Qi updated HADOOP-1204:
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Attachment: (was: patch-1204.txt)
> Re-factor InputFormat/RecordReader related classes
> --------------------------------------------------
>
> Key: HADOOP-1204
> URL: https://issues.apache.org/jira/browse/HADOOP-1204
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Reporter: Runping Qi
> Assigned To: Runping Qi
>
> This Jira is the first small step to unify the code related to the
> inputformat/record readers for streaming
> with the Hadoop main framework.
> This Jira does a few things to clean up the related parts in the Hadoop main
> framework.
> 1. Add a constructor
> public LineRecordReader(Configuration job, FileSplit split)
> to LineRecordReader. This makes the constructors of both
> SequenceFileRecordReader and LineRecordReader
> have the same signature. This facilitates to have a factory class to create
> various record readers when
> we bring in the class readers classes for hadoop streaming to the main
> framework.
> 2. Implementded next() method using the following newly added protected
> method to LineRecordReader class:
> protected long readLine() throws IOException {
> return LineRecordReader.readLine(in, buffer);
> }
> This allows the user to easily overwrite the readLine logic to use
> different line breaker (e.g. treat '\r' as part of data, not line breaker).
> 3. Rename class InputFormatBase to FileInputFormat to better reflect the
> functionality of the class.
> To keep backward compatible, still keep InputFormatBase class, but make it
> deprecated shallow class simply inheriting FileInputFormat .
> 4. Change TextInputFormat and SequenceFileFormat to extend FileInputFormat.
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