Allow CodecFactory to return a codec object given a codec' class name
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Key: HADOOP-6996
URL: https://issues.apache.org/jira/browse/HADOOP-6996
Project: Hadoop Common
Issue Type: New Feature
Components: io
Affects Versions: 0.22.0
Reporter: Hairong Kuang
Assignee: Hairong Kuang
Fix For: 0.22.0
CodecFactory specify the list of codec that are supported by Hadoop. However,
it returns a codec only by a file's name. I would like to make getCodec method
to alternatively take a codec's class name.
This is required by HDFS-1435, where
1. it allows an HDFS admin to configure which codec to use to save an image.
2. It stores the codec class name in its on-disk image instead of a file's
suffix.
When saving and reading an image, I'd like to get an codec from CodecFactory by
its class name.
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