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HADOOP-8395. Text shell command unnecessarily demands that a SequenceFile's key class be WritableComparable (harsh) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1337449 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Harsh J 2012-05-12 06:03:39 +00:00
parent 3d18382285
commit 810ae618fd
2 changed files with 5 additions and 3 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -133,6 +133,9 @@ Trunk (unreleased changes)
HADOOP-8375. test-patch should stop immediately once it has found
compilation errors (bobby)
HADOOP-8395. Text shell command unnecessarily demands that a
SequenceFile's key class be WritableComparable (harsh)
OPTIMIZATIONS
HADOOP-7761. Improve the performance of raw comparisons. (todd)

5
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/Display.java
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@ -34,7 +34,6 @@ import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.CompressionCodecFactory;
import org.apache.hadoop.util.ReflectionUtils;
@ -136,7 +135,7 @@ class Display extends FsCommand {
protected class TextRecordInputStream extends InputStream {
SequenceFile.Reader r;
WritableComparable<?> key;
Writable key;
Writable val;
DataInputBuffer inbuf;
@ -148,7 +147,7 @@ class Display extends FsCommand {
r = new SequenceFile.Reader(lconf,
SequenceFile.Reader.file(fpath));
key = ReflectionUtils.newInstance(
r.getKeyClass().asSubclass(WritableComparable.class), lconf);
r.getKeyClass().asSubclass(Writable.class), lconf);
val = ReflectionUtils.newInstance(
r.getValueClass().asSubclass(Writable.class), lconf);
inbuf = new DataInputBuffer();