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java.lang.Objectorg.apache.hadoop.io.compress.CompressionCodecFactory
public class CompressionCodecFactory
A factory that will find the correct codec for a given filename.
| Field Summary | |
|---|---|
static org.apache.commons.logging.Log |
LOG
|
| Constructor Summary | |
|---|---|
CompressionCodecFactory(Configuration conf)
Find the codecs specified in the config value io.compression.codecs and register them. |
|
| Method Summary | |
|---|---|
CompressionCodec |
getCodec(Path file)
Find the relevant compression codec for the given file based on its filename suffix. |
CompressionCodec |
getCodecByClassName(String classname)
Find the relevant compression codec for the codec's canonical class name. |
CompressionCodec |
getCodecByName(String codecName)
Find the relevant compression codec for the codec's canonical class name or by codec alias. |
Class<? extends CompressionCodec> |
getCodecClassByName(String codecName)
Find the relevant compression codec for the codec's canonical class name or by codec alias and returns its implemetation class. |
static List<Class<? extends CompressionCodec>> |
getCodecClasses(Configuration conf)
Get the list of codecs listed in the configuration |
static void |
main(String[] args)
A little test program. |
static String |
removeSuffix(String filename,
String suffix)
Removes a suffix from a filename, if it has it. |
static void |
setCodecClasses(Configuration conf,
List<Class> classes)
Sets a list of codec classes in the configuration. |
String |
toString()
Print the extension map out as a string. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Field Detail |
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public static final org.apache.commons.logging.Log LOG
| Constructor Detail |
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public CompressionCodecFactory(Configuration conf)
| Method Detail |
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public String toString()
toString in class Objectpublic static List<Class<? extends CompressionCodec>> getCodecClasses(Configuration conf)
conf - the configuration to look in
public static void setCodecClasses(Configuration conf,
List<Class> classes)
conf - the configuration to modifyclasses - the list of classes to setpublic CompressionCodec getCodec(Path file)
file - the filename to check
public CompressionCodec getCodecByClassName(String classname)
classname - the canonical class name of the codec
public CompressionCodec getCodecByName(String codecName)
codecName - the canonical class name of the codec
public Class<? extends CompressionCodec> getCodecClassByName(String codecName)
codecName - the canonical class name of the codec
public static String removeSuffix(String filename,
String suffix)
filename - the filename to stripsuffix - the suffix to remove
public static void main(String[] args)
throws Exception
args -
Exception
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