org.apache.hadoop.mapreduce.lib.input

Class SequenceFileAsTextInputFormat

java.lang.Object

org.apache.hadoop.mapreduce.InputFormat<K,V>

org.apache.hadoop.mapreduce.lib.input.FileInputFormat<K,V>

org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat<Text,Text>

org.apache.hadoop.mapreduce.lib.input.SequenceFileAsTextInputFormat

@InterfaceAudience.Public
@InterfaceStability.Stable
public class SequenceFileAsTextInputFormat
extends SequenceFileInputFormat<Text,Text>

This class is similar to SequenceFileInputFormat, except it generates SequenceFileAsTextRecordReader which converts the input keys and values to their String forms by calling toString() method.

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

DEFAULT_LIST_STATUS_NUM_THREADS, INPUT_DIR, INPUT_DIR_RECURSIVE, LIST_STATUS_NUM_THREADS, NUM_INPUT_FILES, PATHFILTER_CLASS, SPLIT_MAXSIZE, SPLIT_MINSIZE

Constructor Summary

Constructors

Constructor and Description
SequenceFileAsTextInputFormat()

Method Summary

Methods

Modifier and Type	Method and Description
RecordReader<Text,Text>	createRecordReader(InputSplit split, TaskAttemptContext context) Create a record reader for a given split.

Methods inherited from class org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat

getFormatMinSplitSize, listStatus

Methods inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getInputDirRecursive, getInputPathFilter, getInputPaths, getMaxSplitSize, getMinSplitSize, getSplits, isSplitable, makeSplit, makeSplit, setInputDirRecursive, setInputPathFilter, setInputPaths, setInputPaths, setMaxInputSplitSize, setMinInputSplitSize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SequenceFileAsTextInputFormat

public SequenceFileAsTextInputFormat()

Method Detail

createRecordReader

public RecordReader<Text,Text> createRecordReader(InputSplit split,
                                         TaskAttemptContext context)
                                           throws IOException

Description copied from class: InputFormat

Create a record reader for a given split. The framework will call RecordReader.initialize(InputSplit, TaskAttemptContext) before the split is used.

Overrides:

createRecordReader in class SequenceFileInputFormat<Text,Text>

Parameters:

split - the split to be read

context - the information about the task

Returns:

a new record reader

Throws:

IOException