org.apache.giraph.io.formats

Class IntNullNullTextInputFormat

java.lang.Object

org.apache.giraph.conf.DefaultImmutableClassesGiraphConfigurable<I,V,E>

org.apache.giraph.io.GiraphInputFormat<I,V,E>

org.apache.giraph.io.VertexInputFormat<I,V,E>

org.apache.giraph.io.formats.TextVertexInputFormat<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>

org.apache.giraph.io.formats.IntNullNullTextInputFormat

All Implemented Interfaces:

GiraphConfigurationSettable<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>, ImmutableClassesGiraphConfigurable<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>

public class IntNullNullTextInputFormat
extends TextVertexInputFormat<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>

Simple text-based VertexInputFormat for unweighted graphs without edges or values, just vertices with ids. Each line is just simply the vertex id.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	IntNullNullTextInputFormat.IntNullNullNullVertexReader Reader for this InputFormat.

Nested classes/interfaces inherited from class org.apache.giraph.io.formats.TextVertexInputFormat

TextVertexInputFormat.TextVertexReader, TextVertexInputFormat.TextVertexReaderFromEachLine, TextVertexInputFormat.TextVertexReaderFromEachLineProcessed<T>, TextVertexInputFormat.TextVertexReaderFromEachLineProcessedHandlingExceptions<T,X extends Throwable>

Field Summary

Fields inherited from class org.apache.giraph.io.formats.TextVertexInputFormat

textInputFormat

Constructor Summary

Constructors

Constructor and Description
IntNullNullTextInputFormat()

Method Summary

Modifier and Type	Method and Description
TextVertexInputFormat.TextVertexReader	createVertexReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context) The factory method which produces the TextVertexInputFormat.TextVertexReader used by this input format.

Methods inherited from class org.apache.giraph.io.formats.TextVertexInputFormat

checkInputSpecs, getSplits

Methods inherited from class org.apache.giraph.io.GiraphInputFormat

readInputSplit, writeInputSplit

Methods inherited from class org.apache.giraph.conf.DefaultImmutableClassesGiraphConfigurable

getConf, setConf

Methods inherited from class java.lang.Object

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

Constructor Detail

IntNullNullTextInputFormat

public IntNullNullTextInputFormat()

Method Detail

createVertexReader

public TextVertexInputFormat.TextVertexReader createVertexReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                 org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                          throws IOException

Description copied from class: TextVertexInputFormat

The factory method which produces the TextVertexInputFormat.TextVertexReader used by this input format.

Specified by:

createVertexReader in class TextVertexInputFormat<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>

Parameters:

split - the split to be read

context - the information about the task

Returns:

the text vertex reader to be used

Throws:

IOException