org.apache.giraph.io.formats

Class IntIntNullTextVertexInputFormat.IntIntNullVertexReader

java.lang.Object

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

org.apache.giraph.worker.WorkerAggregatorDelegator<I,V,E>

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

org.apache.giraph.io.formats.TextVertexInputFormat.TextVertexReader

org.apache.giraph.io.formats.TextVertexInputFormat.TextVertexReaderFromEachLineProcessed<String[]>

org.apache.giraph.io.formats.IntIntNullTextVertexInputFormat.IntIntNullVertexReader

All Implemented Interfaces:

AggregatorUsage, GiraphConfigurationSettable<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable>, ImmutableClassesGiraphConfigurable<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable>, WorkerAggregatorUsage, WorkerBroadcastUsage, WorkerGlobalCommUsage, WorkerReduceUsage

Enclosing class:

IntIntNullTextVertexInputFormat

public class IntIntNullTextVertexInputFormat.IntIntNullVertexReader
extends TextVertexInputFormat.TextVertexReaderFromEachLineProcessed<String[]>

Vertex reader associated with IntIntNullTextVertexInputFormat.

Constructor Summary

Constructors

Constructor and Description
IntIntNullVertexReader()

Method Summary

Modifier and Type	Method and Description
protected Iterable<Edge<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable>>	getEdges(String[] tokens) Reads edges from the preprocessed line.
protected org.apache.hadoop.io.IntWritable	getId(String[] tokens) Reads vertex id from the preprocessed line.
protected org.apache.hadoop.io.IntWritable	getValue(String[] tokens) Reads vertex value from the preprocessed line.
protected String[]	preprocessLine(org.apache.hadoop.io.Text line) Preprocess the line so other methods can easily read necessary information for creating vertex.

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

getCurrentVertex, nextVertex

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

close, createLineRecordReader, getContext, getProgress, getRecordReader, initialize

Methods inherited from class org.apache.giraph.worker.WorkerAggregatorDelegator

aggregate, getAggregatedValue, getBroadcast, reduce, reduceMerge, setWorkerGlobalCommUsage

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

IntIntNullVertexReader

public IntIntNullVertexReader()

Method Detail

preprocessLine

protected String[] preprocessLine(org.apache.hadoop.io.Text line)
                           throws IOException

Description copied from class: TextVertexInputFormat.TextVertexReaderFromEachLineProcessed

Preprocess the line so other methods can easily read necessary information for creating vertex.

Specified by:

preprocessLine in class TextVertexInputFormat.TextVertexReaderFromEachLineProcessed<String[]>

Parameters:

line - the current line to be read

Returns:

the preprocessed object

Throws:

IOException - exception that can be thrown while reading

getId

protected org.apache.hadoop.io.IntWritable getId(String[] tokens)
                                          throws IOException

Description copied from class: TextVertexInputFormat.TextVertexReaderFromEachLineProcessed

Reads vertex id from the preprocessed line.

Specified by:

getId in class TextVertexInputFormat.TextVertexReaderFromEachLineProcessed<String[]>

Parameters:

tokens - the object obtained by preprocessing the line

Returns:

the vertex id

Throws:

IOException - exception that can be thrown while reading

getValue

protected org.apache.hadoop.io.IntWritable getValue(String[] tokens)
                                             throws IOException

Description copied from class: TextVertexInputFormat.TextVertexReaderFromEachLineProcessed

Reads vertex value from the preprocessed line.

Specified by:

getValue in class TextVertexInputFormat.TextVertexReaderFromEachLineProcessed<String[]>

Parameters:

tokens - the object obtained by preprocessing the line

Returns:

the vertex value

Throws:

IOException - exception that can be thrown while reading

getEdges

protected Iterable<Edge<org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.NullWritable>> getEdges(String[] tokens)
                                                                                               throws IOException

Description copied from class: TextVertexInputFormat.TextVertexReaderFromEachLineProcessed

Reads edges from the preprocessed line.

Specified by:

getEdges in class TextVertexInputFormat.TextVertexReaderFromEachLineProcessed<String[]>

Parameters:

tokens - the object obtained by preprocessing the line

Returns:

the edges

Throws:

IOException - exception that can be thrown while reading