Package org.apache.giraph.io.formats

Class TextVertexInputFormat.TextVertexReaderFromEachLine

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.TextVertexReaderFromEachLine

All Implemented Interfaces:

org.apache.giraph.aggregators.AggregatorUsage, org.apache.giraph.conf.GiraphConfigurationSettable<I,V,E>, org.apache.giraph.conf.ImmutableClassesGiraphConfigurable<I,V,E>, org.apache.giraph.worker.WorkerAggregatorUsage, org.apache.giraph.worker.WorkerBroadcastUsage, org.apache.giraph.worker.WorkerGlobalCommUsage, org.apache.giraph.worker.WorkerReduceUsage

Enclosing class:

TextVertexInputFormat<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

protected abstract class TextVertexInputFormat.TextVertexReaderFromEachLine
extends TextVertexInputFormat.TextVertexReader

Abstract class to be implemented by the user to read a vertex from each text line.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TextVertexReaderFromEachLine()

Method Summary

Modifier and Type	Method	Description
org.apache.giraph.graph.Vertex<I,V,E>	getCurrentVertex()
protected abstract Iterable<org.apache.giraph.edge.Edge<I,E>>	getEdges(org.apache.hadoop.io.Text line)	Reads edges value from the current line.
protected abstract I	getId(org.apache.hadoop.io.Text line)	Reads vertex id from the current line.
protected abstract V	getValue(org.apache.hadoop.io.Text line)	Reads vertex value from the current line.
boolean	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, setAggregatorManager

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

TextVertexReaderFromEachLine

protected TextVertexReaderFromEachLine()

Method Detail

getCurrentVertex

public final org.apache.giraph.graph.Vertex<I,V,E> getCurrentVertex()
                                                                         throws IOException,
                                                                                InterruptedException

Specified by:

getCurrentVertex in class org.apache.giraph.io.VertexReader<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Throws:

IOException

InterruptedException

nextVertex

public final boolean nextVertex()
                         throws IOException,
                                InterruptedException

Specified by:

nextVertex in class org.apache.giraph.io.VertexReader<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Throws:

IOException

InterruptedException

getId

protected abstract I getId(org.apache.hadoop.io.Text line)
                    throws IOException

Reads vertex id from the current line.

Parameters:

line - the current line

Returns:

the vertex id corresponding to the line

Throws:

IOException - exception that can be thrown while reading

getValue

protected abstract V getValue(org.apache.hadoop.io.Text line)
                       throws IOException

Reads vertex value from the current line.

Parameters:

line - the current line

Returns:

the vertex value corresponding to the line

Throws:

IOException - exception that can be thrown while reading

getEdges

protected abstract Iterable<org.apache.giraph.edge.Edge<I,E>> getEdges(org.apache.hadoop.io.Text line)
                                                                      throws IOException

Reads edges value from the current line.

Parameters:

line - the current line

Returns:

the edges

Throws:

IOException - exception that can be thrown while reading