eu.stratosphere.example.java.record.triangles

Class EnumTrianglesRdfFoaf.EdgeInFormat

java.lang.Object

eu.stratosphere.api.common.io.FileInputFormat<OT>

eu.stratosphere.api.common.io.DelimitedInputFormat<Record>

eu.stratosphere.api.java.record.io.DelimitedInputFormat

eu.stratosphere.example.java.record.triangles.EnumTrianglesRdfFoaf.EdgeInFormat

All Implemented Interfaces:

InputFormat<Record,FileInputSplit>, Serializable

Enclosing class:

EnumTrianglesRdfFoaf

public static class EnumTrianglesRdfFoaf.EdgeInFormat
extends DelimitedInputFormat

Reads RDF triples and filters on the foaf:knows RDF predicate. The foaf:knows RDF predicate indicates that the RDF subject and object (typically of type foaf:person) know each other. Therefore, knowing connections between people are extracted and handles as graph edges. The EdgeInFormat filters all rdf triples with foaf:knows predicates. The subjects and objects URLs are compared. The lexicographically smaller URL is set as the first field of the output record, the greater one as the second field.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class eu.stratosphere.api.common.io.DelimitedInputFormat

DelimitedInputFormat.AbstractConfigBuilder<T>, DelimitedInputFormat.ConfigBuilder

Nested classes/interfaces inherited from class eu.stratosphere.api.common.io.FileInputFormat

FileInputFormat.FileBaseStatistics, FileInputFormat.InputSplitOpenThread

Field Summary

Fields inherited from class eu.stratosphere.api.common.io.DelimitedInputFormat

RECORD_DELIMITER

Fields inherited from class eu.stratosphere.api.common.io.FileInputFormat

filePath, minSplitSize, numSplits, openTimeout, splitLength, splitStart, stream

Constructor Summary

Constructors

Constructor and Description
EnumTrianglesRdfFoaf.EdgeInFormat()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	readRecord(Record target, byte[] bytes, int offset, int numBytes)

Methods inherited from class eu.stratosphere.api.common.io.DelimitedInputFormat

close, configure, configureDelimitedFormat, getBufferSize, getDelimiter, getLineLengthLimit, getNumLineSamples, getStatistics, loadGloablConfigParams, nextRecord, open, reachedEnd, setBufferSize, setDelimiter, setDelimiter, setDelimiter, setDelimiter, setDelimiter, setLineLengthLimit, setNumLineSamples

Methods inherited from class eu.stratosphere.api.common.io.FileInputFormat

configureFileFormat, createInputSplits, getFilePath, getFileStats, getInputSplitType, getMinSplitSize, getNumSplits, getOpenTimeout, getSplitLength, getSplitStart, setFilePath, setFilePath, setMinSplitSize, setNumSplits, setOpenTimeout, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

EnumTrianglesRdfFoaf.EdgeInFormat

public EnumTrianglesRdfFoaf.EdgeInFormat()

Method Detail

readRecord

public boolean readRecord(Record target,
                 byte[] bytes,
                 int offset,
                 int numBytes)

Specified by:

readRecord in class DelimitedInputFormat