org.apache.jena.hadoop.rdf.io.output

Class TriplesOrQuadsOutputFormat<TKey>

java.lang.Object

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

org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<TKey,T>

org.apache.jena.hadoop.rdf.io.output.AbstractNodeTupleOutputFormat<TKey,Quad,QuadWritable>

org.apache.jena.hadoop.rdf.io.output.TriplesOrQuadsOutputFormat<TKey>

Type Parameters:

TKey - Key type

public abstract class TriplesOrQuadsOutputFormat<TKey>
extends AbstractNodeTupleOutputFormat<TKey,Quad,QuadWritable>

An output format for RDF triples/quads that dynamically selects the appropriate triple/quad writer to use based on the file extension of the output file.

For example this is useful when the output format may be controlled by a user supplied filename i.e. the desired RDF output format is not precisely known in advance.

Warning

Where the format is determined to be triples the quads are converted into triples are thus will lose any graph information that might be carried.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

COMPRESS, COMPRESS_CODEC, COMPRESS_TYPE, OUTDIR

Constructor Summary

Constructors

Constructor and Description
TriplesOrQuadsOutputFormat()

Method Summary

Methods inherited from class org.apache.jena.hadoop.rdf.io.output.AbstractNodeTupleOutputFormat

getRecordWriter

Methods inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

checkOutputSpecs, getCompressOutput, getDefaultWorkFile, getOutputCommitter, getOutputCompressorClass, getOutputPath, getPathForWorkFile, getUniqueFile, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputPath

Methods inherited from class java.lang.Object

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

Constructor Detail

TriplesOrQuadsOutputFormat

public TriplesOrQuadsOutputFormat()