org.apache.jena.hadoop.rdf.io.registry.writers

Class AbstractWriterFactory

java.lang.Object

org.apache.jena.hadoop.rdf.io.registry.writers.AbstractWriterFactory

All Implemented Interfaces:

WriterFactory

Direct Known Subclasses:

JsonLDWriterFactory, ThriftWriterFactory

public abstract class AbstractWriterFactory
extends Object
implements WriterFactory

Abstract writer factory for languages that support triples and quads

Constructor Summary

Constructors

Constructor and Description
AbstractWriterFactory(Lang lang)
AbstractWriterFactory(Lang lang, Collection<Lang> altLangs)
AbstractWriterFactory(Lang lang, Lang... altLangs)

Method Summary

Modifier and Type	Method and Description
boolean	canWriteQuads() Gets whether this factory can produce writers that are capable of reading quads
boolean	canWriteTriples() Gets whether this factory can produce writers that are capable of reading triples
abstract <TKey> org.apache.hadoop.mapreduce.RecordWriter<TKey,QuadWritable>	createQuadWriter(Writer writer, org.apache.hadoop.conf.Configuration config) Creates a quad writer
abstract <TKey> org.apache.hadoop.mapreduce.RecordWriter<TKey,TripleWritable>	createTripleWriter(Writer writer, org.apache.hadoop.conf.Configuration config) Creates a triples writer
Collection<Lang>	getAlternativeLanguages() Gets the alternative languages this factory can produce writers for
Lang	getPrimaryLanguage() Gets the primary language this factory produces writers for

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractWriterFactory

public AbstractWriterFactory(Lang lang)

AbstractWriterFactory

public AbstractWriterFactory(Lang lang,
                             Lang... altLangs)

AbstractWriterFactory

public AbstractWriterFactory(Lang lang,
                             Collection<Lang> altLangs)

Method Detail

getPrimaryLanguage

public final Lang getPrimaryLanguage()

Description copied from interface: WriterFactory

Gets the primary language this factory produces writers for

Specified by:

getPrimaryLanguage in interface WriterFactory

Returns:

Primary language

getAlternativeLanguages

public final Collection<Lang> getAlternativeLanguages()

Description copied from interface: WriterFactory

Gets the alternative languages this factory can produce writers for

Specified by:

getAlternativeLanguages in interface WriterFactory

Returns:

Alternative languages

canWriteQuads

public final boolean canWriteQuads()

Description copied from interface: WriterFactory

Gets whether this factory can produce writers that are capable of reading quads

Specified by:

canWriteQuads in interface WriterFactory

Returns:

True if quads can be read, false if not

canWriteTriples

public final boolean canWriteTriples()

Description copied from interface: WriterFactory

Gets whether this factory can produce writers that are capable of reading triples

Specified by:

canWriteTriples in interface WriterFactory

Returns:

True if triples can be read, false if not

createQuadWriter

public abstract <TKey> org.apache.hadoop.mapreduce.RecordWriter<TKey,QuadWritable> createQuadWriter(Writer writer,
                                                                                                    org.apache.hadoop.conf.Configuration config)
                                                                                             throws IOException

Description copied from interface: WriterFactory

Creates a quad writer

Specified by:

createQuadWriter in interface WriterFactory

Parameters:

writer - Writer

config - Configuration

Returns:

Quad writer

Throws:

IOException - May be thrown if a quad writer cannot be created

createTripleWriter

public abstract <TKey> org.apache.hadoop.mapreduce.RecordWriter<TKey,TripleWritable> createTripleWriter(Writer writer,
                                                                                                        org.apache.hadoop.conf.Configuration config)
                                                                                                 throws IOException

Description copied from interface: WriterFactory

Creates a triples writer

Specified by:

createTripleWriter in interface WriterFactory

Parameters:

writer - Writer

config - Configuration

Returns:

Triples writer

Throws:

IOException - May be thrown if a triple writer cannot be created