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

Class AbstractQuadsOnlyReaderFactory

java.lang.Object

org.apache.jena.hadoop.rdf.io.registry.readers.AbstractQuadsOnlyReaderFactory

All Implemented Interfaces:

ReaderFactory

Direct Known Subclasses:

NQuadsReaderFactory, TriGReaderFactory, TriXReaderFactory

public abstract class AbstractQuadsOnlyReaderFactory
extends Object
implements ReaderFactory

Abstract reader factory for languages that only support quads

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
boolean	canReadQuads() Gets whether this factory can produce readers that are capable of reading quads
boolean	canReadTriples() Gets whether this factory can produce readers that are capable of reading triples
abstract org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.LongWritable,QuadWritable>	createQuadReader() Creates a quad reader
org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.LongWritable,TripleWritable>	createTripleReader() Creates a triples reader
Collection<Lang>	getAlternativeLanguages() Gets the alternative languages this factory can produce readers for
Lang	getPrimaryLanguage() Gets the primary language this factory produces readers for

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractQuadsOnlyReaderFactory

public AbstractQuadsOnlyReaderFactory(Lang lang)

AbstractQuadsOnlyReaderFactory

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

AbstractQuadsOnlyReaderFactory

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

Method Detail

getPrimaryLanguage

public final Lang getPrimaryLanguage()

Description copied from interface: ReaderFactory

Gets the primary language this factory produces readers for

Specified by:

getPrimaryLanguage in interface ReaderFactory

Returns:

Primary language

getAlternativeLanguages

public final Collection<Lang> getAlternativeLanguages()

Description copied from interface: ReaderFactory

Gets the alternative languages this factory can produce readers for

Specified by:

getAlternativeLanguages in interface ReaderFactory

Returns:

Alternative languages

canReadQuads

public final boolean canReadQuads()

Description copied from interface: ReaderFactory

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

Specified by:

canReadQuads in interface ReaderFactory

Returns:

True if quads can be read, false if not

canReadTriples

public final boolean canReadTriples()

Description copied from interface: ReaderFactory

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

Specified by:

canReadTriples in interface ReaderFactory

Returns:

True if triples can be read, false if not

createQuadReader

public abstract org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.LongWritable,QuadWritable> createQuadReader()
                                                                                                                   throws IOException

Description copied from interface: ReaderFactory

Creates a quad reader

Specified by:

createQuadReader in interface ReaderFactory

Returns:

Quad reader

Throws:

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

createTripleReader

public final org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.LongWritable,TripleWritable> createTripleReader()
                                                                                                                    throws IOException

Description copied from interface: ReaderFactory

Creates a triples reader

Specified by:

createTripleReader in interface ReaderFactory

Returns:

Triples reader

Throws:

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