org.ranksys.formats.rec

Class TuplesRecommendationFormat<U,I>

java.lang.Object

org.ranksys.formats.rec.TuplesRecommendationFormat<U,I>

Type Parameters:

U - user type

I - item type

All Implemented Interfaces:

RecommendationFormat<U,I>

Direct Known Subclasses:

SimpleRecommendationFormat, TRECRecommendationFormat, ZipRecommendationFormat

public class TuplesRecommendationFormat<U,I>
extends Object
implements RecommendationFormat<U,I>

Reader for formats where recommendations are stored in tuples, one each line.

Author:

Saúl Vargas (Saul@VargasSandoval.es)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	TuplesRecommendationFormat.Reader Reader of recommendations.
protected class	TuplesRecommendationFormat.Writer Writer of recommendations.

Constructor Summary

Constructors

Constructor and Description
TuplesRecommendationFormat(org.jooq.lambda.function.Function4<U,I,Double,Long,String> tupleWriter, Function<String,org.jooq.lambda.tuple.Tuple3<U,I,Double>> tupleReader) Constructor.
TuplesRecommendationFormat(org.jooq.lambda.function.Function4<U,I,Double,Long,String> tupleWriter, Function<String,org.jooq.lambda.tuple.Tuple3<U,I,Double>> tupleReader, boolean sortByDecreasingScore) Constructor.

Method Summary

Modifier and Type	Method and Description
RecommendationFormat.Reader<U,I>	getReader(InputStream in) Gets a reader for an input stream.
RecommendationFormat.Writer<U,I>	getWriter(OutputStream out) Gets a writer for an output stream.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.ranksys.formats.rec.RecommendationFormat

getReader, getReader, getReader, getWriter, getWriter, getWriter

Constructor Detail

TuplesRecommendationFormat

public TuplesRecommendationFormat(org.jooq.lambda.function.Function4<U,I,Double,Long,String> tupleWriter,
                                  Function<String,org.jooq.lambda.tuple.Tuple3<U,I,Double>> tupleReader)

Constructor.

Parameters:

tupleWriter - tuple writer

tupleReader - tuple reader

TuplesRecommendationFormat

public TuplesRecommendationFormat(org.jooq.lambda.function.Function4<U,I,Double,Long,String> tupleWriter,
                                  Function<String,org.jooq.lambda.tuple.Tuple3<U,I,Double>> tupleReader,
                                  boolean sortByDecreasingScore)

Constructor.

Parameters:

tupleWriter - tuple writer

tupleReader - tuple reader

sortByDecreasingScore - sort read tuples by decreasing score?

Method Detail

getWriter

public RecommendationFormat.Writer<U,I> getWriter(OutputStream out)
                                           throws IOException

Description copied from interface: RecommendationFormat

Gets a writer for an output stream.

Specified by:

getWriter in interface RecommendationFormat<U,I>

Parameters:

out - output stream

Returns:

a recommendation writer

Throws:

IOException - if path does not exist or IO error

getReader

public RecommendationFormat.Reader<U,I> getReader(InputStream in)
                                           throws IOException

Description copied from interface: RecommendationFormat

Gets a reader for an input stream.

Specified by:

getReader in interface RecommendationFormat<U,I>

Parameters:

in - input stream

Returns:

a recommendation reader

Throws:

IOException - when IO error