org.apache.solr.client.solrj.io.stream

Class RankStream

java.lang.Object

org.apache.solr.client.solrj.io.stream.TupleStream

org.apache.solr.client.solrj.io.stream.RankStream

All Implemented Interfaces:

Serializable, ExpressibleStream

public class RankStream
extends TupleStream
implements ExpressibleStream

Iterates over a TupleStream and Ranks the topN tuples based on a Comparator.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RankStream(StreamExpression expression, StreamFactory factory)
RankStream(TupleStream tupleStream, int size, Comparator<Tuple> comp)

Method Summary

Methods

Modifier and Type	Method and Description
List<TupleStream>	children()
void	close()
Comparator<Tuple>	getComparator()
int	getCost()
void	open()
Tuple	read()
void	setStreamContext(StreamContext context)
StreamExpression	toExpression(StreamFactory factory)

Methods inherited from class java.lang.Object

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

Constructor Detail

RankStream

public RankStream(TupleStream tupleStream,
          int size,
          Comparator<Tuple> comp)

RankStream

public RankStream(StreamExpression expression,
          StreamFactory factory)
           throws IOException

Throws:

IOException

Method Detail

toExpression

public StreamExpression toExpression(StreamFactory factory)
                              throws IOException

Specified by:

toExpression in interface ExpressibleStream

Throws:

IOException

setStreamContext

public void setStreamContext(StreamContext context)

Specified by:

setStreamContext in class TupleStream

children

public List<TupleStream> children()

Specified by:

children in class TupleStream

open

public void open()
          throws IOException

Specified by:

open in class TupleStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in class TupleStream

Throws:

IOException

getComparator

public Comparator<Tuple> getComparator()

read

public Tuple read()
           throws IOException

Specified by:

read in class TupleStream

Throws:

IOException

getCost

public int getCost()

Overrides:

getCost in class TupleStream