Class ScoreNodesStream
- java.lang.Object
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- org.apache.solr.client.solrj.io.stream.TupleStream
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- org.apache.solr.client.solrj.io.stream.ScoreNodesStream
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- All Implemented Interfaces:
Closeable
,Serializable
,AutoCloseable
,Expressible
,org.apache.solr.common.MapSerializable
,org.apache.solr.common.MapWriter
,org.apache.solr.common.NavigableObject
,org.noggit.JSONWriter.Writable
public class ScoreNodesStream extends TupleStream implements Expressible
Iterates over a gatherNodes() expression and scores the Tuples based on tf-idf.Expression Syntax:
Default function call uses the "count(*)" field for termFreq.
You can use a different value for termFreq by providing the termFreq param scoreNodes(gatherNodes(...), termFreq="min(weight)")
- Since:
- 6.2.0
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.solr.client.solrj.io.stream.TupleStream
TupleStream.IgnoreException
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Constructor Summary
Constructors Constructor Description ScoreNodesStream(StreamExpression expression, StreamFactory factory)
ScoreNodesStream(TupleStream tupleStream, String nodeFreqField)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description List<TupleStream>
children()
void
close()
StreamComparator
getComparator()
int
getCost()
StreamComparator
getStreamSort()
void
open()
Tuple
read()
void
setStreamContext(StreamContext context)
Explanation
toExplanation(StreamFactory factory)
Returns an explanation about the stream objectStreamExpression
toExpression(StreamFactory factory)
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Methods inherited from class org.apache.solr.client.solrj.io.stream.TupleStream
getShards, getShards, getStreamNodeId, writeMap
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Field Detail
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zkHost
protected String zkHost
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Constructor Detail
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ScoreNodesStream
public ScoreNodesStream(TupleStream tupleStream, String nodeFreqField) throws IOException
- Throws:
IOException
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ScoreNodesStream
public ScoreNodesStream(StreamExpression expression, StreamFactory factory) throws IOException
- Throws:
IOException
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Method Detail
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toExpression
public StreamExpression toExpression(StreamFactory factory) throws IOException
- Specified by:
toExpression
in interfaceExpressible
- Throws:
IOException
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toExplanation
public Explanation toExplanation(StreamFactory factory) throws IOException
Description copied from interface:Expressible
Returns an explanation about the stream object- Specified by:
toExplanation
in interfaceExpressible
- Specified by:
toExplanation
in classTupleStream
- Parameters:
factory
- Stream factory for this, contains information about the function name- Returns:
- Explanation about this stream object containing explanations of any child stream objects
- Throws:
IOException
- throw on any error
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setStreamContext
public void setStreamContext(StreamContext context)
- Specified by:
setStreamContext
in classTupleStream
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children
public List<TupleStream> children()
- Specified by:
children
in classTupleStream
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open
public void open() throws IOException
- Specified by:
open
in classTupleStream
- Throws:
IOException
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close
public void close() throws IOException
- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Specified by:
close
in classTupleStream
- Throws:
IOException
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getComparator
public StreamComparator getComparator()
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read
public Tuple read() throws IOException
- Specified by:
read
in classTupleStream
- Throws:
IOException
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getStreamSort
public StreamComparator getStreamSort()
- Specified by:
getStreamSort
in classTupleStream
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getCost
public int getCost()
- Overrides:
getCost
in classTupleStream
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