Package org.apache.solr.client.solrj.io.ops

Class GroupOperation

java.lang.Object

org.apache.solr.client.solrj.io.ops.GroupOperation

All Implemented Interfaces:

Serializable, ReduceOperation, StreamOperation, Expressible

public class GroupOperation
extends Object
implements ReduceOperation

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
GroupOperation(StreamComparator streamComparator, int size)
GroupOperation(StreamExpression expression, StreamFactory factory)

Method Summary

Modifier and Type	Method	Description
void	operate(Tuple tuple)
Tuple	reduce()
Explanation	toExplanation(StreamFactory factory)	Returns an explanation about the stream object
StreamExpressionParameter	toExpression(StreamFactory factory)

Methods inherited from class java.lang.Object

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

Constructor Details

GroupOperation

public GroupOperation(StreamExpression expression,
 StreamFactory factory)
               throws IOException

Throws:

IOException

GroupOperation

public GroupOperation(StreamComparator streamComparator,
 int size)

Method Details

toExpression

public StreamExpressionParameter toExpression(StreamFactory factory)
                                       throws IOException

Specified by:

toExpression in interface Expressible

Throws:

IOException

toExplanation

public Explanation toExplanation(StreamFactory factory)
                          throws IOException

Description copied from interface: Expressible

Returns an explanation about the stream object

Specified by:

toExplanation in interface Expressible

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

reduce

public Tuple reduce()

Specified by:

reduce in interface ReduceOperation

operate

public void operate(Tuple tuple)

Specified by:

operate in interface StreamOperation