GroupOperation (Solr 8.6.0 API)

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

All Methods Instance Methods Concrete Methods
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 Detail
  - GroupOperation
```
public GroupOperation(StreamExpression expression,
                      StreamFactory factory)
               throws IOException
```
    Throws:
    
    IOException
  - GroupOperation
```
public GroupOperation(StreamComparator streamComparator,
                      int size)
```
- Method Detail
  - 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