org.apache.cassandra.db.filter

Class ColumnCounter.GroupByPrefix

java.lang.Object

org.apache.cassandra.db.filter.ColumnCounter

org.apache.cassandra.db.filter.ColumnCounter.GroupByPrefix

Enclosing class:

ColumnCounter

public static class ColumnCounter.GroupByPrefix
extends ColumnCounter

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.filter.ColumnCounter

ColumnCounter.GroupByPrefix

Field Summary

Fields inherited from class org.apache.cassandra.db.filter.ColumnCounter

ignored, live

Constructor Summary

Constructors

Constructor and Description
ColumnCounter.GroupByPrefix(CompositeType type, int toGroup) A column counter that count only 1 for all the columns sharing a given prefix of the key.

Method Summary

Methods

Modifier and Type	Method and Description
void	count(IColumn column, IColumnContainer container)

Methods inherited from class org.apache.cassandra.db.filter.ColumnCounter

ignored, isLive, live

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnCounter.GroupByPrefix

public ColumnCounter.GroupByPrefix(CompositeType type,
                           int toGroup)

A column counter that count only 1 for all the columns sharing a given prefix of the key.

Parameters:

type - the type of the column name. This can be null if toGroup is 0, otherwise it should be a composite.

toGroup - the number of composite components on which to group column. If 0, all columns are grouped, otherwise we group those for which the toGroup first component are equals.

Method Detail

count

public void count(IColumn column,
         IColumnContainer container)

Overrides:

count in class ColumnCounter