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java.lang.Objectorg.apache.cassandra.db.filter.ColumnCounter
org.apache.cassandra.db.filter.ColumnCounter.GroupByPrefix
public static class ColumnCounter.GroupByPrefix
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.cassandra.db.filter.ColumnCounter |
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ColumnCounter.GroupByPrefix |
Field Summary |
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Fields inherited from class org.apache.cassandra.db.filter.ColumnCounter |
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ignored, live |
Constructor Summary | |
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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 | |
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void |
count(IColumn column,
IColumnContainer container)
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Methods inherited from class org.apache.cassandra.db.filter.ColumnCounter |
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ignored, isLive, live |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ColumnCounter.GroupByPrefix(CompositeType type, int toGroup)
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 |
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public void count(IColumn column, IColumnContainer container)
count
in class ColumnCounter
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