Package org.apache.ignite.internal.processors.query.stat

Class ObjectStatisticsImpl

java.lang.Object

org.apache.ignite.internal.processors.query.stat.ObjectStatisticsImpl

All Implemented Interfaces:

Cloneable, ObjectStatistics

Direct Known Subclasses:

ObjectPartitionStatisticsImpl

public class ObjectStatisticsImpl
extends Object
implements Cloneable, ObjectStatistics

All statistics by some object (table or index).

Constructor Summary

Constructors

Constructor	Description
ObjectStatisticsImpl(long rowsCnt, Map<String,ColumnStatistics> colNameToStat)	Constructor.

Method Summary

Modifier and Type	Method	Description
ObjectStatisticsImpl	clone()
Map<String,ColumnStatistics>	columnsStatistics()
ColumnStatistics	columnStatistics(String colName)	Get column statistics.
boolean	equals(Object o)
int	hashCode()
long	rowCount()
<T extends ObjectStatisticsImpl> T	subtract(Set<String> cols)	Remove specified columns from clone of current ObjectStatistics object.
String	toString()

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ObjectStatisticsImpl

public ObjectStatisticsImpl(long rowsCnt,
                            Map<String,ColumnStatistics> colNameToStat)

Constructor.

Parameters:

rowsCnt - Total rows count.

colNameToStat - Column names to statistics map.

Method Detail

rowCount

public long rowCount()

Returns:

Object rows count.

columnStatistics

public ColumnStatistics columnStatistics(String colName)

Get column statistics.

Parameters:

colName - Column name.

Returns:

Column statistics or null if there are no statistics for specified column.

columnsStatistics

public Map<String,ColumnStatistics> columnsStatistics()

Returns:

Column statistics map.

clone

public ObjectStatisticsImpl clone()

Overrides:

clone in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

subtract

public <T extends ObjectStatisticsImpl> T subtract(Set<String> cols)

Remove specified columns from clone of current ObjectStatistics object.

Parameters:

cols - Columns to remove.

Returns:

Cloned object without specified columns statistics.