Package org.dashbuilder.dataset.engine.index.stats

Class DataSetIndexStatsImpl

java.lang.Object

org.dashbuilder.dataset.engine.index.stats.DataSetIndexStatsImpl

All Implemented Interfaces:

DataSetIndexStats, DataSetIndexVisitor

public class DataSetIndexStatsImpl
extends Object
implements DataSetIndexStats, DataSetIndexVisitor

A DataSetIndex stats

Constructor Summary

Constructors

Constructor	Description
DataSetIndexStatsImpl(DataSetIndex index)

Method Summary

Modifier and Type	Method	Description
long	getBuildTime()	Time required to "build" (load, create, filter, ...) the data set.
long	getIndexSize()	Return the estimated memory (in bytes) the data set index is consuming.
DataSetIndexElement	getLessReused()	An index reference to the less reused element.
DataSetIndexElement	getLongestBuild()	An index reference to the element that takes more time to get instantiated.
DataSetIndexElement	getMostReused()	An index reference to the most reused element.
int	getNumberOfAggFunctions()	Total number of aggregate function calculations executed over the data set
int	getNumberOfFilterOps()	Total number of filter operations executed over the data set
int	getNumberOfGroupOps()	Total number of group operations over the data set
int	getNumberOfSortOps()	Total number of sort operations executed over the data set
double	getReuseRate()	The ratio between the reuse time and the build time.
long	getReuseTime()	The real usage time this element would have if was not indexed.
DataSetIndexElement	getShortestBuild()	An index reference to the element that takes less time to get instantiated.
String	toString()
String	toString(String sep)	Prints a stats summary.
void	visit(DataSetIndexElement element)

Methods inherited from class java.lang.Object

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

Constructor Detail

DataSetIndexStatsImpl

public DataSetIndexStatsImpl(DataSetIndex index)

Method Detail

visit

public void visit(DataSetIndexElement element)

Specified by:

visit in interface DataSetIndexVisitor

getReuseRate

public double getReuseRate()

Description copied from interface: DataSetIndexStats

The ratio between the reuse time and the build time.

Specified by:

getReuseRate in interface DataSetIndexStats

getBuildTime

public long getBuildTime()

Description copied from interface: DataSetIndexStats

Time required to "build" (load, create, filter, ...) the data set.

Specified by:

getBuildTime in interface DataSetIndexStats

Returns:

Time in nanoseconds

getReuseTime

public long getReuseTime()

Description copied from interface: DataSetIndexStats

The real usage time this element would have if was not indexed.

Specified by:

getReuseTime in interface DataSetIndexStats

Returns:

Time in nanoseconds

getLongestBuild

public DataSetIndexElement getLongestBuild()

Description copied from interface: DataSetIndexStats

An index reference to the element that takes more time to get instantiated.

Specified by:

getLongestBuild in interface DataSetIndexStats

getShortestBuild

public DataSetIndexElement getShortestBuild()

Description copied from interface: DataSetIndexStats

An index reference to the element that takes less time to get instantiated.

Specified by:

getShortestBuild in interface DataSetIndexStats

getLessReused

public DataSetIndexElement getLessReused()

Description copied from interface: DataSetIndexStats

An index reference to the less reused element.

Specified by:

getLessReused in interface DataSetIndexStats

getMostReused

public DataSetIndexElement getMostReused()

Description copied from interface: DataSetIndexStats

An index reference to the most reused element.

Specified by:

getMostReused in interface DataSetIndexStats

getIndexSize

public long getIndexSize()

Description copied from interface: DataSetIndexStats

Return the estimated memory (in bytes) the data set index is consuming.

Specified by:

getIndexSize in interface DataSetIndexStats

Returns:

The number of bytes

getNumberOfGroupOps

public int getNumberOfGroupOps()

Description copied from interface: DataSetIndexStats

Total number of group operations over the data set

Specified by:

getNumberOfGroupOps in interface DataSetIndexStats

getNumberOfFilterOps

public int getNumberOfFilterOps()

Description copied from interface: DataSetIndexStats

Total number of filter operations executed over the data set

Specified by:

getNumberOfFilterOps in interface DataSetIndexStats

getNumberOfSortOps

public int getNumberOfSortOps()

Description copied from interface: DataSetIndexStats

Total number of sort operations executed over the data set

Specified by:

getNumberOfSortOps in interface DataSetIndexStats

getNumberOfAggFunctions

public int getNumberOfAggFunctions()

Description copied from interface: DataSetIndexStats

Total number of aggregate function calculations executed over the data set

Specified by:

getNumberOfAggFunctions in interface DataSetIndexStats

toString

public String toString()

Overrides:

toString in class Object

toString

public String toString(String sep)

Description copied from interface: DataSetIndexStats

Prints a stats summary.

Specified by:

toString in interface DataSetIndexStats

Parameters:

sep - The separator string to insert between every stat.