Package com.activeviam.directquery.api

Class MeasureMapping

java.lang.Object

com.activeviam.directquery.api.MeasureMapping

public final class MeasureMapping
extends Object

Mapping between an aggregation on the fields of a schema and the column of the aggregate table.

Method Summary

Modifier and Type	Method	Description
static MeasureMapping	agg(String aggregationFunctionKey, List<FieldPath> originFields, List<String> targetColumnNames)
static MeasureMapping	avg(FieldPath originField, String targetSumField, String targetColumnName)	Creates a mapping for a pre-aggregated average.
static MeasureMapping	count(String targetColumnName)	Creates a mapping for a pre-aggregated count.
boolean	equals(Object o)
String	getAggregationFunctionKey()
List<FieldPath>	getOriginFields()
List<String>	getTargetColumnNames()
int	hashCode()
static MeasureMapping	max(FieldPath originField, String targetColumnName)	Creates a mapping for a pre-aggregated maximum.
static MeasureMapping	min(FieldPath originField, String targetColumnName)	Creates a mapping for a pre-aggregated minimum.
static MeasureMapping	sum(FieldPath originField, String targetColumnName)	Creates a mapping for a pre-aggregated Sum.
static MeasureMapping	sumProduct(List<FieldPath> originFields, String targetColumnName)	Creates a mapping for a pre-aggregated sum product.
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Details

count

public static MeasureMapping count(String targetColumnName)

Creates a mapping for a pre-aggregated count.

Parameters:

targetColumnName - the name of the column containing the pre-aggregated count.

sum

public static MeasureMapping sum(FieldPath originField,
 String targetColumnName)

Creates a mapping for a pre-aggregated Sum.

Parameters:

originField - the field of the origin schema which is aggregated.

targetColumnName - the name of the column containing the pre-aggregated sum.

min

public static MeasureMapping min(FieldPath originField,
 String targetColumnName)

Creates a mapping for a pre-aggregated minimum.

Parameters:

originField - the field of the origin schema which is aggregated.

targetColumnName - the name of the column containing the pre-aggregated min.

max

public static MeasureMapping max(FieldPath originField,
 String targetColumnName)

Creates a mapping for a pre-aggregated maximum.

Parameters:

originField - the field of the origin schema which is aggregated.

targetColumnName - the name of the column containing the pre-aggregated max.

avg

public static MeasureMapping avg(FieldPath originField,
 String targetSumField,
 String targetColumnName)

Creates a mapping for a pre-aggregated average. Note that average cannot simply be pre-aggregated into a single column containing the average, in order to be able to re-aggregate the data it requires two pre-aggregated columns: one containing the pre-aggregated sum and the other containing the pre-aggregated count.

Parameters:

originField - the field of the origin schema which is aggregated.

targetSumField - the name of the column containing the pre-aggregated sum.

targetColumnName - the name of the column containing the pre-aggregated count.

sumProduct

public static MeasureMapping sumProduct(List<FieldPath> originFields,
 String targetColumnName)

Creates a mapping for a pre-aggregated sum product.

Parameters:

originFields - the fields of the origin schema on which the sum product is applied.

targetColumnName - the name of the column containing the pre-aggregated sum product.

agg

public static MeasureMapping agg(String aggregationFunctionKey,
 List<FieldPath> originFields,
 List<String> targetColumnNames)

getAggregationFunctionKey

public String getAggregationFunctionKey()

getOriginFields

public List<FieldPath> getOriginFields()

getTargetColumnNames

public List<String> getTargetColumnNames()

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