Package org.zkoss.pivot.impl

Enum StandardCalculator

java.lang.Object

java.lang.Enum<StandardCalculator>

org.zkoss.pivot.impl.StandardCalculator

All Implemented Interfaces:

Serializable, Comparable<StandardCalculator>, Calculator, ContextualCalculator

public enum StandardCalculator
extends Enum<StandardCalculator>
implements ContextualCalculator

The built-in Calculator set for TabularPivotModel.

Author:

simonpai

Enum Constant Summary

Enum Constants

Enum Constant	Description
AVERAGE	Calculates the arithmetic average of data.
COUNT	Returns the count of data, including non-number entries.
COUNT_NUMBER	Returns the count of numerical data.
MAX	Calculates the maximum of data.
MIN	Calculates the minimum of data.
PRODUCT	Returns the arithmetic product of data.
STD_DEV	Returns the sample standard deviation.
STD_DEV_P	Returns the standard deviation of the sample.
SUM	Returns the arithmetic sum of data.
SUM_OR_COUNT	Returns the sum of data if the data entries are all numeric.
VARIANCE	Returns the variance corresponding to the sample standard deviation.
VARIANCE_P	Returns the variance corresponding to the standard deviation of the sample.

Method Summary

Modifier and Type	Method	Description
StandardContextType	getContextType()	Get the ContextType.
String	getLabel()
String	getLabelKey()
Number	getResult(Context context)	Retrieve the aggregation result from the context.
static StandardCalculator	valueOf(String name)	Returns the enum constant of this type with the specified name.
static StandardCalculator[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SUM

public static final StandardCalculator SUM

Returns the arithmetic sum of data. Non numeric values are omitted. Returns 0 if no numeric values are present.

COUNT

public static final StandardCalculator COUNT

Returns the count of data, including non-number entries.

AVERAGE

public static final StandardCalculator AVERAGE

Calculates the arithmetic average of data. Non numeric values are omitted. Returns null if no numeric values are present.

MAX

public static final StandardCalculator MAX

Calculates the maximum of data. Non numeric values are omitted. Returns null if no numeric values are present.

MIN

public static final StandardCalculator MIN

Calculates the minimum of data. Non numeric values are omitted. Returns null if no numeric values are present.

SUM_OR_COUNT

public static final StandardCalculator SUM_OR_COUNT

Returns the sum of data if the data entries are all numeric. Returns count of data otherwise.

COUNT_NUMBER

public static final StandardCalculator COUNT_NUMBER

Returns the count of numerical data. Non-number entries are omitted.

PRODUCT

public static final StandardCalculator PRODUCT

Returns the arithmetic product of data. Non numeric values are omitted. Returns 1 if no numeric values are present.

STD_DEV

public static final StandardCalculator STD_DEV

Returns the sample standard deviation. (The one with variance by dividing N - 1.)

STD_DEV_P

public static final StandardCalculator STD_DEV_P

Returns the standard deviation of the sample. (The one with variance by dividing N.)

VARIANCE

public static final StandardCalculator VARIANCE

Returns the variance corresponding to the sample standard deviation. (The one by dividing N - 1.)

VARIANCE_P

public static final StandardCalculator VARIANCE_P

Returns the variance corresponding to the standard deviation of the sample. (The one by dividing N.)

Method Detail

values

public static StandardCalculator[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (StandardCalculator c : StandardCalculator.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static StandardCalculator valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getResult

public Number getResult(Context context)

Description copied from interface: ContextualCalculator

Retrieve the aggregation result from the context.

Specified by:

getResult in interface ContextualCalculator

getContextType

public StandardContextType getContextType()

Description copied from interface: ContextualCalculator

Get the ContextType.

Specified by:

getContextType in interface ContextualCalculator

getLabel

public String getLabel()

Specified by:

getLabel in interface Calculator

getLabelKey

public String getLabelKey()

Specified by:

getLabelKey in interface Calculator