|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | ENUM CONSTANTS | FIELD | METHOD | DETAIL: ENUM CONSTANTS | FIELD | METHOD |
java.lang.Objectjava.lang.Enum<AllocationPolicy>
org.olap4j.AllocationPolicy
public enum AllocationPolicy
Enumeration of the policies that can be used to modify the values of child cells when their parent cell is modified in a writeback operation.
Cell.setValue(java.lang.Object, org.olap4j.AllocationPolicy, java.lang.Object...)
Enum Constant Summary | |
---|---|
EQUAL_ALLOCATION
Every atomic cell that contributes to the updated cell will be assigned an equal value that is: <atomic cell value> = <value> / Count(atomic cells contained in <tuple>) |
|
EQUAL_INCREMENT
Every atomic cell that contributes to the updated cell will be changed according to: <atomic cell value> = <atomic cell value> + (<value> - <existing value>) / Count(atomic cells contained in <tuple>) |
|
WEIGHTED_ALLOCATION
Every atomic cell that contributes to the updated cell will be assigned an equal value that is: <atomic cell value> = <value> * <weight value expression> |
|
WEIGHTED_INCREMENT
Every atomic cell that contributes to the updated cell will be changed according to: <atomic cell value> = <atomic cell value> + (<value> - <existing value>) * <weight value expression> |
Method Summary | |
---|---|
static AllocationPolicy |
valueOf(String name)
Returns the enum constant of this type with the specified name. |
static AllocationPolicy[] |
values()
Returns an array containing the constants of this enum type, in the order they are declared. |
Methods inherited from class java.lang.Enum |
---|
compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf |
Methods inherited from class java.lang.Object |
---|
getClass, notify, notifyAll, wait, wait, wait |
Enum Constant Detail |
---|
public static final AllocationPolicy EQUAL_ALLOCATION
<atomic cell value> = <value> / Count(atomic cells contained in <tuple>)
public static final AllocationPolicy EQUAL_INCREMENT
<atomic cell value> = <atomic cell value> + (<value> - <existing value>) / Count(atomic cells contained in <tuple>)
public static final AllocationPolicy WEIGHTED_ALLOCATION
<atomic cell value> = <value> * <weight value expression>
Takes an optional argument, weight_value_expression
.
If weight_value_expression
is not provided, the following
expression is assigned to it by default:
<weight value expression> = <atomic cell value> / <existing value>The value of
weight value expression
should be expressed as a value between 0 and 1. This value specifies the ratio of the allocated value you want to assign to the atomic cells that are affected by the allocation. It is the client application programmer's responsibilffity to create expressions whose rollup aggregate values will equal the allocated value of the expression.
public static final AllocationPolicy WEIGHTED_INCREMENT
<atomic cell value> = <atomic cell value> + (<value> - <existing value>) * <weight value expression>
Takes an optional argument, weight_value_expression
.
If weight_value_expression
is not provided, the following
expression is assigned to it by default:
<weight value expression> = <atomic cell value> / <existing value>The value of
weight value expression
should be expressed as a value between 0 and 1. This value specifies the ratio of the allocated value you want to assign to the atomic cells that are affected by the allocation. It is the client application programmer's responsibility to create expressions whose rollup aggregate values will equal the allocated value of the expression.
Method Detail |
---|
public static AllocationPolicy[] values()
for (AllocationPolicy c : AllocationPolicy.values()) System.out.println(c);
public static AllocationPolicy valueOf(String name)
name
- the name of the enum constant to be returned.
IllegalArgumentException
- if this enum type has no constant
with the specified name
NullPointerException
- if the argument is null
|
|
||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | ENUM CONSTANTS | FIELD | METHOD | DETAIL: ENUM CONSTANTS | FIELD | METHOD |