org.olap4j.type

Class TypeUtil

java.lang.Object

org.olap4j.type.TypeUtil

public class TypeUtil
extends Object

Utility methods relating to types.

NOTE: This class is experimental. Not part of the public olap4j API.

Since:

Feb 17, 2005

Author:

jhyde

Constructor Summary

Constructors

Constructor and Description
TypeUtil()

Method Summary

Modifier and Type	Method and Description
static boolean	canEvaluate(Type type) Returns whether a value of a given type can be evaluated to a scalar value.
static boolean	isSet(Type type) Returns whether a type is a set type.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TypeUtil

public TypeUtil()

Method Detail

canEvaluate

public static boolean canEvaluate(Type type)

Returns whether a value of a given type can be evaluated to a scalar value.

The rules are as follows:

• Clearly boolean, numeric and string expressions can be evaluated.
• Member and tuple expressions can be interpreted as a scalar value. The expression is evaluated to establish the context where a measure can be evaluated.
• Hierarchy and dimension expressions are implicitly converted into the current member, and evaluated as above.
• Level expressions cannot be evaluated
• Cube and Set (even sets with a single member) cannot be evaluated.

Parameters:

type - Type

Returns:

Whether an expression of this type can be evaluated to yield a scalar value.

isSet

public static boolean isSet(Type type)

Returns whether a type is a set type.

Parameters:

type - Type

Returns:

Whether a value of this type can be evaluated to yield a set.