Package org.apache.druid.math.expr

Enum ExprType

java.lang.Object

java.lang.Enum<ExprType>

org.apache.druid.math.expr.ExprType

All Implemented Interfaces:

Serializable, Comparable<ExprType>, TypeDescriptor

@Immutable
public enum ExprType
extends Enum<ExprType>
implements TypeDescriptor

Base 'value' types of Druid expression language, all Expr must evaluate to one of these types.

Enum Constant Summary

Enum Constants

Enum Constant	Description
ARRAY
COMPLEX
DOUBLE
LONG
STRING

Method Summary

Modifier and Type	Method	Description
boolean	isArray()	Value is an array of some other TypeDescriptor
boolean	isNumeric()	Scalar numeric primitive values.
boolean	isPrimitive()	Scalar numeric and string values.
static ExprType	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ExprType[]	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

DOUBLE

public static final ExprType DOUBLE

LONG

public static final ExprType LONG

STRING

public static final ExprType STRING

ARRAY

public static final ExprType ARRAY

COMPLEX

public static final ExprType COMPLEX

Method Detail

values

public static ExprType[] 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 (ExprType c : ExprType.values())
    System.out.println(c);

Returns:

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

valueOf

public static ExprType 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

isNumeric

public boolean isNumeric()

Description copied from interface: TypeDescriptor

Scalar numeric primitive values.

Specified by:

isNumeric in interface TypeDescriptor

See Also:

ValueType.isNumeric(), isNumeric()

isPrimitive

public boolean isPrimitive()

Description copied from interface: TypeDescriptor

Scalar numeric and string values. This does not currently include complex types.

Specified by:

isPrimitive in interface TypeDescriptor

See Also:

ValueType.isPrimitive(), isPrimitive()

isArray

public boolean isArray()

Description copied from interface: TypeDescriptor

Value is an array of some other TypeDescriptor

Specified by:

isArray in interface TypeDescriptor

See Also:

ValueType.isArray(), isArray()