com.googlecode.jinahya.lang

Class FieldEnumHelper

java.lang.Object

com.googlecode.jinahya.lang.FieldEnumHelper

public class FieldEnumHelper
extends Object

A helper class for FieldEnum.

Author:

Jin Kwon

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FieldEnumHelper() Creates a new instance.

Method Summary

Methods

Modifier and Type	Method and Description
static <E extends Enum<E> & FieldEnum<E,F>,F> F[]	fieldValues(Class<E> enumType, Class<F> fieldType) Returns an array containing the field values of specified enum type, in the order those enum constants returned from E.values()
static <E extends Enum<E> & FieldEnum<E,F>,F> E	fromFieldValue(Class<E> enumType, F fieldValue) Returns the enum constant of specified enum type with specified field value.

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldEnumHelper

protected FieldEnumHelper()

Creates a new instance.

Method Detail

fieldValues

public static <E extends Enum<E> & FieldEnum<E,F>,F> F[] fieldValues(Class<E> enumType,
                                                    Class<F> fieldType)

Returns an array containing the field values of specified enum type, in the order those enum constants returned from E.values()

Type Parameters:

E - enum type parameter

F - field type parameter

Parameters:

enumType - enum type

fieldType - field type

Returns:

an array containing the field values of this enum type

fromFieldValue

public static <E extends Enum<E> & FieldEnum<E,F>,F> E fromFieldValue(Class<E> enumType,
                                                     F fieldValue)

Returns the enum constant of specified enum type with specified field value.

Type Parameters:

E - enum type parameter

F - field type parameter

Parameters:

enumType - enum type

fieldValue - field value

Returns:

the mapped enum constant.

Throws:

NullPointerException - if enumType is null

IllegalArgumentException - if the specified enum type has no constant with the specified field value, or the specified class object does not represent an enum type