com.haulmont.chile.core.datatypes.impl

Class EnumUtils

java.lang.Object

com.haulmont.chile.core.datatypes.impl.EnumUtils

public class EnumUtils
extends java.lang.Object

A helper class to be used in EnumClass implementations to convert identifiers to enum values.

Constructor Summary

Constructors

Constructor and Description
EnumUtils()

Method Summary

Modifier and Type	Method and Description
static <T extends java.lang.Enum<T> & EnumClass<V>,V> T	fromId(java.lang.Class<T> e, V id) Returns an enum value for the given id.
static <T extends java.lang.Enum<T> & EnumClass<V>,V> T	fromId(java.lang.Class<T> e, V id, T defaultValue) Returns an enum value for the given id.
static <T extends java.lang.Enum<T> & EnumClass<V>,V> T	fromIdSafe(java.lang.Class<T> e, V id, T defaultValue) Returns an enum value for the given id, or the default value if null is passed or there are no enum values with the given id.

Methods inherited from class java.lang.Object

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

Constructor Detail

EnumUtils

public EnumUtils()

Method Detail

fromId

@Nullable
public static <T extends java.lang.Enum<T> & EnumClass<V>,V> T fromId(java.lang.Class<T> e,
                                                                                V id)

Returns an enum value for the given id.

Parameters:

e - enum class

id - id

Returns:

enum value or null if the passed id is null

Throws:

java.lang.IllegalArgumentException - if there are no enum values with the given id

fromId

public static <T extends java.lang.Enum<T> & EnumClass<V>,V> T fromId(java.lang.Class<T> e,
                                                                      V id,
                                                                      T defaultValue)

Returns an enum value for the given id.

Parameters:

e - enum class

id - id

defaultValue - the value to return if null is passed as id

Returns:

enum value

Throws:

java.lang.IllegalArgumentException - if there are no enum values with the given id

fromIdSafe

public static <T extends java.lang.Enum<T> & EnumClass<V>,V> T fromIdSafe(java.lang.Class<T> e,
                                                                          V id,
                                                                          T defaultValue)

Returns an enum value for the given id, or the default value if null is passed or there are no enum values with the given id.

Parameters:

e - enum class

id - id

defaultValue - the value to return if null is passed as id or if there are no enum values with the given id

Returns:

enum value