EnumMappingStrategy (MapStruct 1.6.2)

All Known Implementing Classes:

DefaultEnumMappingStrategy
```
@Experimental("This SPI can have its signature changed in subsequent releases")
public interface EnumMappingStrategy
```
A service provider interface for the mapping between different enum constants

Since:

1.4

Author:

Arne Seime, Filip Hrisafov

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`String`	`getDefaultNullEnumConstant(TypeElement enumType)`	Return the default enum constant to use if the source is null.
`String`	`getEnumConstant(TypeElement enumType, String enumConstant)`	Map the enum constant to the value use for matching.
`TypeElement`	`getUnexpectedValueMappingExceptionType()`	Return the type element of the exception that should be used in the generated code for an unexpected enum constant.
`default void`	`init(MapStructProcessingEnvironment processingEnvironment)`	Initializes the enum value mapping strategy

- Method Detail
  - init
```
default void init(MapStructProcessingEnvironment processingEnvironment)
```
    Initializes the enum value mapping strategy
    
    Parameters:
    
    processingEnvironment - environment for facilities
  - getDefaultNullEnumConstant
```
String getDefaultNullEnumConstant(TypeElement enumType)
```
    Return the default enum constant to use if the source is null.
    
    Parameters:
    
    enumType - the enum
    
    Returns:
    
    enum value or null if there is no designated enum constant
  - getEnumConstant
```
String getEnumConstant(TypeElement enumType,
                       String enumConstant)
```
    Map the enum constant to the value use for matching. In case you want this enum constant to match to null return MappingConstants.NULL
    
    Parameters:
    
    enumType - the enum this constant belongs to
    
    enumConstant - constant to transform
    
    Returns:
    
    the transformed constant - or the original value from the parameter if no transformation is needed. never return null
  - getUnexpectedValueMappingExceptionType
```
TypeElement getUnexpectedValueMappingExceptionType()
```
    Return the type element of the exception that should be used in the generated code for an unexpected enum constant.
    
    Returns:
    
    the type element of the exception that should be used, never null