Guava Enum Mapper

Have you ever wondered how to map enums from one to another ? Did you use switch statement to make it work ? Now you can use method immutableEnumMap from class Maps which is part of Guava. Below you can find an example.

public class EnumSourceMapper {

    static ImmutableMap<EnumSource, EnumDestination> mapper;

    static {
        mapper = Maps.immutableEnumMap(ImmutableMap.<EnumSource, EnumDestination>builder()
                .put(EnumSource.SUCCESS,                  EnumDestination.SUCCESS)
                .put(EnumSource.INCOMPLETE,               EnumDestination.ERROR)
                .put(EnumSource.FAIL,                     EnumDestination.ERROR)
                .build());
    }

    public EnumDestination getEnumDestination(EnumSource enumSource) {
        return mapper.get(enumSource);
    }
}

Reference:

[1] Pastebin source code