JSON Mapping Exception constructing Map Key of enum from string

I'm getting a JSON Mapping exception when trying to construct a HashMap. The map is keyed on an enum

The input开发者_开发百科 looks like this:

{"someObject":{"myMap":{"1":"2"}}}

Problem is it treats the "1" as a String and complains that it's not a valid representation as it's not one of the values of the enum.

Any idea how to fix this?

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Have you tried using the actual names of the enum values instead of their ordinal values?

enum Direction {
    NORTH,SOUTH,EAST,WEST;
}

and

{"someObject":{"myMap":{"NORTH":"2"}}}