How to deserialize an EnumSet?

[da...@bakins-bits.com]

Can someone show me how to deserialize an EnumSet (presumably using EnumSetDeserializer)?  Serialize works as expected, but deserialize fails in the face of type erasure.  I can't find an example anywhere ... yet the class EnumSetDeserializer is there.

Perhaps you can't do it for a "standalone" "root" EnumSet but it does work (somehow) for an EnumSet which is a property of a class which you are serializing instead?

For this purpose the EnumSet is instantiated at a fixed type, e.g., it will always be EnumSet<Foo> for some enum type Foo, either standalone or as a property in a containing class.  So a solution which doesn't need type metadata written to the JSON would be extra nice (though a solution which does have type metadata written to the JSON is ok I suppose).

(I know how to finesse the issue by using an array instead, as arrays don't suffer type erasure, but the property type is more naturally a set ... and the class EnumSetDeserializer is there ...)

Thanks! -- David

[Tatu Saloranta]

It should "Just Work". How are you trying to use it?

There are bunch of tests at

src/test/java/com/fasterxml/jackson/databind/deser/TestEnumDeserialization.java

for example.

-+ Tatu +-

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[da...@bakins-bits.com]

You're right.  I didn't understand how to use the TypeReference parameter to one of the readValue() overloads to tell it what to do.  Thanks for the pointer to the test case! -- David

[Tatu Saloranta]

Ah. Glad it works out then; Java's Type Erasure can be a pain.

-+ Tatu +-

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