java - Jackson: Reuse json property as type id during deserialization -


in spring rest controller need deserialize dto:

// enum private ctype ctype;   @jsontypeinfo(use = jsontypeinfo.id.name,         include = jsontypeinfo.as.external_property,          property = "ctype") @jsonsubtypes({@type(value = initplp.class, name = "p")}) private initpl initpl;   @jsontypeinfo(         use = jsontypeinfo.id.name,         include = jsontypeinfo.as.external_property,         property = "ctype") @jsonsubtypes({@type(value = scidp.class, name = "p")}) private scid scid;   // getters ...

when trying deserialize like:

{     "ctype": "p",     "initpl": { ... },     "scid": { ... } }

there jsonmappingexception: unexpected token (value_null), expected value_string: need json string contains type id (for subtype of com.xmpl.initpl)

interestingly, both scid , initpl can deserialized on own. if part of same payload it'll break.

to me seems ctype can looked once during deserialization.

so basically, how can reuse typeid?

does have idea?


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