java - Jackson Polymorphic Deserialization expected START_ARRAY -

java - Jackson Polymorphic Deserialization expected START_ARRAY -

i need deserializa json this:

{ "arrayobj1":[ { "type":"t1", "value":[ { "value1":"a" }, { "value2":"b" } ], "otherinfo":"abc" } ] }

thats how seek it:

public class classa{ private arrayobj1[] arrayobj1;}

then...

public class arrayobj1 extends value{ private string type; private value [] value; @jsontypeinfo(use = jsontypeinfo.id.name, include = jsontypeinfo.as.external_property, property = "type") @jsonsubtypes(value={ @jsonsubtypes.type(value = t1.class, name = "t1") }) public void setvalue (value [] value){ this.value = value; } }

and...

public abstract class value {}

this error iv got: com.fasterxml.jackson.databind.jsonmappingexception: unexpected token (start_object), expected start_array: need json array contain as.wrapper_array type info class ... etc

how handle this? thanks.

edit: how deserialize:

public classa getobj (string jsonstring) { classa obj = null; seek { obj = new objectmapper().readvalue(jsonstring, classa.class); } grab (ioexception e) { e.printstacktrace(); } homecoming obj; }

full error is:

com.fasterxml.jackson.databind.jsonmappingexception: unexpected token (start_object), expected start_array: need json array contain as.wrapper_array type info class .value @ [source: java.io.stringreader@4317b868; line: 1, column: 496] (through reference chain: .classa["arrayobj1"]->.arrayobj1["value"])

given construction use, need 1 more level of classes contain external type id. this:

public class classa { private valuewrapper[] arrayobj1; } public class valuewrapper { @jsontypeinfo(use = jsontypeinfo.id.name, include = jsontypeinfo.as.external_property, property = "type") @jsonsubtypes(value={ @jsonsubtypes.type(value = t1.class, name = "t1") } public value value; public string otherinfo; // or utilize getters/setters in addition; left fields brevity } public abstract class value { ... }

)

however, looking @ json more closely, work if values pojos. if assumption type elements of value array, there no automated way that. unfortunately need handle polymorphic types manually.

java json jackson polymorphism