{ "type":"cat", "animal":{"name":"cat"} }
Animal is an abstract class
. Cat and Dog are subclass
.
Now I am trying to convert json to java object
and want to use "type" to get the subclass.
But the type field is out of animal the column.
Thanks in advance :)
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property= "type")
@JsonSubTypes({ @Type(value = Cat.class, name = "cat"),
@Type(value = Dog.class, name = "dog") })
abstract class Animal {
public String name;
}
class Cat extends Animal {
public String name;
}
class Dog extends Animal {
public String name;
}
the question is the type is out of animal{}.
if the type is in the animal{} the code will works. but it isn`t ):
It's possible, but type in JSON should looks like "type":"com.test.Cat"
(fully qualified name)
Abstract class
@JsonTypeInfo(use=JsonTypeInfo.Id.CLASS, include=JsonTypeInfo.As.PROPERTY, property="type")
public abstract class AAnimal
{
}
subclasses
public class Cat extends AAnimal
{
public String name;
}
public class Dog extends AAnimal
{
public String name;
}
now, for json
"{ \"type\":\"com.test.Dog\", \"name\":\"gav-gav\" }"
it will be Dog
instance
and for
"{ \"type\":\"com.test.Cat\", \"name\":\"mew-mew\" }"
it will be Cat
instance
EDIT
In this case use JsonTypeInfo.As.EXTERNAL_PROPERTY
. Example
public class Container
{
private String type;
private AAnimal animal;
public String getType()
{
return type;
}
public void setType(String type)
{
this.type = type;
}
public AAnimal getAnimal()
{
return animal;
}
@JsonTypeInfo(use=JsonTypeInfo.Id.CLASS, include=JsonTypeInfo.As.EXTERNAL_PROPERTY, property="type")
public void setAnimal(AAnimal animal)
{
this.animal = animal;
}
}
Animal classes
public abstract class AAnimal
{
public String name;
}
public class Cat extends AAnimal
{
}
public class Dog extends AAnimal
{
}
for
"{\"type\":\"com.test.Cat\", \"animal\" : {\"name\":\"cat\" }}"
it works well.
PS.
Also you can use use=JsonTypeInfo.Id.MINIMAL_CLASS
, in this case you can use only part of fully qualified name
EDIT2
@JsonTypeInfo(use=JsonTypeInfo.Id.NAME, include=JsonTypeInfo.As.EXTERNAL_PROPERTY, property="type")
@JsonSubTypes({ @Type(value = Cat.class, name = "cat"), @Type(value = Dog.class, name = "dog") })
public void setAnimal(AAnimal animal)
{
this.animal = animal;
}
works well for
"{\"type\":\"cat\", \"animal\" : {\"name\":\"cat\" }}"
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