Java AsArrayTypeDeserializer-class And Method Code Example

Here is an example of how to use the AsArrayTypeDeserializer class from the com.fasterxml.jackson.databind package in the Jackson library to deserialize JSON arrays into a collection of a specified Java class:

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.AsArrayTypeDeserializer;
import com.fasterxml.jackson.databind.JavaType;

public class MyArrayDeserializer extends AsArrayTypeDeserializer {

    public MyArrayDeserializer(JavaType selfType, JavaType valueType) {
        super(selfType, valueType);

    public Object deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
        // Do some custom deserialization logic here
        return super.deserialize(p, ctxt);

In this example, MyArrayDeserializer extends the AsArrayTypeDeserializer class and overrides the deserialize method to perform custom deserialization logic. The selfType and valueType parameters passed to the constructor define the type of the collection and the type of the elements in the collection, respectively.

You will need to register your custom deserializer with ObjectMapper

ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule();
module.addDeserializer(MyCollection.class, new MyArrayDeserializer(MyCollection.class, MyClass.class));

Note that this is just a example, you will need to modify it according to your needs.