Here is an example of how to use the DefaultBaseTypeLimitingValidator class in the com.fasterxml.jackson.databind package to limit the base types that can be used for deserialization:

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.PolymorphicTypeValidator;

public class Example {
    public static void main(String[] args) throws Exception {
        String json = "{\"type\":\"dog\",\"name\":\"Fido\",\"bark\":true}";

        ObjectMapper mapper = new ObjectMapper();

        // Create a default base type limiting validator
        PolymorphicTypeValidator ptv = DefaultBaseTypeLimitingValidator.instance
                                            .forBaseType(Animal.class);
        mapper.activateDefaultTyping(ptv);
        // deserialize JSON
        Animal animal = mapper.readValue(json, Animal.class);

        // Use the deserialized object
        System.out.println(animal);
    }
}

abstract class Animal {
    protected String name;
    public Animal(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
}
class Dog extends Animal {
    private boolean bark;
    public Dog(String name, boolean bark) {
        super(name);
        this.bark = bark;
    }
    public boolean isBark() {
        return bark;
    }
}
class Cat extends Animal {
    private boolean meow;
    public Cat(String name, boolean meow) {
        super(name);
        this.meow = meow;
    }
    public boolean isMeow() {
        return meow;
    }
}
class Animals {
}

In this example, an instance of the ObjectMapper class is used to deserialize a JSON string into an instance of the Animals class.