Java CreatorCollector-class And Method Code Example

Here is an example of how to use the CreatorCollector class in the com.fasterxml.jackson.databind package in Java:

import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
import com.fasterxml.jackson.databind.introspect.AnnotatedWithParams;
import com.fasterxml.jackson.databind.util.ClassUtil;
import com.fasterxml.jackson.databind.CreatorCollector;

public class MyClass {

    public static void main(String[] args) {
        JavaType type = // construct the appropriate type
        CreatorCollector cc = new CreatorCollector(type);
        cc.addPropertyCreator(createAnnotatedWithParams(), true);
        cc.addDelegatingCreator(createAnnotatedWithParams(), true, ClassUtil.findClass("DelegateClass"));
        cc.addStringCreator(createAnnotatedWithParams(), true);
        cc.addIntCreator(createAnnotatedWithParams(), true);
        cc.addLongCreator(createAnnotatedWithParams(), true);
        cc.addDoubleCreator(createAnnotatedWithParams(), true);
        cc.addBooleanCreator(createAnnotatedWithParams(), true);
        cc.addObjectIdCreator(createAnnotatedWithParams(), true);

    private static AnnotatedWithParams createAnnotatedWithParams() {
        // implementation to create instance of AnnotatedWithParams

In this example, an instance of JavaType is constructed and then used to create an instance of CreatorCollector. Then methods like addPropertyCreator, addDelegatingCreator, addStringCreator and others are used to add different type of creators to the cc object.

Each of these method takes two arguments, first is an instance of AnnotatedWithParams that represents the constructor or factory method, and second is a boolean value indicating whether the creator is the primary one or not.

Additionally, addDelegatingCreator also takes a class argument which is the class of the delegate, used for creating instances of that class.

The AnnotatedWithParams class is a base class for constructors and factory methods and can be create using the createAnnotatedWithParams method in this example.

Keep in mind that this is just an example, you can use CreatorCollector class in different way based on your requirement.