Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.14.0-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Databind Source Code below:

⏎ com/fasterxml/jackson/databind/annotation/JsonTypeResolver.java

package com.fasterxml.jackson.databind.annotation;

import java.lang.annotation.*;

import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;

/**
 * Annotation that can be used to explicitly define custom resolver
 * used for handling serialization and deserialization of type information,
 * needed for handling of polymorphic types (or sometimes just for linking
 * abstract types to concrete types)
 *<p>
 * NOTE: since 2.4, applicable to properties as well (should have been long time
 *  ago, but problem only found then)
 */
@Target({ElementType.ANNOTATION_TYPE, ElementType.METHOD, ElementType.FIELD, ElementType.TYPE, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@com.fasterxml.jackson.annotation.JacksonAnnotation
public @interface JsonTypeResolver
{
    /**
     * Defines implementation class of {@link TypeResolverBuilder} which is used to construct
     * actual {@link com.fasterxml.jackson.databind.jsontype.TypeDeserializer} and {@link com.fasterxml.jackson.databind.jsontype.TypeDeserializer}
     * instances that handle reading and writing addition type information needed to support polymorphic
     * deserialization.
     */
    public Class<? extends TypeResolverBuilder<?>> value();
}

⏎ com/fasterxml/jackson/databind/annotation/JsonTypeResolver.java

Or download all of them as a single archive file:

File name: jackson-databind-2.14.0-sources.jar
File size: 1187952 bytes
Release date: 2022-11-05
Download 

⇒ Jackson Annotations Source Code

⇐ Download and Install Jackson Binary Package

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library