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/jsontype/impl/AsArrayTypeSerializer.java

package com.fasterxml.jackson.databind.jsontype.impl;

import com.fasterxml.jackson.annotation.JsonTypeInfo.As;

import com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.jsontype.TypeIdResolver;

/**
 * Type serializer that will embed type information in an array,
 * as the first element, and actual value as the second element.
 */
public class AsArrayTypeSerializer extends TypeSerializerBase
{
    public AsArrayTypeSerializer(TypeIdResolver idRes, BeanProperty property) {
        super(idRes, property);
    }

    @Override
    public AsArrayTypeSerializer forProperty(BeanProperty prop) {
        return (_property == prop) ? this : new AsArrayTypeSerializer(_idResolver, prop);
    }
    
    @Override
    public As getTypeInclusion() { return As.WRAPPER_ARRAY; }
}

⏎ com/fasterxml/jackson/databind/jsontype/impl/AsArrayTypeSerializer.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