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/node/JsonNodeType.java

package com.fasterxml.jackson.databind.node;

/**
 * Enumeration of JSON types.
 * Covers all JSON types defined by <a
 * href="http://tools.ietf.org/html/rfc4627">RFC 4627</a> (array, boolean,
 * null, number, object and string) but also Jackson-specific types: binary,
 * missing and POJO; although does not distinguish between more granular
 * types.
 *
 * @see BinaryNode
 * @see MissingNode
 * @see POJONode
 * 
 * @since 2.2
 */
public enum JsonNodeType
{
    ARRAY,
    BINARY,
    BOOLEAN,
    MISSING,
    NULL,
    NUMBER,
    OBJECT,
    POJO,
    STRING
}

⏎ com/fasterxml/jackson/databind/node/JsonNodeType.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