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/ser/ContextualSerializer.java

package com.fasterxml.jackson.databind.ser;

import com.fasterxml.jackson.databind.*;

/**
 * Add-on interface that {@link JsonSerializer}s can implement to get a callback
 * that can be used to create contextual instances of serializer to use for
 * handling properties of supported type. This can be useful
 * for serializers that can be configured by annotations, or should otherwise
 * have differing behavior depending on what kind of property is being serialized.
 *<p>
 * Note that in cases where serializer needs both contextualization and
 * resolution -- that is, implements both this interface and {@link ResolvableSerializer}
 * -- resolution via {@link ResolvableSerializer} occurs first, and contextual
 * resolution (via this interface) later on.
 */
public interface ContextualSerializer
{
    /**
     * Method called to see if a different (or differently configured) serializer
     * is needed to serialize values of specified property.
     * Note that instance that this method is called on is typically shared one and
     * as a result method should <b>NOT</b> modify this instance but rather construct
     * and return a new instance. This instance should only be returned as-is, in case
     * it is already suitable for use.
     * 
     * @param prov Serializer provider to use for accessing config, other serializers
     * @param property Method or field that represents the property
     *   (and is used to access value to serialize).
     *   Should be available; but there may be cases where caller cannot provide it and
     *   null is passed instead (in which case impls usually pass 'this' serializer as is)
     * 
     * @return Serializer to use for serializing values of specified property;
     *   may be this instance or a new instance.
     * 
     * @throws JsonMappingException
     */
    public JsonSerializer<?> createContextual(SerializerProvider prov, BeanProperty property)
        throws JsonMappingException;
}

⏎ com/fasterxml/jackson/databind/ser/ContextualSerializer.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