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/jsonFormatVisitors/JsonMapFormatVisitor.java

package com.fasterxml.jackson.databind.jsonFormatVisitors;

import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.SerializerProvider;

public interface JsonMapFormatVisitor extends JsonFormatVisitorWithSerializerProvider
{
    /**
     * Visit method called to indicate type of keys of the Map type
     * being visited
     */
    public void keyFormat(JsonFormatVisitable handler, JavaType keyType) throws JsonMappingException;

    /**
     * Visit method called after {@link #keyFormat} to allow visiting of
     * the value type
     */
    public void valueFormat(JsonFormatVisitable handler, JavaType valueType) throws JsonMappingException;
    
    /**
     * Default "empty" implementation, useful as the base to start on;
     * especially as it is guaranteed to implement all the method
     * of the interface, even if new methods are getting added.
     */
    public static class Base
        implements JsonMapFormatVisitor
    {
        protected SerializerProvider _provider;

        public Base() { }
        public Base(SerializerProvider p) { _provider = p; }

        @Override
        public SerializerProvider getProvider() { return _provider; }

        @Override
        public void setProvider(SerializerProvider p) { _provider = p; }

        @Override
        public void keyFormat(JsonFormatVisitable handler, JavaType keyType) throws JsonMappingException { }
        @Override
        public void valueFormat(JsonFormatVisitable handler, JavaType valueType) throws JsonMappingException { }
    }
}

⏎ com/fasterxml/jackson/databind/jsonFormatVisitors/JsonMapFormatVisitor.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