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/impl/TypeWrappedSerializer.java

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

import java.io.IOException;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;

/**
 * Simple serializer that will call configured type serializer, passing
 * in configured data serializer, and exposing it all as a simple
 * serializer.
 */
public final class TypeWrappedSerializer
    extends JsonSerializer<Object>
    implements ContextualSerializer // since 2.9
{
    final protected TypeSerializer _typeSerializer;
    final protected JsonSerializer<Object> _serializer;

    @SuppressWarnings("unchecked")
    public TypeWrappedSerializer(TypeSerializer typeSer, JsonSerializer<?> ser)
    {
        super();
        _typeSerializer = typeSer;
        _serializer = (JsonSerializer<Object>) ser;
    }

    @Override
    public void serialize(Object value, JsonGenerator g, SerializerProvider provider) throws IOException {
        _serializer.serializeWithType(value, g, provider, _typeSerializer);
    }

    @Override
    public void serializeWithType(Object value, JsonGenerator g, SerializerProvider provider,
            TypeSerializer typeSer) throws IOException
    {
        // Is this an erroneous call? For now, let's assume it is not, and
        // that type serializer is just overridden if so
        _serializer.serializeWithType(value, g, provider, typeSer);
    }

    @Override
    public Class<Object> handledType() { return Object.class; }

    /*
    /**********************************************************
    /* ContextualDeserializer
    /**********************************************************
     */

    @Override // since 2.9
    public JsonSerializer<?> createContextual(SerializerProvider provider, BeanProperty property)
        throws JsonMappingException
    {
        // 13-Mar-2017, tatu: Should we call `TypeSerializer.forProperty()`?
        JsonSerializer<?> ser = _serializer;
        if (ser instanceof ContextualSerializer) {
            ser = provider.handleSecondaryContextualization(ser, property);
        }
        if (ser == _serializer) {
            return this;
        }
        return new TypeWrappedSerializer(_typeSerializer, ser);
    }

    /*
    /**********************************************************
    /* Extended API for other core classes
    /**********************************************************
     */

    public JsonSerializer<Object> valueSerializer() {
        return _serializer;
    }

    public TypeSerializer typeSerializer() {
        return _typeSerializer;
    }
}

⏎ com/fasterxml/jackson/databind/ser/impl/TypeWrappedSerializer.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
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⇑⇑ Jackson - Java JSON library