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General data-binding functionality for Jackson: works on core streaming API

There is a newer version: 2.17.0

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

import java.util.*;


import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ser.SerializerCache.TypeKey;

/**
 * Optimized lookup table for accessing two types of serializers; typed
 * and non-typed. Only accessed from a single thread, so no synchronization
 * needed for accessors.
 */
public final class ReadOnlyClassToSerializerMap
{
    /**
     * Actual mappings from type key to serializers
     */
    protected final JsonSerializerMap _map;

    /**
     * We'll reuse key class to avoid unnecessary instantiations; since
     * this is not shared between threads, we can just reuse single
     * instance.
     */
    protected TypeKey _cacheKey = null;
    
    private ReadOnlyClassToSerializerMap(JsonSerializerMap map) {
        _map = map;
    }

    public ReadOnlyClassToSerializerMap instance() {
        return new ReadOnlyClassToSerializerMap(_map);
    }

    /**
     * Factory method for creating the "blueprint" lookup map. Such map
     * can not be used as is but just shared: to get an actual usable
     * instance, {@link #instance} has to be called first.
     */
    public static ReadOnlyClassToSerializerMap from(HashMap> src) {
        return new ReadOnlyClassToSerializerMap(new JsonSerializerMap(src));
    }

    public JsonSerializer