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/std/StdJdkSerializers.java

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

import java.io.*;
import java.lang.reflect.Type;
import java.util.*;
import java.util.concurrent.atomic.*;

import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.ser.BasicSerializerFactory;

/**
 * Class that providers access to serializers user for non-structured JDK types that
 * are serializer as scalars; some using basic {@link ToStringSerializer},
 * others explicit serializers.
 */
@SuppressWarnings("serial")
public class StdJdkSerializers
{
    /**
     * Method called by {@link BasicSerializerFactory} to access
     * all serializers this class provides.
     */
    public static Collection<Map.Entry<Class<?>, Object>> all()
    {
        HashMap<Class<?>,Object> sers = new HashMap<Class<?>,Object>();

        // First things that 'toString()' can handle
        sers.put(java.net.URL.class, new ToStringSerializer(java.net.URL.class));
        sers.put(java.net.URI.class, new ToStringSerializer(java.net.URI.class));

        sers.put(Currency.class, new ToStringSerializer(Currency.class));
        sers.put(UUID.class, new UUIDSerializer());
        sers.put(java.util.regex.Pattern.class, new ToStringSerializer(java.util.regex.Pattern.class));
        sers.put(Locale.class, new ToStringSerializer(Locale.class));

        // then atomic types (note: AtomicReference defined elsewhere)
        sers.put(AtomicBoolean.class, AtomicBooleanSerializer.class);
        sers.put(AtomicInteger.class, AtomicIntegerSerializer.class);
        sers.put(AtomicLong.class, AtomicLongSerializer.class);

        // then other types that need specialized serializers
        sers.put(File.class, FileSerializer.class);
        sers.put(Class.class, ClassSerializer.class);

        // And then some stranger types... not 100% they are needed but:
        sers.put(Void.class, NullSerializer.instance);
        sers.put(Void.TYPE, NullSerializer.instance);

        return sers.entrySet();
    }

    /*
    /**********************************************************
    /* Serializers for atomic types
    /**********************************************************
     */

    public static class AtomicBooleanSerializer
        extends StdScalarSerializer<AtomicBoolean>
    {
        public AtomicBooleanSerializer() { super(AtomicBoolean.class, false); }
    
        @Override
        public void serialize(AtomicBoolean value, JsonGenerator gen, SerializerProvider provider) throws IOException {
            gen.writeBoolean(value.get());
        }
    
        @Override
        public JsonNode getSchema(SerializerProvider provider, Type typeHint) {
            return createSchemaNode("boolean", true);
        }
        
        @Override
        public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException {
            visitor.expectBooleanFormat(typeHint);
        }
    }
    
    public static class AtomicIntegerSerializer
        extends StdScalarSerializer<AtomicInteger>
    {
        public AtomicIntegerSerializer() { super(AtomicInteger.class, false); }
    
        @Override
        public void serialize(AtomicInteger value, JsonGenerator gen, SerializerProvider provider) throws IOException {
            gen.writeNumber(value.get());
        }
    
        @Override
        public JsonNode getSchema(SerializerProvider provider, Type typeHint) {
            return createSchemaNode("integer", true);
        }
        
        @Override
        public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException
        {
            visitIntFormat(visitor, typeHint, JsonParser.NumberType.INT);
        }
    }

    public static class AtomicLongSerializer
        extends StdScalarSerializer<AtomicLong>
    {
        public AtomicLongSerializer() { super(AtomicLong.class, false); }
    
        @Override
        public void serialize(AtomicLong value, JsonGenerator gen, SerializerProvider provider) throws IOException {
            gen.writeNumber(value.get());
        }
    
        @Override
        public JsonNode getSchema(SerializerProvider provider, Type typeHint) {
            return createSchemaNode("integer", true);
        }
        
        @Override
        public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
            throws JsonMappingException
        {
            visitIntFormat(visitor, typeHint, JsonParser.NumberType.LONG);
        }
    }
}

⏎ com/fasterxml/jackson/databind/ser/std/StdJdkSerializers.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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