Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Annotations Source Code files are provided in the source packge (jackson-annotations-2.12.4-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Annotations Source Code below:

⏎ com/fasterxml/jackson/databind/deser/std/JdkDeserializers.java

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

import java.nio.ByteBuffer;
import java.util.*;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

import com.fasterxml.jackson.databind.*;

/**
 * Container class that contains serializers for JDK types that
 * require special handling for some reason.
 */
public class JdkDeserializers
{
    private final static HashSet<String> _classNames = new HashSet<String>();
    static {
        // note: can skip primitive types; other ways to check them:
        Class<?>[] types = new Class<?>[] {
                UUID.class,
                AtomicBoolean.class,
                AtomicInteger.class,
                AtomicLong.class,
                StackTraceElement.class,
                ByteBuffer.class,
                Void.class
        };
        for (Class<?> cls : types) { _classNames.add(cls.getName()); }
        for (Class<?> cls : FromStringDeserializer.types()) { _classNames.add(cls.getName()); }
    }

    public static JsonDeserializer<?> find(Class<?> rawType, String clsName)
    {
        if (_classNames.contains(clsName)) {
            JsonDeserializer<?> d = FromStringDeserializer.findDeserializer(rawType);
            if (d != null) {
                return d;
            }
            if (rawType == UUID.class) {
                return new UUIDDeserializer();
            }
            if (rawType == StackTraceElement.class) {
                return new StackTraceElementDeserializer();
            }
            if (rawType == AtomicBoolean.class) {
                return new AtomicBooleanDeserializer();
            }
            if (rawType == AtomicInteger.class) {
                return new AtomicIntegerDeserializer();
            }
            if (rawType == AtomicLong.class) {
                return new AtomicLongDeserializer();
            }
            if (rawType == ByteBuffer.class) {
                return new ByteBufferDeserializer();
            }
            if (rawType == Void.class) {
                return NullifyingDeserializer.instance;
            }
        }
        return null;
    }

    // @since 2.11
    public static boolean hasDeserializerFor(Class<?> rawType) {
        return _classNames.contains(rawType.getName());
    }
}

⏎ com/fasterxml/jackson/databind/deser/std/JdkDeserializers.java

 

⇒ Jackson Dataformat Extensions

⇐ Jackson Data Binding Source Code

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library