Jackson Data Binding Source Code

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

  • Jackson Data Binding module allows you to converts JSON to and from POJO (Plain Old Java Object) using property accessor or using annotations.
  • Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.12.4-sources.jar). You can download it at Jackson Maven Website.

    You can also browse Jackson Databind Source Code below:

    ✍: FYIcenter.com

    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

     

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    2022-03-29, 32106👍, 0💬