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/impl/TypeWrappedDeserializer.java

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

import java.io.IOException;
import java.util.Collection;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
import com.fasterxml.jackson.databind.type.LogicalType;

/**
 * Simple deserializer that will call configured type deserializer, passing
 * in configured data deserializer, and exposing it all as a simple
 * deserializer.
 * This is necessary when there is no "parent" deserializer which could handle
 * details of calling a {@link TypeDeserializer}, most commonly used with
 * root values.
 */
public final class TypeWrappedDeserializer
    extends JsonDeserializer<Object>
    implements java.io.Serializable // since 2.5
{
    private static final long serialVersionUID = 1L;

    final protected TypeDeserializer _typeDeserializer;
    final protected JsonDeserializer<Object> _deserializer;

    @SuppressWarnings("unchecked")
    public TypeWrappedDeserializer(TypeDeserializer typeDeser, JsonDeserializer<?> deser)
    {
        super();
        _typeDeserializer = typeDeser;
        _deserializer = (JsonDeserializer<Object>) deser;
    }

    @Override // since 2.12
    public LogicalType logicalType() {
        return _deserializer.logicalType();
    }

    @Override
    public Class<?> handledType() {
        return _deserializer.handledType();
    }

    @Override // since 2.9
    public Boolean supportsUpdate(DeserializationConfig config) {
        return _deserializer.supportsUpdate(config);
    }
    
    @Override
    public JsonDeserializer<?> getDelegatee() {
        return _deserializer.getDelegatee();
    }

    @Override
    public Collection<Object> getKnownPropertyNames() {
        return _deserializer.getKnownPropertyNames();
    }

    @Override
    public Object getNullValue(DeserializationContext ctxt) throws JsonMappingException {
        return _deserializer.getNullValue(ctxt);
    }

    @Override
    public Object getEmptyValue(DeserializationContext ctxt) throws JsonMappingException {
        return _deserializer.getEmptyValue(ctxt);
    }
    
    @Override
    public Object deserialize(JsonParser p, DeserializationContext ctxt) throws IOException
    {
        return _deserializer.deserializeWithType(p, ctxt, _typeDeserializer);
    }

    @Override
    public Object deserializeWithType(JsonParser p, DeserializationContext ctxt,
        TypeDeserializer typeDeserializer) throws IOException
    {
        // should never happen? (if it can, could call on that object)
        throw new IllegalStateException("Type-wrapped deserializer's deserializeWithType should never get called");
    }

    @Override
    public Object deserialize(JsonParser p, DeserializationContext ctxt,
            Object intoValue) throws IOException
    {
        /* 01-Mar-2013, tatu: Hmmh. Tough call as to what to do... need
         *   to delegate, but will this work reliably? Let's just hope so:
         */
        return _deserializer.deserialize(p,  ctxt, intoValue);
    }
}

⏎ com/fasterxml/jackson/databind/deser/impl/TypeWrappedDeserializer.java

 

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