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/deser/impl/NullsAsEmptyProvider.java

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

import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.deser.NullValueProvider;
import com.fasterxml.jackson.databind.util.AccessPattern;

/**
 * Simple {@link NullValueProvider} that will return "empty value"
 * specified by {@link JsonDeserializer} provider is constructed with.
 */
public class NullsAsEmptyProvider
    implements NullValueProvider, java.io.Serializable
{
    private static final long serialVersionUID = 1L;

    protected final JsonDeserializer<?> _deserializer;

    public NullsAsEmptyProvider(JsonDeserializer<?> deser) {
        _deserializer = deser;
    }

    @Override
    public AccessPattern getNullAccessPattern() {
        return AccessPattern.DYNAMIC;
    }

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

⏎ com/fasterxml/jackson/databind/deser/impl/NullsAsEmptyProvider.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
Download 

⇒ Jackson Annotations Source Code

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⇑⇑ Jackson - Java JSON library