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/std/AtomicLongDeserializer.java

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

import java.io.IOException;
import java.util.concurrent.atomic.AtomicLong;

import com.fasterxml.jackson.core.JsonParser;

import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.type.LogicalType;

// @since 2.12
public class AtomicLongDeserializer extends StdScalarDeserializer<AtomicLong>
{
    private static final long serialVersionUID = 1L;

    public AtomicLongDeserializer() { super(AtomicLong.class); }

    @Override
    public AtomicLong deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
        if (p.isExpectedNumberIntToken()) {
            return new AtomicLong(p.getLongValue());
        }
        // 12-Jun-2020, tatu: May look convoluted, but need to work correctly with
        //   CoercionConfig
        Long L = _parseLong(p, ctxt, AtomicLong.class);
        return (L == null) ? null : new AtomicLong(L.intValue());
    }

    @Override
    public LogicalType logicalType() { return LogicalType.Integer; }

    @Override // @since 2.12
    public Object getEmptyValue(DeserializationContext ctxt) throws JsonMappingException {
        return new AtomicLong();
    }
}

⏎ com/fasterxml/jackson/databind/deser/std/AtomicLongDeserializer.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 

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⇑⇑ Jackson - Java JSON library