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/ObjectIdValueProperty.java

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

import java.io.IOException;
import java.lang.annotation.Annotation;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.deser.*;
import com.fasterxml.jackson.databind.introspect.AnnotatedMember;

/**
 * Specialized {@link SettableBeanProperty} implementation used
 * for virtual property that represents Object Id that is used
 * for some POJO types (or properties).
 */
public final class ObjectIdValueProperty
    extends SettableBeanProperty
{
    private static final long serialVersionUID = 1L;

    protected final ObjectIdReader _objectIdReader;

    public ObjectIdValueProperty(ObjectIdReader objectIdReader,
            PropertyMetadata metadata)
    {
        super(objectIdReader.propertyName, objectIdReader.getIdType(), metadata,
                objectIdReader.getDeserializer());
        _objectIdReader = objectIdReader;
    }

    protected ObjectIdValueProperty(ObjectIdValueProperty src, JsonDeserializer<?> deser,
            NullValueProvider nva)
    {
        super(src, deser, nva);
        _objectIdReader = src._objectIdReader;
    }

    protected ObjectIdValueProperty(ObjectIdValueProperty src, PropertyName newName) {
        super(src, newName);
        _objectIdReader = src._objectIdReader;
    }

    @Override
    public SettableBeanProperty withName(PropertyName newName) {
        return new ObjectIdValueProperty(this, newName);
    }

    @Override
    public SettableBeanProperty withValueDeserializer(JsonDeserializer<?> deser) {
        if (_valueDeserializer == deser) {
            return this;
        }
        // 07-May-2019, tatu: As per [databind#2303], must keep VD/NVP in-sync if they were
        NullValueProvider nvp = (_valueDeserializer == _nullProvider) ? deser : _nullProvider;
        return new ObjectIdValueProperty(this, deser, nvp);
    }

    @Override
    public SettableBeanProperty withNullProvider(NullValueProvider nva) {
        return new ObjectIdValueProperty(this, _valueDeserializer, nva);
    }

    // // // BeanProperty impl
    
    @Override
    public <A extends Annotation> A getAnnotation(Class<A> acls) {
        return null;
    }

    @Override public AnnotatedMember getMember() {  return null; }

    /*
    /**********************************************************
    /* Deserialization methods
    /**********************************************************
     */

    @Override
    public void deserializeAndSet(JsonParser p, DeserializationContext ctxt,
            Object instance) throws IOException
    {
        deserializeSetAndReturn(p, ctxt, instance);
    }

    @Override
    public Object deserializeSetAndReturn(JsonParser p,
    		DeserializationContext ctxt, Object instance) throws IOException
    {
        /* 02-Apr-2015, tatu: Actually, as per [databind#742], let it be;
         *  missing or null id is needed for some cases, such as cases where id
         *  will be generated externally, at a later point, and is not available
         *  quite yet. Typical use case is with DB inserts.
         */
        // note: no null checks (unlike usually); deserializer should fail if one found
        if (p.hasToken(JsonToken.VALUE_NULL)) {
            return null;
        }
        Object id = _valueDeserializer.deserialize(p, ctxt);
        ReadableObjectId roid = ctxt.findObjectId(id, _objectIdReader.generator, _objectIdReader.resolver);
        roid.bindItem(instance);
        // also: may need to set a property value as well
        SettableBeanProperty idProp = _objectIdReader.idProperty;
        if (idProp != null) {
            return idProp.setAndReturn(instance, id);
        }
        return instance;
    }

    @Override
    public void set(Object instance, Object value) throws IOException {
        setAndReturn(instance, value);
    }

    @Override
    public Object setAndReturn(Object instance, Object value) throws IOException
    {
        SettableBeanProperty idProp = _objectIdReader.idProperty;
        if (idProp == null) {
            throw new UnsupportedOperationException(
                    "Should not call set() on ObjectIdProperty that has no SettableBeanProperty");
        }
        return idProp.setAndReturn(instance, value);
    }
}

⏎ com/fasterxml/jackson/databind/deser/impl/ObjectIdValueProperty.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

⇐ Download and Install Jackson Binary Package

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library