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/ObjectIdReferenceProperty.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.databind.*;
import com.fasterxml.jackson.databind.deser.NullValueProvider;
import com.fasterxml.jackson.databind.deser.SettableBeanProperty;
import com.fasterxml.jackson.databind.deser.UnresolvedForwardReference;
import com.fasterxml.jackson.databind.deser.impl.ReadableObjectId.Referring;
import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
import com.fasterxml.jackson.databind.introspect.ObjectIdInfo;

public class ObjectIdReferenceProperty extends SettableBeanProperty
{
    private static final long serialVersionUID = 1L;

    private final SettableBeanProperty _forward;

    public ObjectIdReferenceProperty(SettableBeanProperty forward, ObjectIdInfo objectIdInfo)
    {
        super(forward);
        _forward = forward;
        _objectIdInfo = objectIdInfo;
    }

    public ObjectIdReferenceProperty(ObjectIdReferenceProperty src, JsonDeserializer<?> deser,
            NullValueProvider nva)
    {
        super(src, deser, nva);
        _forward = src._forward;
        _objectIdInfo = src._objectIdInfo;
    }

    public ObjectIdReferenceProperty(ObjectIdReferenceProperty src, PropertyName newName)
    {
        super(src, newName);
        _forward = src._forward;
        _objectIdInfo = src._objectIdInfo;
    }

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

    @Override
    public SettableBeanProperty withNullProvider(NullValueProvider nva) {
        return new ObjectIdReferenceProperty(this, _valueDeserializer, nva);
    }
    
    @Override
    public void fixAccess(DeserializationConfig config) {
        if (_forward != null) {
            _forward.fixAccess(config);
        }
    }

    @Override
    public <A extends Annotation> A getAnnotation(Class<A> acls) {
        return _forward.getAnnotation(acls);
    }

    @Override
    public AnnotatedMember getMember() {
        return _forward.getMember();
    }

    @Override
    public int getCreatorIndex() {
        return _forward.getCreatorIndex();
    }

    @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
    {
        try {
            return setAndReturn(instance, deserialize(p, ctxt));
        } catch (UnresolvedForwardReference reference) {
            boolean usingIdentityInfo = (_objectIdInfo != null) || (_valueDeserializer.getObjectIdReader() != null);
            if (!usingIdentityInfo) {
                throw JsonMappingException.from(p, "Unresolved forward reference but no identity info", reference);
            }
            reference.getRoid().appendReferring(new PropertyReferring(this, reference, _type.getRawClass(), instance));
            return null;
        }
    }

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

    @Override
    public Object setAndReturn(Object instance, Object value) throws IOException {
        return _forward.setAndReturn(instance, value);
    }

    public final static class PropertyReferring extends Referring {
        private final ObjectIdReferenceProperty _parent;
        public final Object _pojo;

        public PropertyReferring(ObjectIdReferenceProperty parent,
                UnresolvedForwardReference ref, Class<?> type, Object ob)
        {
            super(ref, type);
            _parent = parent;
            _pojo = ob;
        }

        @Override
        public void handleResolvedForwardReference(Object id, Object value) throws IOException
        {
            if (!hasId(id)) {
                throw new IllegalArgumentException("Trying to resolve a forward reference with id [" + id
                        + "] that wasn't previously seen as unresolved.");
            }
            _parent.set(_pojo, value);
        }
    }
}

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

 

⇒ Jackson Dataformat Extensions

⇐ Jackson Data Binding Source Code

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library