Jackson Data Binding Source Code

Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

  • Jackson Data Binding module allows you to converts JSON to and from POJO (Plain Old Java Object) using property accessor or using annotations.
  • 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:

    ✍: FYIcenter.com

    com/fasterxml/jackson/databind/deser/impl/ManagedReferenceProperty.java

    package com.fasterxml.jackson.databind.deser.impl;
    
    import java.io.IOException;
    import java.util.Collection;
    import java.util.Map;
    
    import com.fasterxml.jackson.core.JsonParser;
    import com.fasterxml.jackson.databind.*;
    import com.fasterxml.jackson.databind.deser.SettableBeanProperty;
    
    /**
     * Wrapper property that is used to handle managed (forward) properties
     * Basically just needs to delegate first to actual forward property, and
     * then to back property.
     */
    public final class ManagedReferenceProperty
        // Changed to extends delegating base class in 2.9
        extends SettableBeanProperty.Delegating
    {
        private static final long serialVersionUID = 1L;
    
        protected final String _referenceName;
    
        /**
         * Flag that indicates whether property to handle is a container type
         * (array, Collection, Map) or not.
         */
        protected final boolean _isContainer;
    
        protected final SettableBeanProperty _backProperty;
    
        public ManagedReferenceProperty(SettableBeanProperty forward, String refName,
                SettableBeanProperty backward, boolean isContainer)
        {
            super(forward);
            _referenceName = refName;
            _backProperty = backward;
            _isContainer = isContainer;
        }
    
        @Override
        protected SettableBeanProperty withDelegate(SettableBeanProperty d) {
            throw new IllegalStateException("Should never try to reset delegate");
        }
    
        // need to override to ensure both get fixed
        @Override
        public void fixAccess(DeserializationConfig config) {
            delegate.fixAccess(config);
            _backProperty.fixAccess(config);
        }
    
        /*
        /**********************************************************
        /* Overridden methods
        /**********************************************************
         */
    
        @Override
        public void deserializeAndSet(JsonParser p, DeserializationContext ctxt, Object instance)
                throws IOException {
            set(instance, delegate.deserialize(p, ctxt));
        }
    
        @Override
        public Object deserializeSetAndReturn(JsonParser p, DeserializationContext ctxt, Object instance)
                throws IOException {
            return setAndReturn(instance, deserialize(p, ctxt));
        }
        
        @Override
        public final void set(Object instance, Object value) throws IOException {
            setAndReturn(instance, value);
        }
    
        @Override
        public Object setAndReturn(Object instance, Object value) throws IOException
        {
            /* 04-Feb-2014, tatu: As per [#390], it may be necessary to switch the
             *   ordering of forward/backward references, and start with back ref.
             */
            if (value != null) {
                if (_isContainer) { // ok, this gets ugly... but has to do for now
                    if (value instanceof Object[]) {
                        for (Object ob : (Object[]) value) {
                            if (ob != null) { _backProperty.set(ob, instance); }
                        }
                    } else if (value instanceof Collection<?>) {
                        for (Object ob : (Collection<?>) value) {
                            if (ob != null) { _backProperty.set(ob, instance); }
                        }
                    } else if (value instanceof Map<?,?>) {
                        for (Object ob : ((Map<?,?>) value).values()) {
                            if (ob != null) { _backProperty.set(ob, instance); }
                        }
                    } else {
                        throw new IllegalStateException("Unsupported container type ("+value.getClass().getName()
                                +") when resolving reference '"+_referenceName+"'");
                    }
                } else {
                    _backProperty.set(value, instance);
                }
            }
            // and then the forward reference itself
            return delegate.setAndReturn(instance, value);
    	}
    }
    

    com/fasterxml/jackson/databind/deser/impl/ManagedReferenceProperty.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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