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-2.12.4-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/ContextualKeyDeserializer.java

    package com.fasterxml.jackson.databind.deser;
    
    import com.fasterxml.jackson.databind.*;
    
    /**
     * Add-on interface that {@link KeyDeserializer}s can implement to get a callback
     * that can be used to create contextual instances of key deserializer to use for
     * handling Map keys of supported type. This can be useful
     * for key deserializers that can be configured by annotations, or should otherwise
     * have differing behavior depending on what kind of Map property keys are being deserialized.
     */
    public interface ContextualKeyDeserializer
    {
        /**
         * Method called to see if a different (or differently configured) key deserializer
         * is needed to deserialize keys of specified Map property.
         * Note that instance that this method is called on is typically shared one and
         * as a result method should <b>NOT</b> modify this instance but rather construct
         * and return a new instance. This instance should only be returned as-is, in case
         * it is already suitable for use.
         * 
         * @param ctxt Deserialization context to access configuration, additional 
         *    deserializers that may be needed by this deserializer
         * @param property Method, field or constructor parameter that declared Map for which
         *   contextual instance will be used. Will not be available when deserializing root-level
         *   Map value; otherwise should not be null.
         * 
         * @return Key deserializer to use for deserializing keys specified Map property,
         *   may be this instance or a new instance.
         */
        public KeyDeserializer createContextual(DeserializationContext ctxt,
                BeanProperty property)
            throws JsonMappingException;
    }
    

    com/fasterxml/jackson/databind/deser/ContextualKeyDeserializer.java

     

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    2022-03-29, 31970👍, 0💬