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/NullValueProvider.java

    package com.fasterxml.jackson.databind.deser;
    
    import com.fasterxml.jackson.databind.DeserializationContext;
    import com.fasterxml.jackson.databind.JsonMappingException;
    import com.fasterxml.jackson.databind.util.AccessPattern;
    
    /**
     * Helper interface implemented by classes that are to be used as
     * null providers during deserialization. Most importantly implemented by
     * {@link com.fasterxml.jackson.databind.JsonDeserializer} (as a mix-in
     * interface), but also by converters used to support more configurable
     * null replacement.
     *
     * @since 2.9
     */
    public interface NullValueProvider
    {
        /**
         * Method called to possibly convert incoming `null` token (read via
         * underlying streaming input source) into other value of type accessor
         * supports. May return `null`, or value compatible with type binding.
         *<p>
         * NOTE: if {@link #getNullAccessPattern()} returns `ALWAYS_NULL` or
         * `CONSTANT`, this method WILL NOT use provided `ctxt` and it may thus
         * be passed as `null`.
         */
        public Object getNullValue(DeserializationContext ctxt) throws JsonMappingException;
    
        /**
         * Accessor that may be used to determine if and when provider must be called to
         * access null replacement value.
         */
        public AccessPattern getNullAccessPattern(); 
    }
    

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

     

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    2022-03-29, 32123👍, 0💬