com.fasterxml.jackson.databind.deser.std

Class JsonNodeDeserializer

    • Constructor Detail

      • JsonNodeDeserializer

        protected JsonNodeDeserializer()
    • Method Detail

      • getDeserializer

        public static JsonDeserializer<? extends JsonNode> getDeserializer(Class<?> nodeClass)
        Factory method for accessing deserializer for specific node type
      • getNullValue

        public JsonNode getNullValue()
        Description copied from class: JsonDeserializer
        Method that can be called to determine value to be used for representing null values (values deserialized when JSON token is JsonToken.VALUE_NULL). Usually this is simply Java null, but for some types (especially primitives) it may be necessary to use non-null values.

        Note that deserializers are allowed to call this just once and then reuse returned value; that is, method is not guaranteed to be called once for each conversion.

        Default implementation simply returns null.

        Overrides:
        getNullValue in class JsonDeserializer<JsonNode>
      • deserialize

        public JsonNode deserialize(com.fasterxml.jackson.core.JsonParser jp,
                           DeserializationContext ctxt)
                             throws IOException,
                                    com.fasterxml.jackson.core.JsonProcessingException
        Implementation that will produce types of any JSON nodes; not just one deserializer is registered to handle (in case of more specialized handler). Overridden by typed sub-classes for more thorough checking
        Specified by:
        deserialize in class JsonDeserializer<JsonNode>
        Parameters:
        jp - Parsed used for reading JSON content
        ctxt - Context that can be used to access information about this deserialization activity.
        Returns:
        Deserialized value
        Throws:
        IOException
        com.fasterxml.jackson.core.JsonProcessingException
      • deserializeWithType

        public Object deserializeWithType(com.fasterxml.jackson.core.JsonParser jp,
                                 DeserializationContext ctxt,
                                 TypeDeserializer typeDeserializer)
                                   throws IOException,
                                          com.fasterxml.jackson.core.JsonProcessingException
        Description copied from class: StdDeserializer
        Base implementation that does not assume specific type inclusion mechanism. Sub-classes are expected to override this method if they are to handle type information.
        Overrides:
        deserializeWithType in class StdDeserializer<T extends JsonNode>
        typeDeserializer - Deserializer to use for handling type information
        Throws:
        IOException
        com.fasterxml.jackson.core.JsonProcessingException
      • _handleDuplicateField

        @Deprecated
        protected void _handleDuplicateField(String fieldName,
                                            ObjectNode objectNode,
                                            JsonNode oldValue,
                                            JsonNode newValue)
                                      throws com.fasterxml.jackson.core.JsonProcessingException
        Deprecated. Since 2.3, use the overloaded variant
        Throws:
        com.fasterxml.jackson.core.JsonProcessingException
      • _handleDuplicateField

        protected void _handleDuplicateField(com.fasterxml.jackson.core.JsonParser jp,
                                 DeserializationContext ctxt,
                                 JsonNodeFactory nodeFactory,
                                 String fieldName,
                                 ObjectNode objectNode,
                                 JsonNode oldValue,
                                 JsonNode newValue)
                                      throws com.fasterxml.jackson.core.JsonProcessingException
        Method called when there is a duplicate value for a field. By default we don't care, and the last value is used. Can be overridden to provide alternate handling, such as throwing an exception, or choosing different strategy for combining values or choosing which one to keep.
        Parameters:
        fieldName - Name of the field for which duplicate value was found
        objectNode - Object node that contains values
        oldValue - Value that existed for the object node before newValue was added
        newValue - Newly added value just added to the object node
        Throws:
        com.fasterxml.jackson.core.JsonProcessingException

Copyright © 2012-2013 FasterXML. All Rights Reserved.