Class NullSerializer

All Implemented Interfaces:
JsonFormatVisitable, SchemaAware, Serializable

public class NullSerializer extends StdSerializer<Object>
This is a simple dummy serializer that will just output literal JSON null value whenever serialization is requested. Used as the default "null serializer" (which is used for serializing null object references unless overridden), as well as for some more exotic types (java.lang.Void).
See Also:
  • Field Details

  • Method Details

    • serialize

      public void serialize(Object value, com.fasterxml.jackson.core.JsonGenerator gen, SerializerProvider provider) throws IOException
      Description copied from class: JsonSerializer
      Method that can be called to ask implementation to serialize values of type this serializer handles.
      Specified by:
      serialize in class StdSerializer<Object>
      Parameters:
      value - Value to serialize; can not be null.
      gen - Generator used to output resulting Json content
      provider - Provider that can be used to get serializers for serializing Objects value contains, if any.
      Throws:
      IOException
    • serializeWithType

      public void serializeWithType(Object value, com.fasterxml.jackson.core.JsonGenerator gen, SerializerProvider serializers, TypeSerializer typeSer) throws IOException
      Although this method should rarely get called, for convenience we should override it, and handle it same way as "natural" types: by serializing exactly as is, without type decorations. The most common possible use case is that of delegation by JSON filter; caller cannot know what kind of serializer it gets handed.
      Overrides:
      serializeWithType in class JsonSerializer<Object>
      Parameters:
      value - Value to serialize; can not be null.
      gen - Generator used to output resulting Json content
      serializers - Provider that can be used to get serializers for serializing Objects value contains, if any.
      typeSer - Type serializer to use for including type information
      Throws:
      IOException
    • getSchema

      @Deprecated public JsonNode getSchema(SerializerProvider provider, Type typeHint) throws JsonMappingException
      Deprecated.
      Since 2.15
      Description copied from class: StdSerializer
      Default implementation simply claims type is "string"; usually overriden by custom serializers.
      Specified by:
      getSchema in interface SchemaAware
      Overrides:
      getSchema in class StdSerializer<Object>
      Parameters:
      provider - The serializer provider.
      typeHint - A hint about the type.
      Returns:
      Json-schema for this serializer.
      Throws:
      JsonMappingException
    • acceptJsonFormatVisitor

      public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException
      Description copied from class: StdSerializer
      Default implementation specifies no format. This behavior is usually overriden by custom serializers.
      Specified by:
      acceptJsonFormatVisitor in interface JsonFormatVisitable
      Overrides:
      acceptJsonFormatVisitor in class StdSerializer<Object>
      Parameters:
      typeHint - Type of element (entity like property) being visited
      Throws:
      JsonMappingException