Field Detail

• USE_DEFAULT_NAME

  public static final String USE_DEFAULT_NAME

  Special value that indicates that handlers should use the default name (derived from method or field name) for property.

  Since:

  2.1

• INDEX_UNKNOWN

  public static final int INDEX_UNKNOWN

  Marker value used to indicate that no index has been specified. Used as the default value as annotations do not allow "missing" values.

  Since:

  2.4

Element Detail

• value

  public abstract String value

  Defines name of the logical property, i.e. JSON object field name to use for the property. If value is empty String (which is the default), will try to use name of the field that is annotated. Note that there is no default name available for constructor arguments, meaning that Empty String is not a valid value for constructor arguments.

  Default:

  ""

• required

  public abstract boolean required

  Property that indicates whether a value (which may be explicit null) is expected for property during deserialization or not. If expected, BeanDeserialized should indicate this as a validity problem (usually by throwing an exception, but this may be sent via problem handlers that can try to rectify the problem, for example, by supplying a default value).

  Note that as of 2.6, this property is only used for Creator Properties, to ensure existence of property value in JSON: for other properties (ones injected using a setter or mutable field), no validation is performed. Support for those cases may be added in future. State of this property is exposed via introspection, and its value is typically used by Schema generators, such as one for JSON Schema.

  Since:

  2.0

  Default:

  false

• index

  public abstract int index

  Property that indicates numerical index of this property (relative to other properties specified for the Object). This index is typically used by binary formats, but may also be useful for schema languages and other tools.

  Since:

  2.4

  Default:

  -1

• defaultValue

  public abstract String defaultValue

  Property that may be used to document expected default value for the property: most often used as source information for generating schemas (like JSON Schema or protobuf/thrift schema), or documentation. It may also be used by Jackson extension modules; core `jackson-databind` does not have any automated handling beyond simply exposing this value through bean property introspection.

  It is possible that in future this annotation could be used for value defaulting, and especially for default values of Creator properties, since they support required() in 2.6 and above.

  Since:

  2.5

  Default:

  ""

• access

  public abstract JsonProperty.Access access

  Optional property that may be used to change the way visibility of accessors (getter, field-as-getter) and mutators (constructor parameter, setter, field-as-setter) is determined, either so that otherwise non-visible accessors (like private getters) may be used; or that otherwise visible accessors are ignored.

  Default value os JsonProperty.Access.AUTO which means that access is determined solely based on visibility and other annotations.

  Since:

  2.6

  Default:

  com.fasterxml.jackson.annotation.JsonProperty.Access.AUTO