public enum MapperFeature extends Enum<MapperFeature> implements ConfigFeature
ObjectMapper, and accessible (but not changeable)
 via ObjectReader and ObjectWriter (as well as
 through various convenience methods through context objects).
 Note that in addition to being only mutable via ObjectMapper,
 changes only take effect when done before any serialization or
 deserialization calls -- that is, caller must follow
 "configure-then-use" pattern.
| Enum Constant and Description | 
|---|
| ACCEPT_CASE_INSENSITIVE_ENUMSFeature that determines if Enum deserialization should be case sensitive or not. | 
| ACCEPT_CASE_INSENSITIVE_PROPERTIESFeature that will allow for more forgiving deserialization of incoming JSON. | 
| ACCEPT_CASE_INSENSITIVE_VALUESFeature that permits parsing some enumerated text-based value types but ignoring the case
 of the values on deserialization: for example, date/time type deserializers. | 
| ALLOW_COERCION_OF_SCALARSFeature that determines whether coercions from secondary representations are allowed
 for simple non-textual scalar types: numbers and booleans. | 
| ALLOW_EXPLICIT_PROPERTY_RENAMINGFeature that when enabled will allow explicitly named properties (i.e., fields or methods
 annotated with  JsonProperty("explicitName")) to
 be re-named by aPropertyNamingStrategy, if one is configured. | 
| ALLOW_FINAL_FIELDS_AS_MUTATORSFeature that determines whether member fields declared as 'final' may
 be auto-detected to be used mutators (used to change value of the logical
 property) or not. | 
| AUTO_DETECT_CREATORSFeature that determines whether "creator" methods are
 automatically detected by consider public constructors,
 and static single argument methods with name "valueOf". | 
| AUTO_DETECT_FIELDSFeature that determines whether non-static fields are recognized as
 properties. | 
| AUTO_DETECT_GETTERSFeature that determines whether regular "getter" methods are
 automatically detected based on standard Bean naming convention
 or not. | 
| AUTO_DETECT_IS_GETTERSFeature that determines whether "is getter" methods are
 automatically detected based on standard Bean naming convention
 or not. | 
| AUTO_DETECT_SETTERSFeature that determines whether "setter" methods are
 automatically detected based on standard Bean naming convention
 or not. | 
| BLOCK_UNSAFE_POLYMORPHIC_BASE_TYPESSetting that may be enabled to reconfigure default
  PolymorphicTypeValidatorused by legacyObjectMapper.enableDefaultTyping()methods as well as default used
 for annotation-based polymorphic handling so that it usesDefaultBaseTypeLimitingValidator. | 
| CAN_OVERRIDE_ACCESS_MODIFIERSFeature that determines whether method and field access
 modifier settings can be overridden when accessing
 properties. | 
| DEFAULT_VIEW_INCLUSIONFeature that determines whether properties that have no view
 annotations are included in JSON serialization views (see
  JsonViewfor more
 details on JSON Views). | 
| IGNORE_DUPLICATE_MODULE_REGISTRATIONSFeature that determines whether multiple registrations of same module
 should be ignored or not; if enabled, only the first registration call
 results in module being called, and possible duplicate calls are silently
 ignored; if disabled, no checking is done and all registration calls are
 dispatched to module. | 
| IGNORE_MERGE_FOR_UNMERGEABLESetting that determines what happens if an attempt is made to explicitly
 "merge" value of a property, where value does not support merging; either
 merging is skipped and new value is created ( true) or
 an exception is thrown (false). | 
| INFER_CREATOR_FROM_CONSTRUCTOR_PROPERTIESFeature that determines handling of  java.beans.ConstructorPropertiesannotation: when enabled, it is considered as alias ofJsonCreator, to mean that constructor
 should be considered a property-based Creator; when disabled, only constructor
 parameter name information is used, but constructor is NOT considered an explicit
 Creator (although may be discovered as one using other annotations or heuristics). | 
| INFER_PROPERTY_MUTATORSFeature that determines whether member mutators (fields and
 setters) may be "pulled in" even if they are not visible,
 as long as there is a visible accessor (getter or field) with same name. | 
| OVERRIDE_PUBLIC_ACCESS_MODIFIERSFeature that determines that forces call to
  AccessibleObject.setAccessible(java.lang.reflect.AccessibleObject[], boolean)even forpublicaccessors -- that is, even if no such call is
 needed from functionality perspective -- if call is allowed
 (that is,CAN_OVERRIDE_ACCESS_MODIFIERSis set to true). | 
| PROPAGATE_TRANSIENT_MARKERFeature that determines how  transientmodifier for fields
 is handled: if disabled, it is only taken to mean exclusion of the field
 as accessor; if true, it is taken to imply removal of the whole property. | 
| REQUIRE_SETTERS_FOR_GETTERSFeature that determines whether getters (getter methods)
 can be auto-detected if there is no matching mutator (setter,
 constructor parameter or field) or not: if set to true,
 only getters that match a mutator are auto-discovered; if
 false, all auto-detectable getters can be discovered. | 
| SORT_PROPERTIES_ALPHABETICALLYFeature that defines default property serialization order used
 for POJO fields (note: does not apply to  Mapserialization!):
 if enabled, default ordering is alphabetic (similar to
 howJsonPropertyOrder.alphabetic()works); if disabled, order is unspecified (based on what JDK gives
 us, which may be declaration order, but is not guaranteed). | 
| USE_ANNOTATIONSFeature that determines whether annotation introspection
 is used for configuration; if enabled, configured
  AnnotationIntrospectorwill be used: if disabled,
 no annotations are considered. | 
| USE_BASE_TYPE_AS_DEFAULT_IMPLFeature that specifies whether the declared base type of a polymorphic value
 is to be used as the "default" implementation, if no explicit default class
 is specified via  @JsonTypeInfo.defaultImplannotation. | 
| USE_GETTERS_AS_SETTERSFeature that determines whether otherwise regular "getter"
 methods (but only ones that handle Collections and Maps,
 not getters of other type)
 can be used for purpose of getting a reference to a Collection
 and Map to modify the property, without requiring a setter
 method. | 
| USE_STATIC_TYPINGFeature that determines whether the type detection for
 serialization should be using actual dynamic runtime type,
 or declared static type. | 
| USE_STD_BEAN_NAMINGFeature that may be enabled to enforce strict compatibility with
 Bean name introspection, instead of slightly different mechanism
 Jackson defaults to. | 
| USE_WRAPPER_NAME_AS_PROPERTY_NAMEFeature that can be enabled to make property names be
 overridden by wrapper name (usually detected with annotations
 as defined by  AnnotationIntrospector.findWrapperName(com.fasterxml.jackson.databind.introspect.Annotated). | 
| Modifier and Type | Method and Description | 
|---|---|
| boolean | enabledByDefault()Accessor for checking whether this feature is enabled by default. | 
| boolean | enabledIn(int flags)Convenience method for checking whether feature is enabled in given bitmask | 
| int | getMask()Returns bit mask for this feature instance | 
| static MapperFeature | valueOf(String name)Returns the enum constant of this type with the specified name. | 
| static MapperFeature[] | values()Returns an array containing the constants of this enum type, in
the order they are declared. | 
public static final MapperFeature USE_ANNOTATIONS
AnnotationIntrospector will be used: if disabled,
 no annotations are considered.
Feature is enabled by default.
public static final MapperFeature USE_GETTERS_AS_SETTERS
Note that such getters-as-setters methods have lower precedence than setters, so they are only used if no setter is found for the Map/Collection property.
Feature is enabled by default.
public static final MapperFeature PROPAGATE_TRANSIENT_MARKER
transient modifier for fields
 is handled: if disabled, it is only taken to mean exclusion of the field
 as accessor; if true, it is taken to imply removal of the whole property.
Feature is disabled by default, meaning that existence of `transient` for a field does not necessarily lead to ignoral of getters or setters but just ignoring the use of field for access.
public static final MapperFeature AUTO_DETECT_CREATORS
Note that this feature has lower precedence than per-class annotations, and is only used if there isn't more granular configuration available.
Feature is enabled by default.
public static final MapperFeature AUTO_DETECT_FIELDS
Note that this feature has lower precedence than per-class annotations, and is only used if there isn't more granular configuration available.
Feature is enabled by default.
public static final MapperFeature AUTO_DETECT_GETTERS
 Note that since version 1.3, this does NOT include
 "is getters" (see AUTO_DETECT_IS_GETTERS for details)
Note that this feature has lower precedence than per-class annotations, and is only used if there isn't more granular configuration available.
Feature is enabled by default.
public static final MapperFeature AUTO_DETECT_IS_GETTERS
Note that this feature has lower precedence than per-class annotations, and is only used if there isn't more granular configuration available.
Feature is enabled by default.
public static final MapperFeature AUTO_DETECT_SETTERS
Note that this feature has lower precedence than per-class annotations, and is only used if there isn't more granular configuration available.
Feature is enabled by default.
public static final MapperFeature REQUIRE_SETTERS_FOR_GETTERS
Feature is disabled by default.
public static final MapperFeature ALLOW_FINAL_FIELDS_AS_MUTATORS
Feature is enabled by default, for backwards compatibility reasons.
public static final MapperFeature INFER_PROPERTY_MUTATORS
Note that 'getters' are never inferred and need to be either visible (including bean-style naming) or explicitly annotated.
Feature is enabled by default.
public static final MapperFeature INFER_CREATOR_FROM_CONSTRUCTOR_PROPERTIES
java.beans.ConstructorProperties
 annotation: when enabled, it is considered as alias of
 JsonCreator, to mean that constructor
 should be considered a property-based Creator; when disabled, only constructor
 parameter name information is used, but constructor is NOT considered an explicit
 Creator (although may be discovered as one using other annotations or heuristics).
 Feature is mostly used to help inter-operability with frameworks like Lombok
 that may automatically generate ConstructorProperties annotation
 but without necessarily meaning that constructor should be used as Creator
 for deserialization.
Feature is enabled by default.
public static final MapperFeature CAN_OVERRIDE_ACCESS_MODIFIERS
AccessibleObject.setAccessible(java.lang.reflect.AccessibleObject[], boolean)
 may be called to enable access to otherwise unaccessible objects.
Note that this setting may have significant performance implications, since access override helps remove costly access checks on each and every Reflection access. If you are considering disabling this feature, be sure to verify performance consequences if usage is performance sensitive. Also note that performance effects vary between Java platforms (JavaSE vs Android, for example), as well as JDK versions: older versions seemed to have more significant performance difference.
Conversely, on some platforms, it may be necessary to disable this feature as platform does not allow such calls. For example, when developing Applets (or other Java code that runs on tightly restricted sandbox), it may be necessary to disable the feature regardless of performance effects.
Feature is enabled by default.
public static final MapperFeature OVERRIDE_PUBLIC_ACCESS_MODIFIERS
AccessibleObject.setAccessible(java.lang.reflect.AccessibleObject[], boolean) even for
 public accessors -- that is, even if no such call is
 needed from functionality perspective -- if call is allowed
 (that is, CAN_OVERRIDE_ACCESS_MODIFIERS is set to true).
 The main reason to enable this feature is possible performance
 improvement as JDK does not have to perform access checks; these
 checks are otherwise made for all accessors, including public ones,
 and may result in slower Reflection calls. Exact impact (if any)
 depends on Java platform (Java SE, Android) as well as JDK version.
Feature is enabled by default, for legacy reasons (it was the behavior until 2.6)
public static final MapperFeature USE_STATIC_TYPING
 This global default value can be overridden at class, method
 or field level by using JsonSerialize.typing() annotation
 property.
Feature is disabled by default which means that dynamic runtime types are used (instead of declared static types) for serialization.
public static final MapperFeature USE_BASE_TYPE_AS_DEFAULT_IMPL
@JsonTypeInfo.defaultImpl annotation.
Note that feature only has effect on deserialization of regular polymorphic properties: it does NOT affect non-polymorphic cases, and is unlikely to work with Default Typing.
Feature is disabled by default for backwards compatibility.
public static final MapperFeature DEFAULT_VIEW_INCLUSION
JsonView for more
 details on JSON Views).
 If enabled, non-annotated properties will be included;
 when disabled, they will be excluded. So this feature
 changes between "opt-in" (feature disabled) and
 "opt-out" (feature enabled) modes.
 Default value is enabled, meaning that non-annotated
 properties are included in all views if there is no
 JsonView annotation.
Feature is enabled by default.
public static final MapperFeature SORT_PROPERTIES_ALPHABETICALLY
Map
 serialization!):
 if enabled, default ordering is alphabetic (similar to
 how JsonPropertyOrder.alphabetic()
 works); if disabled, order is unspecified (based on what JDK gives
 us, which may be declaration order, but is not guaranteed).
 Note that this is just the default behavior, and can be overridden by
 explicit overrides in classes (for example with
 JsonPropertyOrder annotation)
Feature is disabled by default.
public static final MapperFeature ACCEPT_CASE_INSENSITIVE_PROPERTIES
Note that there is additional performance overhead since incoming property names need to be lower-cased before comparison, for cases where there are upper-case letters. Overhead for names that are already lower-case should be negligible.
Feature is disabled by default.
public static final MapperFeature ACCEPT_CASE_INSENSITIVE_ENUMS
Feature is disabled by default.
public static final MapperFeature ACCEPT_CASE_INSENSITIVE_VALUES
 Note, however, that regular Enum types follow ACCEPT_CASE_INSENSITIVE_ENUMS
 setting instead.
Feature is disabled by default.
public static final MapperFeature USE_WRAPPER_NAME_AS_PROPERTY_NAME
AnnotationIntrospector.findWrapperName(com.fasterxml.jackson.databind.introspect.Annotated).
 If enabled, all properties that have associated non-empty Wrapper
 name will use that wrapper name instead of property name.
 If disabled, wrapper name is only used for wrapping (if anything).
Feature is disabled by default.
public static final MapperFeature USE_STD_BEAN_NAMING
Feature is disabled by default for backwards compatibility purposes: earlier Jackson versions used Jackson's own mechanism.
public static final MapperFeature ALLOW_EXPLICIT_PROPERTY_RENAMING
JsonProperty("explicitName")) to
 be re-named by a PropertyNamingStrategy, if one is configured.
 Feature is disabled by default.
public static final MapperFeature ALLOW_COERCION_OF_SCALARS
When feature is disabled, only strictly compatible input may be bound: numbers for numbers, boolean values for booleans. When feature is enabled, conversions from JSON String are allowed, as long as textual value matches (for example, String "true" is allowed as equivalent of JSON boolean token `true`; or String "1.0" for `double`).
Note that it is possible that other configurability options can override this in closer scope (like on per-type or per-property basis); this is just the global default.
Feature is enabled by default (for backwards compatibility since this was the default behavior)
public static final MapperFeature IGNORE_DUPLICATE_MODULE_REGISTRATIONS
 Definition of "same module" is based on using Module.getTypeId();
 modules with same non-null type id are considered same for
 purposes of duplicate registration. This also avoids having to keep track
 of actual module instances; only ids will be kept track of (and only if
 this feature is enabled).
Feature is enabled by default.
public static final MapperFeature IGNORE_MERGE_FOR_UNMERGEABLE
true) or
 an exception is thrown (false).
Feature is enabled by default, to allow use of merge defaults even in presence of some unmergeable properties.
public static final MapperFeature BLOCK_UNSAFE_POLYMORPHIC_BASE_TYPES
PolymorphicTypeValidator
 used by legacy ObjectMapper.enableDefaultTyping() methods as well as default used
 for annotation-based polymorphic handling so that it uses
 DefaultBaseTypeLimitingValidator.
 This will block use of a set of "unsafe" base types such as Object
 through methods that do not require passing of explicit PolymorphicTypeValidator.
 It is still possible to override one used; this only affects default settings.
Enabling of this setting is strongly recommended.
Feature is disabled by default in 2.x for backwards compatibility reasons: it will become default setting (and feature likely removed) in 3.0.
public static MapperFeature[] values()
for (MapperFeature c : MapperFeature.values()) System.out.println(c);
public static MapperFeature valueOf(String name)
name - the name of the enum constant to be returned.IllegalArgumentException - if this enum type has no constant with the specified nameNullPointerException - if the argument is nullpublic boolean enabledByDefault()
ConfigFeatureenabledByDefault in interface ConfigFeaturepublic int getMask()
ConfigFeaturegetMask in interface ConfigFeaturepublic boolean enabledIn(int flags)
ConfigFeatureenabledIn in interface ConfigFeatureCopyright © 2008–2020 FasterXML. All rights reserved.