com.fasterxml.jackson.databind.deser.std

类 EnumDeserializer

java.lang.Object

com.fasterxml.jackson.databind.JsonDeserializer<T>

com.fasterxml.jackson.databind.deser.std.StdDeserializer<T>

com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer<Object>

com.fasterxml.jackson.databind.deser.std.EnumDeserializer

所有已实现的接口:

com.fasterxml.jackson.databind.deser.ContextualDeserializer, com.fasterxml.jackson.databind.deser.NullValueProvider, com.fasterxml.jackson.databind.deser.ValueInstantiator.Gettable, Serializable

public class EnumDeserializer
extends com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer<Object>
implements com.fasterxml.jackson.databind.deser.ContextualDeserializer

枚举类反序列化程序类，可以从字符串和整数反序列化指定枚举类的实例。 官方提供的，支持（但不限于）以下接收方式： 1、字符串 如：sex: "M" 2、数字 如：sex: 1 // 数字需要和枚举类的顺序对应，超过会报错。 如Sex 有M、W、N ，则数字只能是 0、1、2 3、数组 还不清楚怎么使用...

我重写了后，增强了以下功能。 1、传递的枚举类型可以是对象. 如： sex: { "code": "M" }

本类跟jackson-databind包中的EnumDeserializer类同包名，利用类加载机制，会加载此类，不会加载到jackson-databind中的类 参考 BasicDeserializerFactory#1495 行代码

版本:

3.2.1

作者:

zuihou

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 com.fasterxml.jackson.databind.JsonDeserializer

com.fasterxml.jackson.databind.JsonDeserializer.None

字段概要

字段

限定符和类型	字段和说明
protected Boolean	_caseInsensitive
protected Object[]	_enumsByIndex
protected com.fasterxml.jackson.databind.util.CompactStringObjectMap	_lookupByName
protected com.fasterxml.jackson.databind.util.CompactStringObjectMap	_lookupByToString Alternatively, we may need a different lookup object if "use toString" is defined.

从类继承的字段 com.fasterxml.jackson.databind.deser.std.StdDeserializer

_valueClass, _valueType, F_MASK_ACCEPT_ARRAYS, F_MASK_INT_COERCIONS

构造器概要

构造器

限定符	构造器和说明
protected	EnumDeserializer(EnumDeserializer base, Boolean caseInsensitive)
	EnumDeserializer(com.fasterxml.jackson.databind.util.EnumResolver byNameResolver) 已过时。 Since 2.9
	EnumDeserializer(com.fasterxml.jackson.databind.util.EnumResolver byNameResolver, Boolean caseInsensitive)

方法概要

限定符和类型	方法和说明
protected Object	_deserializeOther(com.fasterxml.jackson.core.JsonParser p, com.fasterxml.jackson.databind.DeserializationContext ctxt)
protected Class<?>	_enumClass()
protected Object	_fromInteger(com.fasterxml.jackson.core.JsonParser p, com.fasterxml.jackson.databind.DeserializationContext ctxt, int index)
protected Object	_fromString(com.fasterxml.jackson.core.JsonParser p, com.fasterxml.jackson.databind.DeserializationContext ctxt, String text)
protected com.fasterxml.jackson.databind.util.CompactStringObjectMap	_getToStringLookup(com.fasterxml.jackson.databind.DeserializationContext ctxt)
com.fasterxml.jackson.databind.JsonDeserializer<?>	createContextual(com.fasterxml.jackson.databind.DeserializationContext ctxt, com.fasterxml.jackson.databind.BeanProperty property)
Object	deserialize(com.fasterxml.jackson.core.JsonParser p, com.fasterxml.jackson.databind.DeserializationContext ctxt)
static com.fasterxml.jackson.databind.JsonDeserializer<?>	deserializerForCreator(com.fasterxml.jackson.databind.DeserializationConfig config, Class<?> enumClass, com.fasterxml.jackson.databind.introspect.AnnotatedMethod factory) 已过时。 Since 2.8
static com.fasterxml.jackson.databind.JsonDeserializer<?>	deserializerForCreator(com.fasterxml.jackson.databind.DeserializationConfig config, Class<?> enumClass, com.fasterxml.jackson.databind.introspect.AnnotatedMethod factory, com.fasterxml.jackson.databind.deser.ValueInstantiator valueInstantiator, com.fasterxml.jackson.databind.deser.SettableBeanProperty[] creatorProps) Factory method used when Enum instances are to be deserialized using a creator (static factory method)
static com.fasterxml.jackson.databind.JsonDeserializer<?>	deserializerForNoArgsCreator(com.fasterxml.jackson.databind.DeserializationConfig config, Class<?> enumClass, com.fasterxml.jackson.databind.introspect.AnnotatedMethod factory) Factory method used when Enum instances are to be deserialized using a zero-/no-args factory method
Object	getEmptyValue(com.fasterxml.jackson.databind.DeserializationContext ctxt)
boolean	isCachable() Because of costs associated with constructing Enum resolvers, let's cache instances by default.
com.fasterxml.jackson.databind.type.LogicalType	logicalType()
EnumDeserializer	withResolved(Boolean caseInsensitive)

从类继承的方法 com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer

deserialize, deserializeWithType, getEmptyAccessPattern, getNullAccessPattern, supportsUpdate

从类继承的方法 com.fasterxml.jackson.databind.deser.std.StdDeserializer

_byteOverflow, _checkCoercionFail, _checkDoubleSpecialValue, _checkFloatSpecialValue, _checkFloatToIntCoercion, _checkFromStringCoercion, _checkFromStringCoercion, _checkTextualNull, _coerceBooleanFromInt, _coercedTypeDesc, _coerceEmptyString, _coerceIntegral, _coerceNullToken, _coerceTextualNull, _deserializeFromArray, _deserializeFromEmpty, _deserializeFromEmptyString, _deserializeFromString, _deserializeWrappedValue, _failDoubleToIntCoercion, _findCoercionFromBlankString, _findCoercionFromEmptyArray, _findCoercionFromEmptyString, _findNullProvider, _hasTextualNull, _intOverflow, _isBlank, _isEmptyOrTextualNull, _isFalse, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _isTrue, _neitherNull, _nonNullNumber, _parseBoolean, _parseBooleanFromInt, _parseBooleanPrimitive, _parseBooleanPrimitive, _parseBytePrimitive, _parseDate, _parseDate, _parseDateFromArray, _parseDouble, _parseDoublePrimitive, _parseDoublePrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseInteger, _parseInteger, _parseIntPrimitive, _parseIntPrimitive, _parseLong, _parseLong, _parseLongPrimitive, _parseLongPrimitive, _parseShortPrimitive, _parseString, _reportFailedNullCoerce, _shortOverflow, _verifyEndArrayForSingle, _verifyNullForPrimitive, _verifyNullForPrimitiveCoercion, _verifyNullForScalarCoercion, _verifyNumberForScalarCoercion, _verifyStringForScalarCoercion, findContentNullProvider, findContentNullStyle, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, findValueNullProvider, getValueClass, getValueInstantiator, getValueType, getValueType, handledType, handleMissingEndArrayForSingle, handleNestedArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer

从类继承的方法 com.fasterxml.jackson.databind.JsonDeserializer

deserializeWithType, findBackReference, getAbsentValue, getDelegatee, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializer

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

_lookupByName

protected final com.fasterxml.jackson.databind.util.CompactStringObjectMap _lookupByName

从以下版本开始:

2.7.3

_caseInsensitive

protected final Boolean _caseInsensitive

_enumsByIndex

protected Object[] _enumsByIndex

_lookupByToString

protected com.fasterxml.jackson.databind.util.CompactStringObjectMap _lookupByToString

Alternatively, we may need a different lookup object if "use toString" is defined.

从以下版本开始:

2.7.3

构造器详细资料

EnumDeserializer

public EnumDeserializer(com.fasterxml.jackson.databind.util.EnumResolver byNameResolver,
                        Boolean caseInsensitive)

从以下版本开始:

2.9

EnumDeserializer

protected EnumDeserializer(EnumDeserializer base,
                           Boolean caseInsensitive)

从以下版本开始:

2.9

EnumDeserializer

@Deprecated
public EnumDeserializer(com.fasterxml.jackson.databind.util.EnumResolver byNameResolver)

已过时。 Since 2.9

方法详细资料

deserializerForCreator

@Deprecated
public static com.fasterxml.jackson.databind.JsonDeserializer<?> deserializerForCreator(com.fasterxml.jackson.databind.DeserializationConfig config,
                                                                                                    Class<?> enumClass,
                                                                                                    com.fasterxml.jackson.databind.introspect.AnnotatedMethod factory)

已过时。 Since 2.8

deserializerForCreator

public static com.fasterxml.jackson.databind.JsonDeserializer<?> deserializerForCreator(com.fasterxml.jackson.databind.DeserializationConfig config,
                                                                                        Class<?> enumClass,
                                                                                        com.fasterxml.jackson.databind.introspect.AnnotatedMethod factory,
                                                                                        com.fasterxml.jackson.databind.deser.ValueInstantiator valueInstantiator,
                                                                                        com.fasterxml.jackson.databind.deser.SettableBeanProperty[] creatorProps)

Factory method used when Enum instances are to be deserialized using a creator (static factory method)

返回:

Deserializer based on given factory method

从以下版本开始:

2.8

deserializerForNoArgsCreator

public static com.fasterxml.jackson.databind.JsonDeserializer<?> deserializerForNoArgsCreator(com.fasterxml.jackson.databind.DeserializationConfig config,
                                                                                              Class<?> enumClass,
                                                                                              com.fasterxml.jackson.databind.introspect.AnnotatedMethod factory)

Factory method used when Enum instances are to be deserialized using a zero-/no-args factory method

返回:

Deserializer based on given no-args factory method

从以下版本开始:

2.8

withResolved

public EnumDeserializer withResolved(Boolean caseInsensitive)

从以下版本开始:

2.9

createContextual

public com.fasterxml.jackson.databind.JsonDeserializer<?> createContextual(com.fasterxml.jackson.databind.DeserializationContext ctxt,
                                                                           com.fasterxml.jackson.databind.BeanProperty property)
                                                                    throws com.fasterxml.jackson.databind.JsonMappingException

指定者:

createContextual 在接口中 com.fasterxml.jackson.databind.deser.ContextualDeserializer

抛出:

com.fasterxml.jackson.databind.JsonMappingException

isCachable

public boolean isCachable()

Because of costs associated with constructing Enum resolvers, let's cache instances by default.

覆盖:

isCachable 在类中 com.fasterxml.jackson.databind.JsonDeserializer<Object>

logicalType

public com.fasterxml.jackson.databind.type.LogicalType logicalType()

覆盖:

logicalType 在类中 com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer<Object>

getEmptyValue

public Object getEmptyValue(com.fasterxml.jackson.databind.DeserializationContext ctxt)
                     throws com.fasterxml.jackson.databind.JsonMappingException

覆盖:

getEmptyValue 在类中 com.fasterxml.jackson.databind.JsonDeserializer<Object>

抛出:

com.fasterxml.jackson.databind.JsonMappingException

deserialize

public Object deserialize(com.fasterxml.jackson.core.JsonParser p,
                          com.fasterxml.jackson.databind.DeserializationContext ctxt)
                   throws IOException

指定者:

deserialize 在类中 com.fasterxml.jackson.databind.JsonDeserializer<Object>

抛出:

IOException

_fromString

protected Object _fromString(com.fasterxml.jackson.core.JsonParser p,
                             com.fasterxml.jackson.databind.DeserializationContext ctxt,
                             String text)
                      throws IOException

抛出:

IOException

_fromInteger

protected Object _fromInteger(com.fasterxml.jackson.core.JsonParser p,
                              com.fasterxml.jackson.databind.DeserializationContext ctxt,
                              int index)
                       throws IOException

抛出:

IOException

_deserializeOther

protected Object _deserializeOther(com.fasterxml.jackson.core.JsonParser p,
                                   com.fasterxml.jackson.databind.DeserializationContext ctxt)
                            throws IOException

抛出:

IOException

_enumClass

protected Class<?> _enumClass()

_getToStringLookup

protected com.fasterxml.jackson.databind.util.CompactStringObjectMap _getToStringLookup(com.fasterxml.jackson.databind.DeserializationContext ctxt)