com.fasterxml.jackson.databind.deser.std

Class EnumMapDeserializer

java.lang.Object

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

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

com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase<EnumMap<?,?>>

com.fasterxml.jackson.databind.deser.std.EnumMapDeserializer

All Implemented Interfaces:

ContextualDeserializer, Serializable

public class EnumMapDeserializer
extends ContainerDeserializerBase<EnumMap<?,?>>
implements ContextualDeserializer

Deserializer for EnumMap values.

Note: casting within this class is all messed up -- just could not figure out a way to properly deal with recursive definition of "EnumMap<K extends Enum<K>, V>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.JsonDeserializer

JsonDeserializer.None

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<?>	_enumClass
protected KeyDeserializer	_keyDeserializer
protected JavaType	_mapType
protected JsonDeserializer<Object>	_valueDeserializer
protected TypeDeserializer	_valueTypeDeserializer If value instances have polymorphic type information, this is the type deserializer that can handle it

Fields inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer

_valueClass, F_MASK_INT_COERCIONS

Constructor Summary

Constructors

Constructor and Description
EnumMapDeserializer(JavaType mapType, KeyDeserializer keyDeserializer, JsonDeserializer<?> valueDeser, TypeDeserializer valueTypeDeser)

Method Summary

Modifier and Type	Method and Description
protected EnumMap<?,?>	constructMap()
JsonDeserializer<?>	createContextual(DeserializationContext ctxt, BeanProperty property) Method called to finalize setup of this deserializer, when it is known for which property deserializer is needed for.
EnumMap<?,?>	deserialize(com.fasterxml.jackson.core.JsonParser jp, DeserializationContext ctxt) Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles.
Object	deserializeWithType(com.fasterxml.jackson.core.JsonParser jp, DeserializationContext ctxt, TypeDeserializer typeDeserializer) Base implementation that does not assume specific type inclusion mechanism.
JsonDeserializer<Object>	getContentDeserializer() Accesor for deserializer use for deserializing content values.
JavaType	getContentType() Accessor for declared type of contained value elements; either exact type, or one of its supertypes.
boolean	isCachable() Because of costs associated with constructing Enum resolvers, let's cache instances by default.
EnumMapDeserializer	withResolved(KeyDeserializer keyDeserializer, JsonDeserializer<?> valueDeserializer, TypeDeserializer valueTypeDeser)

Methods inherited from class com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase

findBackReference, wrapAndThrow

Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer

_coerceIntegral, _deserializeFromEmpty, _failDoubleToIntCoercion, _hasTextualNull, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _parseBoolean, _parseBooleanFromNumber, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, _parseString, findConvertingContentDeserializer, findDeserializer, getValueClass, getValueType, handledType, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble

Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer

deserialize, getDelegatee, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializer

Methods inherited from class java.lang.Object

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

Field Detail

_mapType

protected final JavaType _mapType

_enumClass

protected final Class<?> _enumClass

_keyDeserializer

protected KeyDeserializer _keyDeserializer

_valueDeserializer

protected JsonDeserializer<Object> _valueDeserializer

_valueTypeDeserializer

protected final TypeDeserializer _valueTypeDeserializer

If value instances have polymorphic type information, this is the type deserializer that can handle it

Constructor Detail

EnumMapDeserializer

public EnumMapDeserializer(JavaType mapType,
                           KeyDeserializer keyDeserializer,
                           JsonDeserializer<?> valueDeser,
                           TypeDeserializer valueTypeDeser)

Method Detail

withResolved

public EnumMapDeserializer withResolved(KeyDeserializer keyDeserializer,
                                        JsonDeserializer<?> valueDeserializer,
                                        TypeDeserializer valueTypeDeser)

createContextual

public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
                                            BeanProperty property)
                                     throws JsonMappingException

Method called to finalize setup of this deserializer, when it is known for which property deserializer is needed for.

Specified by:

createContextual in interface ContextualDeserializer

Parameters:

ctxt - Deserialization context to access configuration, additional deserializers that may be needed by this deserializer

property - Method, field or constructor parameter that represents the property (and is used to assign deserialized value). Should be available; but there may be cases where caller can not provide it and null is passed instead (in which case impls usually pass 'this' deserializer as is)

Returns:

Deserializer to use for deserializing values of specified property; may be this instance or a new instance.

Throws:

JsonMappingException

isCachable

public boolean isCachable()

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

Overrides:

isCachable in class JsonDeserializer<EnumMap<?,?>>

getContentType

public JavaType getContentType()

Description copied from class: ContainerDeserializerBase

Accessor for declared type of contained value elements; either exact type, or one of its supertypes.

Specified by:

getContentType in class ContainerDeserializerBase<EnumMap<?,?>>

getContentDeserializer

public JsonDeserializer<Object> getContentDeserializer()

Description copied from class: ContainerDeserializerBase

Accesor for deserializer use for deserializing content values.

Specified by:

getContentDeserializer in class ContainerDeserializerBase<EnumMap<?,?>>

deserialize

public EnumMap<?,?> deserialize(com.fasterxml.jackson.core.JsonParser jp,
                                DeserializationContext ctxt)
                         throws IOException

Description copied from class: JsonDeserializer

Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles. Returned instance is to be constructed by method itself.

Pre-condition for this method is that the parser points to the first event that is part of value to deserializer (and which is never JSON 'null' literal, more on this below): for simple types it may be the only value; and for structured types the Object start marker or a FIELD_NAME.

The two possible input conditions for structured types result from polymorphism via fields. In the ordinary case, Jackson calls this method when it has encountered an OBJECT_START, and the method implementation must advance to the next token to see the first field name. If the application configures polymorphism via a field, then the object looks like the following.

      {
          "@class": "class name",
          ...
      }
  

Jackson consumes the two tokens (the @class field name and its value) in order to learn the class and select the deserializer. Thus, the stream is pointing to the FIELD_NAME for the first field after the @class. Thus, if you want your method to work correctly both with and without polymorphism, you must begin your method with:

       if (jp.getCurrentToken() == JsonToken.START_OBJECT) {
         jp.nextToken();
       }
  

This results in the stream pointing to the field name, so that the two conditions align.

Post-condition is that the parser will point to the last event that is part of deserialized value (or in case deserialization fails, event that was not recognized or usable, which may be the same event as the one it pointed to upon call).

Note that this method is never called for JSON null literal, and thus deserializers need (and should) not check for it.

Specified by:

deserialize in class JsonDeserializer<EnumMap<?,?>>

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

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<EnumMap<?,?>>

typeDeserializer - Deserializer to use for handling type information

Throws:

IOException

com.fasterxml.jackson.core.JsonProcessingException

constructMap

protected EnumMap<?,?> constructMap()