com.fasterxml.jackson.databind.module

## Class SimpleDeserializers

- java.lang.Object
- - com.fasterxml.jackson.databind.module.SimpleDeserializers

- All Implemented Interfaces:
    Deserializers, java.io.Serializable

      public class SimpleDeserializers
      extends java.lang.Object
      implements Deserializers, java.io.Serializable

  Simple implementation `Deserializers` which allows registration of deserializers based on raw (type erased class). It can work well for basic bean and scalar type deserializers, but is not a good fit for handling generic types (like `Map`s and `Collection`s or array types).

  Unlike `SimpleSerializers`, this class does not currently support generic mappings; all mappings must be to exact declared deserialization type.

  See Also:
    Serialized Form

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface com.fasterxml.jackson.databind.deser.Deserializers

      `Deserializers.Base`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected java.util.HashMap<ClassKey,JsonDeserializer<?>>` | `_classMappings`
    `protected boolean` | `_hasEnumDeserializer` Flag to help find "generic" enum deserializer, if one has been registered.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SimpleDeserializers()`
    `SimpleDeserializers(java.util.Map<java.lang.Class<?>,JsonDeserializer<?>> desers)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `<T> void` | `addDeserializer(java.lang.Class<T> forClass, JsonDeserializer<? extends T> deser)`
    `void` | `addDeserializers(java.util.Map<java.lang.Class<?>,JsonDeserializer<?>> desers)`
    `JsonDeserializer<?>` | `findArrayDeserializer(ArrayType type, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)` Method called to locate serializer for specified array type.
    `JsonDeserializer<?>` | `findBeanDeserializer(JavaType type, DeserializationConfig config, BeanDescription beanDesc)` Method called to locate deserializer for specified value type which does not belong to any other category (not an Enum, Collection, Map, Array, reference value or tree node)
    `JsonDeserializer<?>` | `findCollectionDeserializer(CollectionType type, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)` Method called to locate serializer for specified `Collection` (List, Set etc) type.
    `JsonDeserializer<?>` | `findCollectionLikeDeserializer(CollectionLikeType type, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)` Method called to locate serializer for specified "Collection-like" type (one that acts like `Collection` but does not implement it).
    `JsonDeserializer<?>` | `findEnumDeserializer(java.lang.Class<?> type, DeserializationConfig config, BeanDescription beanDesc)` Method called to locate deserializer for specified `Enum` type.
    `JsonDeserializer<?>` | `findMapDeserializer(MapType type, DeserializationConfig config, BeanDescription beanDesc, KeyDeserializer keyDeserializer, TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)` Method called to locate deserializer for specified `Map` type.
    `JsonDeserializer<?>` | `findMapLikeDeserializer(MapLikeType type, DeserializationConfig config, BeanDescription beanDesc, KeyDeserializer keyDeserializer, TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)` Method called to locate serializer for specified "Map-like" type (one that acts like `Map` but does not implement it).
    `JsonDeserializer<?>` | `findReferenceDeserializer(ReferenceType refType, DeserializationConfig config, BeanDescription beanDesc, TypeDeserializer contentTypeDeserializer, JsonDeserializer<?> contentDeserializer)` Method called to locate deserializer for value that is of referential type,
    `JsonDeserializer<?>` | `findTreeNodeDeserializer(java.lang.Class<? extends JsonNode> nodeType, DeserializationConfig config, BeanDescription beanDesc)` Method called to locate deserializer for specified JSON tree node type.

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### _classMappings

          protected java.util.HashMap<ClassKey,JsonDeserializer<?>> _classMappings

    - #### _hasEnumDeserializer

          protected boolean _hasEnumDeserializer

      Flag to help find "generic" enum deserializer, if one has been registered.
      Since:
        2.3

  - ### Constructor Detail

    - #### SimpleDeserializers

          public SimpleDeserializers()

    - #### SimpleDeserializers

          public SimpleDeserializers(java.util.Map<java.lang.Class<?>,JsonDeserializer<?>> desers)

      Since:
        2.1

  - ### Method Detail

    - #### addDeserializer

          public <T> void addDeserializer(java.lang.Class<T> forClass,
                                 JsonDeserializer<? extends T> deser)

    - #### addDeserializers

          public void addDeserializers(java.util.Map<java.lang.Class<?>,JsonDeserializer<?>> desers)

      Since:
        2.1

    - #### findArrayDeserializer

          public JsonDeserializer<?> findArrayDeserializer(ArrayType type,
                                                  DeserializationConfig config,
                                                  BeanDescription beanDesc,
                                                  TypeDeserializer elementTypeDeserializer,
                                                  JsonDeserializer<?> elementDeserializer)
                                                    throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate serializer for specified array type.

      Deserializer for element type may be passed, if configured explicitly at higher level (by annotations, typically), but usually are not. Type deserializer for element is passed if one is needed based on contextual information (annotations on declared element class; or on field or method type is associated with).

      Specified by:
        `findArrayDeserializer` in interface `Deserializers`
      Parameters:
        `type` - Type of array instances to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the enumeration type that contains class annotations and other information typically needed for building deserializers
        `elementTypeDeserializer` - If element type needs polymorphic type handling, this is the type information deserializer to use; should usually be used as is when constructing array deserializer.
        `elementDeserializer` - Deserializer to use for elements, if explicitly defined (by using annotations, for exmple). May be null, in which case it should be resolved here (or using `ResolvableDeserializer` callback)
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findBeanDeserializer

          public JsonDeserializer<?> findBeanDeserializer(JavaType type,
                                                 DeserializationConfig config,
                                                 BeanDescription beanDesc)
                                                   throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate deserializer for specified value type which does not belong to any other category (not an Enum, Collection, Map, Array, reference value or tree node)
      Specified by:
        `findBeanDeserializer` in interface `Deserializers`
      Parameters:
        `type` - Bean type to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the enumeration type that contains class annotations and other information typically needed for building deserializers
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findCollectionDeserializer

          public JsonDeserializer<?> findCollectionDeserializer(CollectionType type,
                                                       DeserializationConfig config,
                                                       BeanDescription beanDesc,
                                                       TypeDeserializer elementTypeDeserializer,
                                                       JsonDeserializer<?> elementDeserializer)
                                                         throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate serializer for specified `Collection` (List, Set etc) type.

      Deserializer for element type may be passed, if configured explicitly at higher level (by annotations, typically), but usually are not. Type deserializer for element is passed if one is needed based on contextual information (annotations on declared element class; or on field or method type is associated with).

      Specified by:
        `findCollectionDeserializer` in interface `Deserializers`
      Parameters:
        `type` - Type of collection instances to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the enumeration type that contains class annotations and other information typically needed for building deserializers
        `elementTypeDeserializer` - If element type needs polymorphic type handling, this is the type information deserializer to use; should usually be used as is when constructing array deserializer.
        `elementDeserializer` - Deserializer to use for elements, if explicitly defined (by using annotations, for exmple). May be null, in which case it should be resolved here (or using `ResolvableDeserializer` callback)
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findCollectionLikeDeserializer

          public JsonDeserializer<?> findCollectionLikeDeserializer(CollectionLikeType type,
                                                           DeserializationConfig config,
                                                           BeanDescription beanDesc,
                                                           TypeDeserializer elementTypeDeserializer,
                                                           JsonDeserializer<?> elementDeserializer)
                                                             throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate serializer for specified "Collection-like" type (one that acts like `Collection` but does not implement it).

      Deserializer for element type may be passed, if configured explicitly at higher level (by annotations, typically), but usually are not. Type deserializer for element is passed if one is needed based on contextual information (annotations on declared element class; or on field or method type is associated with).

      Specified by:
        `findCollectionLikeDeserializer` in interface `Deserializers`
      Parameters:
        `type` - Type of instances to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the enumeration type that contains class annotations and other information typically needed for building deserializers
        `elementTypeDeserializer` - If element type needs polymorphic type handling, this is the type information deserializer to use; should usually be used as is when constructing array deserializer.
        `elementDeserializer` - Deserializer to use for elements, if explicitly defined (by using annotations, for exmple). May be null, in which case it should be resolved here (or using `ResolvableDeserializer` callback)
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findEnumDeserializer

          public JsonDeserializer<?> findEnumDeserializer(java.lang.Class<?> type,
                                                 DeserializationConfig config,
                                                 BeanDescription beanDesc)
                                                   throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate deserializer for specified `Enum` type.
      Specified by:
        `findEnumDeserializer` in interface `Deserializers`
      Parameters:
        `type` - Type of `Enum` instances to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the enumeration type that contains class annotations and other information typically needed for building deserializers
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findTreeNodeDeserializer

          public JsonDeserializer<?> findTreeNodeDeserializer(java.lang.Class<? extends JsonNode> nodeType,
                                                     DeserializationConfig config,
                                                     BeanDescription beanDesc)
                                                       throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate deserializer for specified JSON tree node type.
      Specified by:
        `findTreeNodeDeserializer` in interface `Deserializers`
      Parameters:
        `nodeType` - Specific type of JSON tree nodes to deserialize (subtype of `JsonNode`)
        `config` - Configuration in effect
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findReferenceDeserializer

          public JsonDeserializer<?> findReferenceDeserializer(ReferenceType refType,
                                                      DeserializationConfig config,
                                                      BeanDescription beanDesc,
                                                      TypeDeserializer contentTypeDeserializer,
                                                      JsonDeserializer<?> contentDeserializer)
                                                        throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate deserializer for value that is of referential type,
      Specified by:
        `findReferenceDeserializer` in interface `Deserializers`
      Parameters:
        `refType` - Specific referential type to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the reference type that contains class annotations and other information typically needed for building deserializers
        `contentTypeDeserializer` - Possible type deserializer for referenced value
        `contentDeserializer` - Value deserializer to use for referenced value, if indicated by property annotation
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findMapDeserializer

          public JsonDeserializer<?> findMapDeserializer(MapType type,
                                                DeserializationConfig config,
                                                BeanDescription beanDesc,
                                                KeyDeserializer keyDeserializer,
                                                TypeDeserializer elementTypeDeserializer,
                                                JsonDeserializer<?> elementDeserializer)
                                                  throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate deserializer for specified `Map` type.

      Deserializer for element type may be passed, if configured explicitly at higher level (by annotations, typically), but usually are not. Type deserializer for element is passed if one is needed based on contextual information (annotations on declared element class; or on field or method type is associated with).

      Similarly, a `KeyDeserializer` may be passed, but this is only done if there is a specific configuration override (annotations) to indicate instance to use. Otherwise null is passed, and key deserializer needs to be obtained later during resolution (using `ResolvableDeserializer.resolve(com.fasterxml.jackson.databind.DeserializationContext)`).

      Specified by:
        `findMapDeserializer` in interface `Deserializers`
      Parameters:
        `type` - Type of `Map` instances to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the enumeration type that contains class annotations and other information typically needed for building deserializers
        `keyDeserializer` - Key deserializer use, if it is defined via annotations or other configuration; null if default key deserializer for key type can be used.
        `elementTypeDeserializer` - If element type needs polymorphic type handling, this is the type information deserializer to use; should usually be used as is when constructing array deserializer.
        `elementDeserializer` - Deserializer to use for elements, if explicitly defined (by using annotations, for exmple). May be null, in which case it should be resolved here (or using `ResolvableDeserializer` callback)
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`

    - #### findMapLikeDeserializer

          public JsonDeserializer<?> findMapLikeDeserializer(MapLikeType type,
                                                    DeserializationConfig config,
                                                    BeanDescription beanDesc,
                                                    KeyDeserializer keyDeserializer,
                                                    TypeDeserializer elementTypeDeserializer,
                                                    JsonDeserializer<?> elementDeserializer)
                                                      throws JsonMappingException

      Description copied from interface: `Deserializers`
      Method called to locate serializer for specified "Map-like" type (one that acts like `Map` but does not implement it).

      Deserializer for element type may be passed, if configured explicitly at higher level (by annotations, typically), but usually are not. Type deserializer for element is passed if one is needed based on contextual information (annotations on declared element class; or on field or method type is associated with).

      Similarly, a `KeyDeserializer` may be passed, but this is only done if there is a specific configuration override (annotations) to indicate instance to use. Otherwise null is passed, and key deserializer needs to be obtained later during resolution (using `ResolvableDeserializer.resolve(com.fasterxml.jackson.databind.DeserializationContext)`).

      Specified by:
        `findMapLikeDeserializer` in interface `Deserializers`
      Parameters:
        `type` - Type of `Map` instances to deserialize
        `config` - Configuration in effect
        `beanDesc` - Definition of the enumeration type that contains class annotations and other information typically needed for building deserializers
        `keyDeserializer` - Key deserializer use, if it is defined via annotations or other configuration; null if default key deserializer for key type can be used.
        `elementTypeDeserializer` - If element type needs polymorphic type handling, this is the type information deserializer to use; should usually be used as is when constructing array deserializer.
        `elementDeserializer` - Deserializer to use for elements, if explicitly defined (by using annotations, for exmple). May be null, in which case it should be resolved here (or using `ResolvableDeserializer` callback)
      Returns:
        Deserializer to use for the type; or null if this provider does not know how to construct it
      Throws:
        `JsonMappingException`