Package com.fasterxml.jackson.databind.module

Class SimpleDeserializers

  • All Implemented Interfaces:
    Deserializers, java.io.Serializable
    public class SimpleDeserializers
extends Deserializers.Base
implements 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 Maps and Collections 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

    • 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
        Overrides:
        findArrayDeserializer in class Deserializers.Base
        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

      • 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
        Overrides:
        findCollectionDeserializer in class Deserializers.Base
        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
        Overrides:
        findCollectionLikeDeserializer in class Deserializers.Base
        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

      • 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
        Overrides:
        findMapDeserializer in class Deserializers.Base
        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
        Overrides:
        findMapLikeDeserializer in class Deserializers.Base
        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

      • hasDeserializerFor

        public boolean hasDeserializerFor​(DeserializationConfig config,
                                  java.lang.Class<?> valueType)
        Description copied from interface: Deserializers
        Method that may be called to check whether this deserializer provider would provide deserializer for values of given type, without attempting to construct (and possibly fail in some cases) actual deserializer. Mostly needed to support validation of polymorphic type ids.

        Note: implementations should take care NOT to claim supporting types that they do not recognize as this could to incorrect assumption of safe support by caller.

        Method added in Jackson 2.13 now that Java 8 default implementations are available for use with interface definitions.

        Specified by:
        hasDeserializerFor in interface Deserializers