Package org.codehaus.jackson.map
Class DeserializerFactory
- java.lang.Object
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- org.codehaus.jackson.map.DeserializerFactory
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- Direct Known Subclasses:
BasicDeserializerFactory
public abstract class DeserializerFactory extends java.lang.Object
Abstract class that defines API used byDeserializerProvider
to obtain actualJsonDeserializer
instances from multiple distinct factories.Since there are multiple broad categories of deserializers, there are multiple factory methods:
- For JSON "Array" type, we need 2 methods: one to deal with expected
Java arrays (
createArrayDeserializer(org.codehaus.jackson.map.DeserializationConfig, org.codehaus.jackson.map.DeserializerProvider, org.codehaus.jackson.map.type.ArrayType, org.codehaus.jackson.map.BeanProperty)
) and the other for other Java containers likeList
s andSet
s (createCollectionDeserializer(DeserializationConfig, DeserializerProvider, CollectionType, BeanProperty)
) - For JSON "Object" type, we need 2 methods: one to deal with
expected Java
Map
s (createMapDeserializer(org.codehaus.jackson.map.DeserializationConfig, org.codehaus.jackson.map.DeserializerProvider, org.codehaus.jackson.map.type.MapType, org.codehaus.jackson.map.BeanProperty)
), and another for POJOs (createBeanDeserializer(DeserializationConfig, DeserializerProvider, JavaType, BeanProperty)
. - For Tree Model (
JsonNode
) properties there iscreateTreeDeserializer(DeserializationConfig, DeserializerProvider, JavaType, BeanProperty)
- For enumerated types (
Enum
) there iscreateEnumDeserializer(DeserializationConfig, DeserializerProvider, JavaType, BeanProperty)
- For all other types,
createBeanDeserializer(DeserializationConfig, DeserializerProvider, JavaType, BeanProperty)
is used.
All above methods take 2 type arguments, except for the first one which takes just a single argument.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
DeserializerFactory.Config
Configuration settings container class for bean deserializer factory
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Field Summary
Fields Modifier and Type Field Description protected static Deserializers[]
NO_DESERIALIZERS
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Constructor Summary
Constructors Constructor Description DeserializerFactory()
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description abstract JsonDeserializer<?>
createArrayDeserializer(DeserializationConfig config, DeserializerProvider p, ArrayType type, BeanProperty property)
Method called to create (or, for completely immutable deserializers, reuse) a deserializer that can convert JSON content into values of specified Java type.abstract JsonDeserializer<java.lang.Object>
createBeanDeserializer(DeserializationConfig config, DeserializerProvider p, JavaType type, BeanProperty property)
Method called to create (or, for completely immutable deserializers, reuse) a deserializer that can convert JSON content into values of specified Java "bean" (POJO) type.abstract JsonDeserializer<?>
createCollectionDeserializer(DeserializationConfig config, DeserializerProvider p, CollectionType type, BeanProperty property)
abstract JsonDeserializer<?>
createCollectionLikeDeserializer(DeserializationConfig config, DeserializerProvider p, CollectionLikeType type, BeanProperty property)
abstract JsonDeserializer<?>
createEnumDeserializer(DeserializationConfig config, DeserializerProvider p, JavaType type, BeanProperty property)
KeyDeserializer
createKeyDeserializer(DeserializationConfig config, JavaType type, BeanProperty property)
Method called to find if factory knows how to create a key deserializer for specified type; currently this means checking if a module has registered possible deserializers.abstract JsonDeserializer<?>
createMapDeserializer(DeserializationConfig config, DeserializerProvider p, MapType type, BeanProperty property)
abstract JsonDeserializer<?>
createMapLikeDeserializer(DeserializationConfig config, DeserializerProvider p, MapLikeType type, BeanProperty property)
abstract JsonDeserializer<?>
createTreeDeserializer(DeserializationConfig config, DeserializerProvider p, JavaType type, BeanProperty property)
Method called to create and return a deserializer that can construct JsonNode(s) from JSON content.TypeDeserializer
findTypeDeserializer(DeserializationConfig config, JavaType baseType, BeanProperty property)
Method called to find and create a type information deserializer for given base type, if one is needed.abstract ValueInstantiator
findValueInstantiator(DeserializationConfig config, BasicBeanDescription beanDesc)
Method that is to find all creators (constructors, factory methods) for the bean type to deserialize.abstract DeserializerFactory.Config
getConfig()
abstract JavaType
mapAbstractType(DeserializationConfig config, JavaType type)
Method that can be called to try to resolve an abstract type (interface, abstract class) into a concrete type, or at least something "more concrete" (abstract class instead of interface).DeserializerFactory
withAbstractTypeResolver(AbstractTypeResolver resolver)
Convenience method for creating a new factory instance with additionalAbstractTypeResolver
.DeserializerFactory
withAdditionalDeserializers(Deserializers additional)
Convenience method for creating a new factory instance with additional deserializer provider.DeserializerFactory
withAdditionalKeyDeserializers(KeyDeserializers additional)
Convenience method for creating a new factory instance with additionalKeyDeserializers
.abstract DeserializerFactory
withConfig(DeserializerFactory.Config config)
Method used for creating a new instance of this factory, but with different configuration.DeserializerFactory
withDeserializerModifier(BeanDeserializerModifier modifier)
Convenience method for creating a new factory instance with additionalBeanDeserializerModifier
.DeserializerFactory
withValueInstantiators(ValueInstantiators instantiators)
Convenience method for creating a new factory instance with additionalValueInstantiators
.
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Field Detail
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NO_DESERIALIZERS
protected static final Deserializers[] NO_DESERIALIZERS
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Method Detail
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getConfig
public abstract DeserializerFactory.Config getConfig()
- Since:
- 1.7
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withConfig
public abstract DeserializerFactory withConfig(DeserializerFactory.Config config)
Method used for creating a new instance of this factory, but with different configuration. Reason for specifying factory method (instead of plain constructor) is to allow proper sub-classing of factories.Note that custom sub-classes must override implementation of this method, as it usually requires instantiating a new instance of factory type. Check out javadocs for
BeanDeserializerFactory
for more details.- Since:
- 1.7
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withAdditionalDeserializers
public final DeserializerFactory withAdditionalDeserializers(Deserializers additional)
Convenience method for creating a new factory instance with additional deserializer provider.- Since:
- 1.7
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withAdditionalKeyDeserializers
public final DeserializerFactory withAdditionalKeyDeserializers(KeyDeserializers additional)
Convenience method for creating a new factory instance with additionalKeyDeserializers
.- Since:
- 1.8
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withDeserializerModifier
public final DeserializerFactory withDeserializerModifier(BeanDeserializerModifier modifier)
Convenience method for creating a new factory instance with additionalBeanDeserializerModifier
.- Since:
- 1.7
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withAbstractTypeResolver
public final DeserializerFactory withAbstractTypeResolver(AbstractTypeResolver resolver)
Convenience method for creating a new factory instance with additionalAbstractTypeResolver
.- Since:
- 1.7
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withValueInstantiators
public final DeserializerFactory withValueInstantiators(ValueInstantiators instantiators)
Convenience method for creating a new factory instance with additionalValueInstantiators
.- Since:
- 1.9
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mapAbstractType
public abstract JavaType mapAbstractType(DeserializationConfig config, JavaType type) throws JsonMappingException
Method that can be called to try to resolve an abstract type (interface, abstract class) into a concrete type, or at least something "more concrete" (abstract class instead of interface). Will either return passed type, or a more specific type.- Throws:
JsonMappingException
- Since:
- 1.9
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findValueInstantiator
public abstract ValueInstantiator findValueInstantiator(DeserializationConfig config, BasicBeanDescription beanDesc) throws JsonMappingException
Method that is to find all creators (constructors, factory methods) for the bean type to deserialize.- Throws:
JsonMappingException
- Since:
- 1.9
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createBeanDeserializer
public abstract JsonDeserializer<java.lang.Object> createBeanDeserializer(DeserializationConfig config, DeserializerProvider p, JavaType type, BeanProperty property) throws JsonMappingException
Method called to create (or, for completely immutable deserializers, reuse) a deserializer that can convert JSON content into values of specified Java "bean" (POJO) type. At this point it is known that the type is not otherwise recognized as one of structured types (array, Collection, Map) or a well-known JDK type (enum, primitives/wrappers, String); this method only gets called if other options are exhausted. This also means that this method can be overridden to add support for custom types.- Parameters:
type
- Type to be deserializedp
- Provider that can be called to create deserializers for contained member types- Throws:
JsonMappingException
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createArrayDeserializer
public abstract JsonDeserializer<?> createArrayDeserializer(DeserializationConfig config, DeserializerProvider p, ArrayType type, BeanProperty property) throws JsonMappingException
Method called to create (or, for completely immutable deserializers, reuse) a deserializer that can convert JSON content into values of specified Java type.- Parameters:
type
- Type to be deserializedp
- Provider that can be called to create deserializers for contained member types- Throws:
JsonMappingException
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createCollectionDeserializer
public abstract JsonDeserializer<?> createCollectionDeserializer(DeserializationConfig config, DeserializerProvider p, CollectionType type, BeanProperty property) throws JsonMappingException
- Throws:
JsonMappingException
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createCollectionLikeDeserializer
public abstract JsonDeserializer<?> createCollectionLikeDeserializer(DeserializationConfig config, DeserializerProvider p, CollectionLikeType type, BeanProperty property) throws JsonMappingException
- Throws:
JsonMappingException
- Since:
- 1.8
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createEnumDeserializer
public abstract JsonDeserializer<?> createEnumDeserializer(DeserializationConfig config, DeserializerProvider p, JavaType type, BeanProperty property) throws JsonMappingException
- Throws:
JsonMappingException
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createMapDeserializer
public abstract JsonDeserializer<?> createMapDeserializer(DeserializationConfig config, DeserializerProvider p, MapType type, BeanProperty property) throws JsonMappingException
- Throws:
JsonMappingException
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createMapLikeDeserializer
public abstract JsonDeserializer<?> createMapLikeDeserializer(DeserializationConfig config, DeserializerProvider p, MapLikeType type, BeanProperty property) throws JsonMappingException
- Throws:
JsonMappingException
- Since:
- 1.8
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createTreeDeserializer
public abstract JsonDeserializer<?> createTreeDeserializer(DeserializationConfig config, DeserializerProvider p, JavaType type, BeanProperty property) throws JsonMappingException
Method called to create and return a deserializer that can construct JsonNode(s) from JSON content.- Throws:
JsonMappingException
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createKeyDeserializer
public KeyDeserializer createKeyDeserializer(DeserializationConfig config, JavaType type, BeanProperty property) throws JsonMappingException
Method called to find if factory knows how to create a key deserializer for specified type; currently this means checking if a module has registered possible deserializers.- Returns:
- Key deserializer to use for specified type, if one found; null if not (and default key deserializer should be used)
- Throws:
JsonMappingException
- Since:
- 1.8
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findTypeDeserializer
public TypeDeserializer findTypeDeserializer(DeserializationConfig config, JavaType baseType, BeanProperty property) throws JsonMappingException
Method called to find and create a type information deserializer for given base type, if one is needed. If not needed (no polymorphic handling configured for type), should return null.Note that this method is usually only directly called for values of container (Collection, array, Map) types and root values, but not for bean property values.
- Parameters:
baseType
- Declared base type of the value to deserializer (actual deserializer type will be this type or its subtype)- Returns:
- Type deserializer to use for given base type, if one is needed; null if not.
- Throws:
JsonMappingException
- Since:
- 1.5
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