com.fasterxml.jackson.databind.ser

Class BasicSerializerFactory

java.lang.Object

com.fasterxml.jackson.databind.ser.SerializerFactory

com.fasterxml.jackson.databind.ser.BasicSerializerFactory

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

BeanSerializerFactory

public abstract class BasicSerializerFactory
extends SerializerFactory
implements Serializable

Factory class that can provide serializers for standard JDK classes, as well as custom classes that extend standard classes or implement one of "well-known" interfaces (such as Collection).

Since all the serializers are eagerly instantiated, and there is no additional introspection or customizability of these types, this factory is essentially stateless.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected static HashMap<String,JsonSerializer<?>>	_concrete Since these are all JDK classes, we shouldn't have to worry about ClassLoader used to load them.
protected static HashMap<String,Class<? extends JsonSerializer<?>>>	_concreteLazy Actually it may not make much sense to eagerly instantiate all kinds of serializers: so this Map actually contains class references, not instances
protected SerializerFactoryConfig	_factoryConfig Configuration settings for this factory; immutable instance (just like this factory), new version created via copy-constructor (fluent-style)

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BasicSerializerFactory(SerializerFactoryConfig config) We will provide default constructor to allow sub-classing, but make it protected so that no non-singleton instances of the class will be instantiated.

Method Summary

Modifier and Type	Method and Description
protected JsonSerializer<Object>	_findContentSerializer(SerializerProvider prov, Annotated a) Helper method called to try to find whether there is an annotation in the class that indicates content ("value") serializer to use.
protected JsonSerializer<Object>	_findKeySerializer(SerializerProvider prov, Annotated a) Helper method called to try to find whether there is an annotation in the class that indicates key serializer to use.
protected Class<?>	_verifyAsClass(Object src, String methodName, Class<?> noneClass)
protected JsonSerializer<?>	buildArraySerializer(SerializerProvider prov, ArrayType type, BeanDescription beanDesc, boolean staticTyping, TypeSerializer elementTypeSerializer, JsonSerializer<Object> elementValueSerializer) Helper method that handles configuration details when constructing serializers for Object[] (and subtypes, except for String).
ContainerSerializer<?>	buildCollectionSerializer(JavaType elemType, boolean staticTyping, TypeSerializer vts, JsonSerializer<Object> valueSerializer)
protected JsonSerializer<?>	buildCollectionSerializer(SerializerProvider prov, CollectionType type, BeanDescription beanDesc, boolean staticTyping, TypeSerializer elementTypeSerializer, JsonSerializer<Object> elementValueSerializer) Helper method that handles configuration details when constructing serializers for List types that support efficient by-index access
protected JsonSerializer<?>	buildContainerSerializer(SerializerProvider prov, JavaType type, BeanDescription beanDesc, boolean staticTyping)
protected JsonSerializer<?>	buildEnumSerializer(SerializationConfig config, JavaType type, BeanDescription beanDesc)
JsonSerializer<?>	buildEnumSetSerializer(JavaType enumType)
ContainerSerializer<?>	buildIndexedListSerializer(JavaType elemType, boolean staticTyping, TypeSerializer vts, JsonSerializer<Object> valueSerializer)
protected JsonSerializer<?>	buildIterableSerializer(SerializationConfig config, JavaType type, BeanDescription beanDesc, boolean staticTyping, JavaType valueType)
protected JsonSerializer<?>	buildIteratorSerializer(SerializationConfig config, JavaType type, BeanDescription beanDesc, boolean staticTyping, JavaType valueType)
protected JsonSerializer<?>	buildMapEntrySerializer(SerializationConfig config, JavaType type, BeanDescription beanDesc, boolean staticTyping, JavaType keyType, JavaType valueType)
protected JsonSerializer<?>	buildMapSerializer(SerializerProvider prov, MapType type, BeanDescription beanDesc, boolean staticTyping, JsonSerializer<Object> keySerializer, TypeSerializer elementTypeSerializer, JsonSerializer<Object> elementValueSerializer) Helper method that handles configuration details when constructing serializers for Map types.
JsonSerializer<Object>	createKeySerializer(SerializationConfig config, JavaType keyType, JsonSerializer<Object> defaultImpl) Method called to create serializer to use for serializing JSON property names (which must be output as JsonToken.FIELD_NAME) for Map that has specified declared key type, and is for specified property (or, if property is null, as root value)
abstract JsonSerializer<Object>	createSerializer(SerializerProvider prov, JavaType type) Method called to create (or, for immutable serializers, reuse) a serializer for given type.
TypeSerializer	createTypeSerializer(SerializationConfig config, JavaType baseType) Method called to construct a type serializer for values with given declared base type.
protected abstract Iterable<Serializers>	customSerializers()
protected Converter<Object,Object>	findConverter(SerializerProvider prov, Annotated a)
protected JsonSerializer<?>	findConvertingSerializer(SerializerProvider prov, Annotated a, JsonSerializer<?> ser) Helper method that will check whether given annotated entity (usually class, but may also be a property accessor) indicates that a Converter is to be used; and if so, to construct and return suitable serializer for it.
protected Object	findFilterId(SerializationConfig config, BeanDescription beanDesc) Method called to find filter that is configured to be used with bean serializer being built, if any.
protected JsonSerializer<?>	findOptionalStdSerializer(SerializerProvider prov, JavaType type, BeanDescription beanDesc, boolean staticTyping) Overridable method called after checking all other types.
protected JsonSerializer<?>	findSerializerByAddonType(SerializationConfig config, JavaType javaType, BeanDescription beanDesc, boolean staticTyping) Reflection-based serialized find method, which checks if given class implements one of recognized "add-on" interfaces.
protected JsonSerializer<?>	findSerializerByAnnotations(SerializerProvider prov, JavaType type, BeanDescription beanDesc) Method called to see if one of primary per-class annotations (or related, like implementing of JsonSerializable) determines the serializer to use.
protected JsonSerializer<?>	findSerializerByLookup(JavaType type, SerializationConfig config, BeanDescription beanDesc, boolean staticTyping) Method that will use fast lookup (and identity comparison) methods to see if we know serializer to use for given type.
protected JsonSerializer<?>	findSerializerByPrimaryType(SerializerProvider prov, JavaType type, BeanDescription beanDesc, boolean staticTyping) Method for checking if we can determine serializer to use based on set of known primary types, checking for set of known base types (exact matches having been compared against with findSerializerByLookup).
protected JsonSerializer<Object>	findSerializerFromAnnotation(SerializerProvider prov, Annotated a) Helper method called to check if a class or method has an annotation (@link com.fasterxml.jackson.databind.annotation.JsonSerialize#using) that tells the class to use for serialization.
protected Object	findSuppressableContentValue(SerializationConfig config, JavaType contentType, BeanDescription beanDesc) NOTE: although return type is left opaque, it really needs to be JsonInclude.Include for things to work as expected.
SerializerFactoryConfig	getFactoryConfig() Method for getting current SerializerFactoryConfig.
protected boolean	isIndexedList(Class<?> cls)
protected boolean	usesStaticTyping(SerializationConfig config, BeanDescription beanDesc, TypeSerializer typeSer) Helper method to check whether global settings and/or class annotations for the bean class indicate that static typing (declared types) should be used for properties.
SerializerFactory	withAdditionalKeySerializers(Serializers additional) Convenience method for creating a new factory instance with an additional key serializer provider.
SerializerFactory	withAdditionalSerializers(Serializers additional) Convenience method for creating a new factory instance with an additional serializer provider.
abstract SerializerFactory	withConfig(SerializerFactoryConfig config) Method used for creating a new instance of this factory, but with different configuration.
SerializerFactory	withSerializerModifier(BeanSerializerModifier modifier) Convenience method for creating a new factory instance with additional bean serializer modifier.

Methods inherited from class java.lang.Object

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

Field Detail

_concrete

protected static final HashMap<String,JsonSerializer<?>> _concrete

Since these are all JDK classes, we shouldn't have to worry about ClassLoader used to load them. Rather, we can just use the class name, and keep things simple and efficient.

_concreteLazy

protected static final HashMap<String,Class<? extends JsonSerializer<?>>> _concreteLazy

Actually it may not make much sense to eagerly instantiate all kinds of serializers: so this Map actually contains class references, not instances

_factoryConfig

protected final SerializerFactoryConfig _factoryConfig

Configuration settings for this factory; immutable instance (just like this factory), new version created via copy-constructor (fluent-style)

Constructor Detail

BasicSerializerFactory

protected BasicSerializerFactory(SerializerFactoryConfig config)

We will provide default constructor to allow sub-classing, but make it protected so that no non-singleton instances of the class will be instantiated.

Method Detail

getFactoryConfig

public SerializerFactoryConfig getFactoryConfig()

Method for getting current SerializerFactoryConfig.

Note that since instances are immutable, you can NOT change settings by accessing an instance and calling methods: this will simply create new instance of config object.

withConfig

public abstract SerializerFactory withConfig(SerializerFactoryConfig 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 generally must override implementation of this method, as it usually requires instantiating a new instance of factory type. Check out javadocs for BeanSerializerFactory for more details.

withAdditionalSerializers

public final SerializerFactory withAdditionalSerializers(Serializers additional)

Convenience method for creating a new factory instance with an additional serializer provider.

Specified by:

withAdditionalSerializers in class SerializerFactory

withAdditionalKeySerializers

public final SerializerFactory withAdditionalKeySerializers(Serializers additional)

Convenience method for creating a new factory instance with an additional key serializer provider.

Specified by:

withAdditionalKeySerializers in class SerializerFactory

withSerializerModifier

public final SerializerFactory withSerializerModifier(BeanSerializerModifier modifier)

Convenience method for creating a new factory instance with additional bean serializer modifier.

Specified by:

withSerializerModifier in class SerializerFactory

createSerializer

public abstract JsonSerializer<Object> createSerializer(SerializerProvider prov,
                                                        JavaType type)
                                                 throws JsonMappingException

Description copied from class: SerializerFactory

Method called to create (or, for immutable serializers, reuse) a serializer for given type.

Specified by:

createSerializer in class SerializerFactory

Parameters:

prov - Provider that needs to be used to resolve annotation-provided serializers (but NOT for others)

Throws:

JsonMappingException

createKeySerializer

public JsonSerializer<Object> createKeySerializer(SerializationConfig config,
                                                  JavaType keyType,
                                                  JsonSerializer<Object> defaultImpl)

Description copied from class: SerializerFactory

Method called to create serializer to use for serializing JSON property names (which must be output as JsonToken.FIELD_NAME) for Map that has specified declared key type, and is for specified property (or, if property is null, as root value)

Specified by:

createKeySerializer in class SerializerFactory

keyType - Declared type for Map keys

defaultImpl - Default key serializer implementation to use, if no custom ones are found (may be null)

Returns:

Serializer to use, if factory knows it; null if not (in which case default serializer is to be used)

createTypeSerializer

public TypeSerializer createTypeSerializer(SerializationConfig config,
                                           JavaType baseType)

Method called to construct a type serializer for values with given declared base type. This is called for values other than those of bean property types.

Specified by:

createTypeSerializer in class SerializerFactory

baseType - Declared type to use as the base type for type information serializer

Returns:

Type serializer to use for the base type, if one is needed; null if not.

customSerializers

protected abstract Iterable<Serializers> customSerializers()

findSerializerByLookup

protected final JsonSerializer<?> findSerializerByLookup(JavaType type,
                                                         SerializationConfig config,
                                                         BeanDescription beanDesc,
                                                         boolean staticTyping)

Method that will use fast lookup (and identity comparison) methods to see if we know serializer to use for given type.

findSerializerByAnnotations

protected final JsonSerializer<?> findSerializerByAnnotations(SerializerProvider prov,
                                                              JavaType type,
                                                              BeanDescription beanDesc)
                                                       throws JsonMappingException

Method called to see if one of primary per-class annotations (or related, like implementing of JsonSerializable) determines the serializer to use.

Currently handles things like:

• If type implements JsonSerializable, use that
• If type has JsonValue annotation (or equivalent), build serializer based on that property

Throws:

JsonMappingException

Since:

2.0

findSerializerByPrimaryType

protected final JsonSerializer<?> findSerializerByPrimaryType(SerializerProvider prov,
                                                              JavaType type,
                                                              BeanDescription beanDesc,
                                                              boolean staticTyping)
                                                       throws JsonMappingException

Method for checking if we can determine serializer to use based on set of known primary types, checking for set of known base types (exact matches having been compared against with findSerializerByLookup). This does not include "secondary" interfaces, but mostly concrete or abstract base classes.

Throws:

JsonMappingException

findOptionalStdSerializer

protected JsonSerializer<?> findOptionalStdSerializer(SerializerProvider prov,
                                                      JavaType type,
                                                      BeanDescription beanDesc,
                                                      boolean staticTyping)
                                               throws JsonMappingException

Overridable method called after checking all other types.

Throws:

JsonMappingException

Since:

2.2

findSerializerByAddonType

protected final JsonSerializer<?> findSerializerByAddonType(SerializationConfig config,
                                                            JavaType javaType,
                                                            BeanDescription beanDesc,
                                                            boolean staticTyping)
                                                     throws JsonMappingException

Reflection-based serialized find method, which checks if given class implements one of recognized "add-on" interfaces. Add-on here means a role that is usually or can be a secondary trait: for example, bean classes may implement Iterable, but their main function is usually something else. The reason for

Throws:

JsonMappingException

findSerializerFromAnnotation

protected JsonSerializer<Object> findSerializerFromAnnotation(SerializerProvider prov,
                                                              Annotated a)
                                                       throws JsonMappingException

Helper method called to check if a class or method has an annotation (@link com.fasterxml.jackson.databind.annotation.JsonSerialize#using) that tells the class to use for serialization. Returns null if no such annotation found.

Throws:

JsonMappingException

findConvertingSerializer

protected JsonSerializer<?> findConvertingSerializer(SerializerProvider prov,
                                                     Annotated a,
                                                     JsonSerializer<?> ser)
                                              throws JsonMappingException

Helper method that will check whether given annotated entity (usually class, but may also be a property accessor) indicates that a Converter is to be used; and if so, to construct and return suitable serializer for it. If not, will simply return given serializer as is.

Throws:

JsonMappingException

findConverter

protected Converter<Object,Object> findConverter(SerializerProvider prov,
                                                 Annotated a)
                                          throws JsonMappingException

Throws:

JsonMappingException

buildContainerSerializer

protected JsonSerializer<?> buildContainerSerializer(SerializerProvider prov,
                                                     JavaType type,
                                                     BeanDescription beanDesc,
                                                     boolean staticTyping)
                                              throws JsonMappingException

Throws:

JsonMappingException

Since:

2.1

buildCollectionSerializer

protected JsonSerializer<?> buildCollectionSerializer(SerializerProvider prov,
                                                      CollectionType type,
                                                      BeanDescription beanDesc,
                                                      boolean staticTyping,
                                                      TypeSerializer elementTypeSerializer,
                                                      JsonSerializer<Object> elementValueSerializer)
                                               throws JsonMappingException

Helper method that handles configuration details when constructing serializers for List types that support efficient by-index access

Throws:

JsonMappingException

Since:

2.1

isIndexedList

protected boolean isIndexedList(Class<?> cls)

buildIndexedListSerializer

public ContainerSerializer<?> buildIndexedListSerializer(JavaType elemType,
                                                         boolean staticTyping,
                                                         TypeSerializer vts,
                                                         JsonSerializer<Object> valueSerializer)

buildCollectionSerializer

public ContainerSerializer<?> buildCollectionSerializer(JavaType elemType,
                                                        boolean staticTyping,
                                                        TypeSerializer vts,
                                                        JsonSerializer<Object> valueSerializer)

buildEnumSetSerializer

public JsonSerializer<?> buildEnumSetSerializer(JavaType enumType)

buildMapSerializer

protected JsonSerializer<?> buildMapSerializer(SerializerProvider prov,
                                               MapType type,
                                               BeanDescription beanDesc,
                                               boolean staticTyping,
                                               JsonSerializer<Object> keySerializer,
                                               TypeSerializer elementTypeSerializer,
                                               JsonSerializer<Object> elementValueSerializer)
                                        throws JsonMappingException

Helper method that handles configuration details when constructing serializers for Map types.

Throws:

JsonMappingException

findSuppressableContentValue

protected Object findSuppressableContentValue(SerializationConfig config,
                                              JavaType contentType,
                                              BeanDescription beanDesc)
                                       throws JsonMappingException

NOTE: although return type is left opaque, it really needs to be JsonInclude.Include for things to work as expected.

Throws:

JsonMappingException

Since:

2.5

buildArraySerializer

protected JsonSerializer<?> buildArraySerializer(SerializerProvider prov,
                                                 ArrayType type,
                                                 BeanDescription beanDesc,
                                                 boolean staticTyping,
                                                 TypeSerializer elementTypeSerializer,
                                                 JsonSerializer<Object> elementValueSerializer)
                                          throws JsonMappingException

Helper method that handles configuration details when constructing serializers for Object[] (and subtypes, except for String).

Throws:

JsonMappingException

buildIteratorSerializer

protected JsonSerializer<?> buildIteratorSerializer(SerializationConfig config,
                                                    JavaType type,
                                                    BeanDescription beanDesc,
                                                    boolean staticTyping,
                                                    JavaType valueType)
                                             throws JsonMappingException

Throws:

JsonMappingException

Since:

2.5

buildIterableSerializer

protected JsonSerializer<?> buildIterableSerializer(SerializationConfig config,
                                                    JavaType type,
                                                    BeanDescription beanDesc,
                                                    boolean staticTyping,
                                                    JavaType valueType)
                                             throws JsonMappingException

Throws:

JsonMappingException

Since:

2.5

buildMapEntrySerializer

protected JsonSerializer<?> buildMapEntrySerializer(SerializationConfig config,
                                                    JavaType type,
                                                    BeanDescription beanDesc,
                                                    boolean staticTyping,
                                                    JavaType keyType,
                                                    JavaType valueType)
                                             throws JsonMappingException

Throws:

JsonMappingException

Since:

2.5

buildEnumSerializer

protected JsonSerializer<?> buildEnumSerializer(SerializationConfig config,
                                                JavaType type,
                                                BeanDescription beanDesc)
                                         throws JsonMappingException

Throws:

JsonMappingException

_findKeySerializer

protected JsonSerializer<Object> _findKeySerializer(SerializerProvider prov,
                                                    Annotated a)
                                             throws JsonMappingException

Helper method called to try to find whether there is an annotation in the class that indicates key serializer to use. If so, will try to instantiate key serializer and return it; otherwise returns null.

Throws:

JsonMappingException

_findContentSerializer

protected JsonSerializer<Object> _findContentSerializer(SerializerProvider prov,
                                                        Annotated a)
                                                 throws JsonMappingException

Helper method called to try to find whether there is an annotation in the class that indicates content ("value") serializer to use. If so, will try to instantiate value serializer and return it; otherwise returns null.

Throws:

JsonMappingException

findFilterId

protected Object findFilterId(SerializationConfig config,
                              BeanDescription beanDesc)

Method called to find filter that is configured to be used with bean serializer being built, if any.

usesStaticTyping

protected boolean usesStaticTyping(SerializationConfig config,
                                   BeanDescription beanDesc,
                                   TypeSerializer typeSer)

Helper method to check whether global settings and/or class annotations for the bean class indicate that static typing (declared types) should be used for properties. (instead of dynamic runtime types).

Since:

2.1 (earlier had variant with additional 'property' parameter)

_verifyAsClass

protected Class<?> _verifyAsClass(Object src,
                                  String methodName,
                                  Class<?> noneClass)