com.fasterxml.jackson.databind.ser.std

Class StdSerializer<T>

java.lang.Object

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

com.fasterxml.jackson.databind.ser.std.StdSerializer<T>

All Implemented Interfaces:

JsonFormatVisitable, SchemaAware, Serializable

Direct Known Subclasses:

BeanSerializerBase, ContainerSerializer, CoreXMLSerializers.XMLGregorianCalendarSerializer, DOMSerializer, FailingSerializer, JsonValueSerializer, NullSerializer, RawSerializer, SerializableSerializer, StaticListSerializerBase, StdArraySerializers.ByteArraySerializer, StdArraySerializers.CharArraySerializer, StdDelegatingSerializer, StdJdkSerializers.AtomicReferenceSerializer, StdKeySerializer, StdKeySerializers.CalendarKeySerializer, StdKeySerializers.DateKeySerializer, StdKeySerializers.StringKeySerializer, StdScalarSerializer, TokenBufferSerializer, ToStringSerializer, UnknownSerializer

public abstract class StdSerializer<T>
extends JsonSerializer<T>
implements JsonFormatVisitable, SchemaAware, Serializable

Base class used by all standard serializers, and can also be used for custom serializers (in fact, this is the recommended base class to use). Provides convenience methods for implementing SchemaAware

See Also:

Serialized Form

Nested Class Summary

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

JsonSerializer.None

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<T>	_handledType Nominal type supported, usually declared type of property for which serializer is used.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	StdSerializer(Class<?> t, boolean dummy) Alternate constructor that is (alas!) needed to work around kinks of generic type handling
protected	StdSerializer(Class<T> t)
protected	StdSerializer(JavaType type)

Method Summary

Methods

Modifier and Type	Method and Description
void	acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) Default implementation specifies no format.
protected ObjectNode	createObjectNode()
protected ObjectNode	createSchemaNode(String type)
protected ObjectNode	createSchemaNode(String type, boolean isOptional)
protected JsonSerializer<?>	findConvertingContentSerializer(SerializerProvider provider, BeanProperty prop, JsonSerializer<?> existingSerializer) Helper method that can be used to see if specified property has annotation indicating that a converter is to be used for contained values (contents of structured types; array/List/Map values)
protected PropertyFilter	findPropertyFilter(SerializerProvider provider, Object filterId, Object valueToFilter) Helper method used to locate filter that is needed, based on filter id this serializer was constructed with.
JsonNode	getSchema(SerializerProvider provider, Type typeHint) Default implementation simply claims type is "string"; usually overriden by custom serializers.
JsonNode	getSchema(SerializerProvider provider, Type typeHint, boolean isOptional) Default implementation simply claims type is "string"; usually overriden by custom serializers.
Class<T>	handledType() Method for accessing type of Objects this serializer can handle.
protected boolean	isDefaultSerializer(JsonSerializer<?> serializer) Method that can be called to determine if given serializer is the default serializer Jackson uses; as opposed to a custom serializer installed by a module or calling application.
abstract void	serialize(T value, com.fasterxml.jackson.core.JsonGenerator jgen, SerializerProvider provider) Method that can be called to ask implementation to serialize values of type this serializer handles.
void	wrapAndThrow(SerializerProvider provider, Throwable t, Object bean, int index)
void	wrapAndThrow(SerializerProvider provider, Throwable t, Object bean, String fieldName) Method that will modify caught exception (passed in as argument) as necessary to include reference information, and to ensure it is a subtype of IOException, or an unchecked exception.

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

getDelegatee, isEmpty, isEmpty, isUnwrappingSerializer, replaceDelegatee, serializeWithType, unwrappingSerializer, usesObjectId

Methods inherited from class java.lang.Object

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

Field Detail

_handledType

protected final Class<T> _handledType

Nominal type supported, usually declared type of property for which serializer is used.

Constructor Detail

StdSerializer

protected StdSerializer(Class<T> t)

StdSerializer

protected StdSerializer(JavaType type)

StdSerializer

protected StdSerializer(Class<?> t,
             boolean dummy)

Alternate constructor that is (alas!) needed to work around kinks of generic type handling

Method Detail

handledType

public Class<T> handledType()

Description copied from class: JsonSerializer

Method for accessing type of Objects this serializer can handle. Note that this information is not guaranteed to be exact -- it may be a more generic (super-type) -- but it should not be incorrect (return a non-related type).

Default implementation will return null, which essentially means same as returning Object.class would; that is, that nothing is known about handled type.

Overrides:

handledType in class JsonSerializer<T>

serialize

public abstract void serialize(T value,
             com.fasterxml.jackson.core.JsonGenerator jgen,
             SerializerProvider provider)
                        throws IOException,
                               com.fasterxml.jackson.core.JsonGenerationException

Description copied from class: JsonSerializer

Method that can be called to ask implementation to serialize values of type this serializer handles.

Specified by:

serialize in class JsonSerializer<T>

Parameters:

value - Value to serialize; can not be null.

jgen - Generator used to output resulting Json content

provider - Provider that can be used to get serializers for serializing Objects value contains, if any.

Throws:

IOException

com.fasterxml.jackson.core.JsonGenerationException

getSchema

public JsonNode getSchema(SerializerProvider provider,
                 Type typeHint)
                   throws JsonMappingException

Default implementation simply claims type is "string"; usually overriden by custom serializers.

Specified by:

getSchema in interface SchemaAware

Parameters:

provider - The serializer provider.

typeHint - A hint about the type.

Returns:

Json-schema for this serializer.

Throws:

JsonMappingException

getSchema

public JsonNode getSchema(SerializerProvider provider,
                 Type typeHint,
                 boolean isOptional)
                   throws JsonMappingException

Default implementation simply claims type is "string"; usually overriden by custom serializers.

Specified by:

getSchema in interface SchemaAware

Parameters:

provider - The serializer provider.

typeHint - A hint about the type.

isOptional - Is the type optional

Returns:

Json-schema for this serializer.

Throws:

JsonMappingException

createObjectNode

protected ObjectNode createObjectNode()

createSchemaNode

protected ObjectNode createSchemaNode(String type)

createSchemaNode

protected ObjectNode createSchemaNode(String type,
                          boolean isOptional)

acceptJsonFormatVisitor

public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor,
                           JavaType typeHint)
                             throws JsonMappingException

Default implementation specifies no format. This behavior is usually overriden by custom serializers.

Specified by:

acceptJsonFormatVisitor in interface JsonFormatVisitable

Overrides:

acceptJsonFormatVisitor in class JsonSerializer<T>

typeHint - Type of element (entity like property) being visited

Throws:

JsonMappingException

wrapAndThrow

public void wrapAndThrow(SerializerProvider provider,
                Throwable t,
                Object bean,
                String fieldName)
                  throws IOException

Method that will modify caught exception (passed in as argument) as necessary to include reference information, and to ensure it is a subtype of IOException, or an unchecked exception.

Rules for wrapping and unwrapping are bit complicated; essentially:

• Errors are to be passed as is (if uncovered via unwrapping)
• "Plain" IOExceptions (ones that are not of type JsonMappingException are to be passed as is

Throws:

IOException

wrapAndThrow

public void wrapAndThrow(SerializerProvider provider,
                Throwable t,
                Object bean,
                int index)
                  throws IOException

Throws:

IOException

isDefaultSerializer

protected boolean isDefaultSerializer(JsonSerializer<?> serializer)

Method that can be called to determine if given serializer is the default serializer Jackson uses; as opposed to a custom serializer installed by a module or calling application. Determination is done using JacksonStdImpl annotation on serializer class.

findConvertingContentSerializer

protected JsonSerializer<?> findConvertingContentSerializer(SerializerProvider provider,
                                                BeanProperty prop,
                                                JsonSerializer<?> existingSerializer)
                                                     throws JsonMappingException

Helper method that can be used to see if specified property has annotation indicating that a converter is to be used for contained values (contents of structured types; array/List/Map values)

Parameters:

existingSerializer - (optional) configured content serializer if one already exists.

Throws:

JsonMappingException

Since:

2.2

findPropertyFilter

protected PropertyFilter findPropertyFilter(SerializerProvider provider,
                                Object filterId,
                                Object valueToFilter)
                                     throws JsonMappingException

Helper method used to locate filter that is needed, based on filter id this serializer was constructed with.

Throws:

JsonMappingException

Since:

2.3