Package com.fasterxml.jackson.databind.ser.std

Class ToStringSerializer

java.lang.Object

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

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

com.fasterxml.jackson.databind.ser.std.ToStringSerializer

All Implemented Interfaces:

JsonFormatVisitable, SchemaAware, Serializable

public class ToStringSerializer
extends StdSerializer<Object>

Simple general purpose serializer, useful for any type for which Object.toString() returns the desired JSON value.

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	Description
static ToStringSerializer	instance	Singleton instance to use.

Fields inherited from class com.fasterxml.jackson.databind.ser.std.StdSerializer

_handledType

Constructor Summary

Constructors

Constructor	Description
ToStringSerializer()	Note: usually you should NOT create new instances, but instead use instance which is stateless and fully thread-safe.
ToStringSerializer(Class<?> handledType)	Sometimes it may actually make sense to retain actual handled type, so...

Method Summary

Modifier and Type	Method	Description
void	acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)	Default implementation specifies no format.
JsonNode	getSchema(SerializerProvider provider, Type typeHint)	Default implementation simply claims type is "string"; usually overriden by custom serializers.
boolean	isEmpty(SerializerProvider prov, Object value)	Method called to check whether given serializable value is considered "empty" value (for purposes of suppressing serialization of empty values).
void	serialize(Object value, com.fasterxml.jackson.core.JsonGenerator gen, SerializerProvider provider)	Method that can be called to ask implementation to serialize values of type this serializer handles.
void	serializeWithType(Object value, com.fasterxml.jackson.core.JsonGenerator g, SerializerProvider provider, TypeSerializer typeSer)	Default implementation will write type prefix, call regular serialization method (since assumption is that value itself does not need JSON Array or Object start/end markers), and then write type suffix.

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

getDelegatee, isEmpty, isUnwrappingSerializer, properties, replaceDelegatee, unwrappingSerializer, usesObjectId, withFilterId

Methods inherited from class java.lang.Object

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

Methods inherited from class com.fasterxml.jackson.databind.ser.std.StdSerializer

_neitherNull, _nonEmpty, createSchemaNode, createSchemaNode, findAnnotatedContentSerializer, findContextualConvertingSerializer, findConvertingContentSerializer, findFormatFeature, findFormatOverrides, findIncludeOverrides, findPropertyFilter, getSchema, handledType, isDefaultSerializer, visitArrayFormat, visitArrayFormat, visitFloatFormat, visitIntFormat, visitIntFormat, visitStringFormat, visitStringFormat, wrapAndThrow, wrapAndThrow

Field Detail

instance

public static final ToStringSerializer instance

Singleton instance to use.

Constructor Detail

ToStringSerializer

public ToStringSerializer()

Note: usually you should NOT create new instances, but instead use instance which is stateless and fully thread-safe. However, there are cases where constructor is needed; for example, when using explicit serializer annotations like JsonSerialize.using().

ToStringSerializer

public ToStringSerializer(Class<?> handledType)

Sometimes it may actually make sense to retain actual handled type, so...

Since:

2.5

Method Detail

isEmpty

public boolean isEmpty(SerializerProvider prov,
                       Object value)

Description copied from class: JsonSerializer

Method called to check whether given serializable value is considered "empty" value (for purposes of suppressing serialization of empty values).

Default implementation will consider only null values to be empty.

NOTE: replaces JsonSerializer.isEmpty(Object), which was deprecated in 2.5

Overrides:

isEmpty in class JsonSerializer<Object>

serialize

public void serialize(Object value,
                      com.fasterxml.jackson.core.JsonGenerator gen,
                      SerializerProvider provider)
               throws IOException

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 StdSerializer<Object>

Parameters:

value - Value to serialize; can not be null.

gen - 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

serializeWithType

public void serializeWithType(Object value,
                              com.fasterxml.jackson.core.JsonGenerator g,
                              SerializerProvider provider,
                              TypeSerializer typeSer)
                       throws IOException

Default implementation will write type prefix, call regular serialization method (since assumption is that value itself does not need JSON Array or Object start/end markers), and then write type suffix. This should work for most cases; some sub-classes may want to change this behavior.

Overrides:

serializeWithType in class JsonSerializer<Object>

Parameters:

value - Value to serialize; can not be null.

g - Generator used to output resulting Json content

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

typeSer - Type serializer to use for including type information

Throws:

IOException

getSchema

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

Description copied from class: StdSerializer

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

Specified by:

getSchema in interface SchemaAware

Overrides:

getSchema in class StdSerializer<Object>

Parameters:

provider - The serializer provider.

typeHint - A hint about the type.

Returns:

Json-schema for this serializer.

Throws:

JsonMappingException

acceptJsonFormatVisitor

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

Description copied from class: StdSerializer

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

Specified by:

acceptJsonFormatVisitor in interface JsonFormatVisitable

Overrides:

acceptJsonFormatVisitor in class StdSerializer<Object>

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

Throws:

JsonMappingException