Class TypeSerializer

java.lang.Object

com.fasterxml.jackson.databind.jsontype.TypeSerializer

Direct Known Subclasses:

TypeSerializerBase

public abstract class TypeSerializer
extends Object

Interface for serializing type information regarding instances of specified base type (super class), so that exact subtype can be properly deserialized later on. These instances are to be called by regular JsonSerializers using proper contextual calls, to add type information using mechanism type serializer was configured with.

NOTE: version 2.9 contains significant attempt at simplifying interface, as well as giving format implementation (via JsonGenerator) more control over actual serialization details. Minor changes are required to change call pattern so that return value of "prefix" write needs to be passed to "suffix" write.

Constructor Summary

Constructors

Constructor	Description
TypeSerializer()

Method Summary

Modifier and Type	Method	Description
protected final void	_writeLegacySuffix(com.fasterxml.jackson.core.JsonGenerator g, com.fasterxml.jackson.core.type.WritableTypeId typeId)	Helper method needed for backwards compatibility: since original type id can not be routed through completely, we have to reverse-engineer likely setting before calling suffix.
abstract TypeSerializer	forProperty(BeanProperty prop)	Method called to create contextual version, to be used for values of given property.
abstract String	getPropertyName()	Name of property that contains type information, if property-based inclusion is used.
abstract TypeIdResolver	getTypeIdResolver()	Accessor for object that handles conversions between types and matching type ids.
abstract com.fasterxml.jackson.annotation.JsonTypeInfo.As	getTypeInclusion()	Accessor for type information inclusion method that serializer uses; indicates how type information is embedded in resulting JSON.
com.fasterxml.jackson.core.type.WritableTypeId	typeId(Object value, com.fasterxml.jackson.core.JsonToken valueShape)	Factory method for constructing type id value object to pass to writeTypePrefix(JsonGenerator, WritableTypeId).
com.fasterxml.jackson.core.type.WritableTypeId	typeId(Object value, com.fasterxml.jackson.core.JsonToken valueShape, Object id)
com.fasterxml.jackson.core.type.WritableTypeId	typeId(Object value, Class<?> typeForId, com.fasterxml.jackson.core.JsonToken valueShape)
void	writeCustomTypePrefixForArray(Object value, com.fasterxml.jackson.core.JsonGenerator g, String typeId)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeCustomTypePrefixForObject(Object value, com.fasterxml.jackson.core.JsonGenerator g, String typeId)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeCustomTypePrefixForScalar(Object value, com.fasterxml.jackson.core.JsonGenerator g, String typeId)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeCustomTypeSuffixForArray(Object value, com.fasterxml.jackson.core.JsonGenerator g, String typeId)	Deprecated. Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead
void	writeCustomTypeSuffixForObject(Object value, com.fasterxml.jackson.core.JsonGenerator g, String typeId)	Deprecated. Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead
void	writeCustomTypeSuffixForScalar(Object value, com.fasterxml.jackson.core.JsonGenerator g, String typeId)	Deprecated. Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead
abstract com.fasterxml.jackson.core.type.WritableTypeId	writeTypePrefix(com.fasterxml.jackson.core.JsonGenerator g, com.fasterxml.jackson.core.type.WritableTypeId typeId)	Method called to write initial part of type information for given value, along with possible wrapping to use: details are specified by `typeId` argument.
void	writeTypePrefixForArray(Object value, com.fasterxml.jackson.core.JsonGenerator g)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeTypePrefixForArray(Object value, com.fasterxml.jackson.core.JsonGenerator g, Class<?> type)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeTypePrefixForObject(Object value, com.fasterxml.jackson.core.JsonGenerator g)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeTypePrefixForObject(Object value, com.fasterxml.jackson.core.JsonGenerator g, Class<?> type)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeTypePrefixForScalar(Object value, com.fasterxml.jackson.core.JsonGenerator g)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
void	writeTypePrefixForScalar(Object value, com.fasterxml.jackson.core.JsonGenerator g, Class<?> type)	Deprecated. Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead
abstract com.fasterxml.jackson.core.type.WritableTypeId	writeTypeSuffix(com.fasterxml.jackson.core.JsonGenerator g, com.fasterxml.jackson.core.type.WritableTypeId typeId)	Method that should be called after writeTypePrefix(JsonGenerator, WritableTypeId) and matching value write have been called, passing WritableTypeId returned.
void	writeTypeSuffixForArray(Object value, com.fasterxml.jackson.core.JsonGenerator g)	Deprecated. Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead
void	writeTypeSuffixForObject(Object value, com.fasterxml.jackson.core.JsonGenerator g)	Deprecated. Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead
void	writeTypeSuffixForScalar(Object value, com.fasterxml.jackson.core.JsonGenerator g)	Deprecated. Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead

Methods inherited from class Object

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

Constructor Details

TypeSerializer

public TypeSerializer()

Method Details

forProperty

public abstract TypeSerializer forProperty(BeanProperty prop)

Method called to create contextual version, to be used for values of given property. This may be the type itself (as is the case for bean properties), or values contained (for Collection or Map valued properties).

Since:

2.0

getTypeInclusion

public abstract com.fasterxml.jackson.annotation.JsonTypeInfo.As getTypeInclusion()

Accessor for type information inclusion method that serializer uses; indicates how type information is embedded in resulting JSON.

getPropertyName

public abstract String getPropertyName()

Name of property that contains type information, if property-based inclusion is used.

getTypeIdResolver

public abstract TypeIdResolver getTypeIdResolver()

Accessor for object that handles conversions between types and matching type ids.

typeId

public com.fasterxml.jackson.core.type.WritableTypeId typeId(Object value,
 com.fasterxml.jackson.core.JsonToken valueShape)

Factory method for constructing type id value object to pass to writeTypePrefix(JsonGenerator, WritableTypeId).

typeId

public com.fasterxml.jackson.core.type.WritableTypeId typeId(Object value,
 com.fasterxml.jackson.core.JsonToken valueShape,
 Object id)

typeId

public com.fasterxml.jackson.core.type.WritableTypeId typeId(Object value,
 Class<?> typeForId,
 com.fasterxml.jackson.core.JsonToken valueShape)

writeTypePrefix

public abstract com.fasterxml.jackson.core.type.WritableTypeId writeTypePrefix(com.fasterxml.jackson.core.JsonGenerator g,
 com.fasterxml.jackson.core.type.WritableTypeId typeId)
                                                                        throws IOException

Method called to write initial part of type information for given value, along with possible wrapping to use: details are specified by `typeId` argument. Note that for structured types (Object, Array), this call will add necessary start token so it should NOT be explicitly written, unlike with non-type-id value writes.

See writeTypeSuffix(JsonGenerator, WritableTypeId) for a complete example of typical usage.

Parameters:

g - Generator to use for outputting type id and possible wrapping

typeId - Details of what type id is to be written, how.

Throws:

IOException

Since:

2.9

writeTypeSuffix

public abstract com.fasterxml.jackson.core.type.WritableTypeId writeTypeSuffix(com.fasterxml.jackson.core.JsonGenerator g,
 com.fasterxml.jackson.core.type.WritableTypeId typeId)
                                                                        throws IOException

Method that should be called after writeTypePrefix(JsonGenerator, WritableTypeId) and matching value write have been called, passing WritableTypeId returned. Usual idiom is:

 // Indicator generator that type identifier may be needed; generator may write
 // one as suggested, modify information, or take some other action
 // NOTE! For Object/Array types, this will ALSO write start marker!
 WritableTypeId typeIdDef = typeSer.writeTypePrefix(gen,
          typeSer.typeId(value, JsonToken.START_OBJECT));

 // serializing actual value for which TypeId may have been written... like
 // NOTE: do NOT write START_OBJECT before OR END_OBJECT after:
 g.writeStringField("message", "Hello, world!"

 // matching type suffix call to let generator chance to add suffix, if any
 // NOTE! For Object/Array types, this will ALSO write end marker!
 typeSer.writeTypeSuffix(gen, typeIdDef);

Throws:

IOException

Since:

2.9

writeTypePrefixForScalar

@Deprecated
public void writeTypePrefixForScalar(Object value,
 com.fasterxml.jackson.core.JsonGenerator g)
                              throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, JsonToken.VALUE_STRING));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypePrefixForObject

@Deprecated
public void writeTypePrefixForObject(Object value,
 com.fasterxml.jackson.core.JsonGenerator g)
                              throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, JsonToken.START_OBJECT));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypePrefixForArray

@Deprecated
public void writeTypePrefixForArray(Object value,
 com.fasterxml.jackson.core.JsonGenerator g)
                             throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, JsonToken.START_ARRAY));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypeSuffixForScalar

@Deprecated
public void writeTypeSuffixForScalar(Object value,
 com.fasterxml.jackson.core.JsonGenerator g)
                              throws IOException

Deprecated.

Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypeSuffix(g, typeId(value, JsonToken.VALUE_STRING));. See writeTypeSuffix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypeSuffixForObject

@Deprecated
public void writeTypeSuffixForObject(Object value,
 com.fasterxml.jackson.core.JsonGenerator g)
                              throws IOException

Deprecated.

Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypeSuffix(g, typeId(value, JsonToken.START_OBJECT));. See writeTypeSuffix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypeSuffixForArray

@Deprecated
public void writeTypeSuffixForArray(Object value,
 com.fasterxml.jackson.core.JsonGenerator g)
                             throws IOException

Deprecated.

Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypeSuffix(g, typeId(value, JsonToken.START_ARRAY));. See writeTypeSuffix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypePrefixForScalar

@Deprecated
public void writeTypePrefixForScalar(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 Class<?> type)
                              throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, type, JsonToken.VALUE_STRING));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypePrefixForObject

@Deprecated
public void writeTypePrefixForObject(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 Class<?> type)
                              throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, type, JsonToken.START_OBJECT));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeTypePrefixForArray

@Deprecated
public void writeTypePrefixForArray(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 Class<?> type)
                             throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, type, JsonToken.START_ARRAY));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeCustomTypePrefixForScalar

@Deprecated
public void writeCustomTypePrefixForScalar(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 String typeId)
                                    throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, JsonToken.VALUE_STRING, typeId));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeCustomTypePrefixForObject

@Deprecated
public void writeCustomTypePrefixForObject(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 String typeId)
                                    throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, JsonToken.START_OBJECT, typeId));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeCustomTypePrefixForArray

@Deprecated
public void writeCustomTypePrefixForArray(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 String typeId)
                                   throws IOException

Deprecated.

Since 2.9 use writeTypePrefix(JsonGenerator, WritableTypeId) instead

DEPRECATED: now equivalent to: writeTypePrefix(g, typeId(value, JsonToken.START_ARRAY, typeId));. See writeTypePrefix(JsonGenerator, WritableTypeId) for more info.

Throws:

IOException

writeCustomTypeSuffixForScalar

@Deprecated
public void writeCustomTypeSuffixForScalar(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 String typeId)
                                    throws IOException

Deprecated.

Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead

Throws:

IOException

writeCustomTypeSuffixForObject

@Deprecated
public void writeCustomTypeSuffixForObject(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 String typeId)
                                    throws IOException

Deprecated.

Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead

Throws:

IOException

writeCustomTypeSuffixForArray

@Deprecated
public void writeCustomTypeSuffixForArray(Object value,
 com.fasterxml.jackson.core.JsonGenerator g,
 String typeId)
                                   throws IOException

Deprecated.

Since 2.9 use writeTypeSuffix(JsonGenerator, WritableTypeId) instead

Throws:

IOException

_writeLegacySuffix

protected final void _writeLegacySuffix(com.fasterxml.jackson.core.JsonGenerator g,
 com.fasterxml.jackson.core.type.WritableTypeId typeId)
                                 throws IOException

Helper method needed for backwards compatibility: since original type id can not be routed through completely, we have to reverse-engineer likely setting before calling suffix.

Throws:

IOException

Since:

2.9