com.fasterxml.jackson.databind.ser

Class ContainerSerializer<T>

java.lang.Object

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

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

com.fasterxml.jackson.databind.ser.ContainerSerializer<T>

All Implemented Interfaces:

JsonFormatVisitable, SchemaAware

Direct Known Subclasses:

ArraySerializerBase, AsArraySerializerBase, EnumMapSerializer, MapSerializer

public abstract class ContainerSerializer<T>
extends StdSerializer<T>

Intermediate base class for serializers used for serializing types that contain element(s) of other types, such as arrays, Collections (Lists, Sets etc) and Maps and iterable things (Iterators).

Nested Class Summary

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

JsonSerializer.None

Field Summary

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

_handledType

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract ContainerSerializer<?>	_withValueTypeSerializer(TypeSerializer vts) Method that needs to be implemented to allow construction of a new serializer object with given TypeSerializer, used when addition type information is to be embedded.
abstract JsonSerializer<?>	getContentSerializer() Accessor for serializer used for serializing contents (List and array elements, Map values etc) of the container for which this serializer is used, if it is known statically.
abstract JavaType	getContentType() Accessor for finding declared (static) element type for type this serializer is used for.
protected boolean	hasContentTypeAnnotation(SerializerProvider provider, BeanProperty property) Helper method used to encapsulate logic for determining whether there is a property annotation that overrides element type; if so, we can and need to statically find the serializer.
abstract boolean	hasSingleElement(T value) Method called to determine if the given value (of type handled by this serializer) contains exactly one element.
abstract boolean	isEmpty(T value) Method called to check whether given serializable value is considered "empty" value (for purposes of suppressing serialization of empty values).
ContainerSerializer<?>	withValueTypeSerializer(TypeSerializer vts) Factory(-like) method that can be used to construct a new container serializer that uses specified TypeSerializer for decorating contained values with additional type information.

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

acceptJsonFormatVisitor, createObjectNode, createSchemaNode, createSchemaNode, findConvertingContentSerializer, getSchema, getSchema, handledType, isDefaultSerializer, serialize, wrapAndThrow, wrapAndThrow

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

getDelegatee, isUnwrappingSerializer, replaceDelegatee, serializeWithType, unwrappingSerializer, usesObjectId

Methods inherited from class java.lang.Object

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

Constructor Detail

ContainerSerializer

protected ContainerSerializer(Class<T> t)

ContainerSerializer

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

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

Parameters:

t -

ContainerSerializer

protected ContainerSerializer(ContainerSerializer<?> src)

Method Detail

withValueTypeSerializer

public ContainerSerializer<?> withValueTypeSerializer(TypeSerializer vts)

Factory(-like) method that can be used to construct a new container serializer that uses specified TypeSerializer for decorating contained values with additional type information.

Parameters:

vts - Type serializer to use for contained values; can be null, in which case 'this' serializer is returned as is

Returns:

Serializer instance that uses given type serializer for values if that is possible (or if not, just 'this' serializer)

getContentType

public abstract JavaType getContentType()

Accessor for finding declared (static) element type for type this serializer is used for.

getContentSerializer

public abstract JsonSerializer<?> getContentSerializer()

Accessor for serializer used for serializing contents (List and array elements, Map values etc) of the container for which this serializer is used, if it is known statically. Note that for dynamic types this may return null; if so, caller has to instead use getContentType() and SerializerProvider.findValueSerializer(java.lang.Class<?>, com.fasterxml.jackson.databind.BeanProperty).

isEmpty

public abstract boolean isEmpty(T 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.

Overrides:

isEmpty in class JsonSerializer<T>

hasSingleElement

public abstract boolean hasSingleElement(T value)

Method called to determine if the given value (of type handled by this serializer) contains exactly one element.

Note: although it might seem sensible to instead define something like "getElementCount()" method, this would not work well for containers that do not keep track of size (like linked lists may not).

_withValueTypeSerializer

protected abstract ContainerSerializer<?> _withValueTypeSerializer(TypeSerializer vts)

Method that needs to be implemented to allow construction of a new serializer object with given TypeSerializer, used when addition type information is to be embedded.

hasContentTypeAnnotation

protected boolean hasContentTypeAnnotation(SerializerProvider provider,
                               BeanProperty property)

Helper method used to encapsulate logic for determining whether there is a property annotation that overrides element type; if so, we can and need to statically find the serializer.

Since:

2.1