Package com.fasterxml.jackson.databind

Class ObjectWriter.Prefetch

java.lang.Object

com.fasterxml.jackson.databind.ObjectWriter.Prefetch

All Implemented Interfaces:

Serializable

Enclosing class:

ObjectWriter

public static final class ObjectWriter.Prefetch
extends Object
implements Serializable

As a minor optimization, we will make an effort to pre-fetch a serializer, or at least relevant TypeSerializer, if given enough information.

Since:

2.5

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final ObjectWriter.Prefetch	empty
private final JavaType	rootType	Specified root serialization type to use; can be same as runtime type, but usually one of its super types (parent class or interface it implements).
private static final long	serialVersionUID
private final TypeSerializer	typeSerializer	When dealing with polymorphic types, we cannot pre-fetch serializer, but can pre-fetch TypeSerializer.
private final JsonSerializer<Object>	valueSerializer	We may pre-fetch serializer if rootType is known, and if so, reuse it afterwards.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Prefetch(JavaType rootT, JsonSerializer<Object> ser, TypeSerializer typeSer)

Method Summary

Modifier and Type	Method	Description
ObjectWriter.Prefetch	forRootType(ObjectWriter parent, JavaType newType)
final TypeSerializer	getTypeSerializer()
final JsonSerializer<Object>	getValueSerializer()
boolean	hasSerializer()
void	serialize(com.fasterxml.jackson.core.JsonGenerator gen, Object value, DefaultSerializerProvider prov)

Methods inherited from class java.lang.Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

empty

public static final ObjectWriter.Prefetch empty

rootType

private final JavaType rootType

Specified root serialization type to use; can be same as runtime type, but usually one of its super types (parent class or interface it implements).

valueSerializer

private final JsonSerializer<Object> valueSerializer

We may pre-fetch serializer if rootType is known, and if so, reuse it afterwards. This allows avoiding further serializer lookups and increases performance a bit on cases where readers are reused.

typeSerializer

private final TypeSerializer typeSerializer

When dealing with polymorphic types, we cannot pre-fetch serializer, but can pre-fetch TypeSerializer.

Constructor Details

Prefetch

private Prefetch(JavaType rootT,
 JsonSerializer<Object> ser,
 TypeSerializer typeSer)

Method Details

forRootType

public ObjectWriter.Prefetch forRootType(ObjectWriter parent,
 JavaType newType)

getValueSerializer

public final JsonSerializer<Object> getValueSerializer()

getTypeSerializer

public final TypeSerializer getTypeSerializer()

hasSerializer

public boolean hasSerializer()

serialize

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

Throws:

IOException