Class ExternalizableSerializer
java.lang.Object
com.esotericsoftware.kryo.Serializer
com.esotericsoftware.kryo.serializers.ExternalizableSerializer
Writes using the objects externalizable interface if it can reliably do so. Typically, a object can be efficiently written
with Kryo and Java's externalizable interface. However, there may be behavior problems if the class uses either the
'readResolve' or 'writeReplace' methods. We will fall back onto the standard
JavaSerializer
if we detect either of
these methods.
Note that this class does not specialize the type on Externalizable
. That is because if we fall back on the
JavaSerializer
it may have an readResolve
method that returns an object of a different type.-
Field Summary
FieldsModifier and TypeFieldDescriptionprivate ObjectMap
<Class, JavaSerializer> private KryoObjectInput
private KryoObjectOutput
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate JavaSerializer
getCachedSerializer
(Class type) private JavaSerializer
Determines if this class requires the fall-backJavaSerializer
.private ObjectInput
getObjectInput
(Kryo kryo, Input input) private ObjectOutput
getObjectOutput
(Kryo kryo, Output output) private static boolean
hasInheritableReplaceMethod
(Class type, String methodName) private boolean
Reads bytes and returns a new object of the specified concrete type.private Object
readExternal
(Kryo kryo, Input input, Class type) void
Writes the bytes for the object to the output.private void
writeExternal
(Kryo kryo, Output output, Object object) Methods inherited from class com.esotericsoftware.kryo.Serializer
copy, getAcceptsNull, isImmutable, setAcceptsNull, setGenerics, setImmutable
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Field Details
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javaSerializerByType
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objectInput
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objectOutput
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Constructor Details
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ExternalizableSerializer
public ExternalizableSerializer()
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Method Details
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write
Description copied from class:Serializer
Writes the bytes for the object to the output.This method should not be called directly, instead this serializer can be passed to
Kryo
write methods that accept a serialier.- Specified by:
write
in classSerializer
- Parameters:
object
- May be null ifSerializer.getAcceptsNull()
is true.
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read
Description copied from class:Serializer
Reads bytes and returns a new object of the specified concrete type.Before Kryo can be used to read child objects,
Kryo.reference(Object)
must be called with the parent object to ensure it can be referenced by the child objects. Any serializer that usesKryo
to read a child object may need to be reentrant.This method should not be called directly, instead this serializer can be passed to
Kryo
read methods that accept a serialier.- Specified by:
read
in classSerializer
- Returns:
- May be null if
Serializer.getAcceptsNull()
is true.
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writeExternal
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readExternal
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getObjectOutput
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getObjectInput
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getJavaSerializerIfRequired
Determines if this class requires the fall-backJavaSerializer
. If the class does not require any specialized Java serialization features then null will be returned.- Parameters:
type
- the type we wish to externalize- Returns:
- a
JavaSerializer
if the type requires more than simple externalization.
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getCachedSerializer
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isJavaSerializerRequired
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hasInheritableReplaceMethod
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