Package org.bson.codecs

Class BsonUndefinedCodec

java.lang.Object

org.bson.codecs.BsonUndefinedCodec

All Implemented Interfaces:

Codec<BsonUndefined>, Decoder<BsonUndefined>, Encoder<BsonUndefined>

public class BsonUndefinedCodec
extends Object
implements Codec<BsonUndefined>

Allows reading and writing of the BSON Undefined type. On encoding, it will write the correct type to the BsonWriter, but ignore the value, and on decoding it will read the type off the BsonReader and return an Undefined type, which simply represents a placeholder for the undefined value.

The undefined type is deprecated (see the spec).

Since:

3.0

See Also:

• BSON Spec
• BsonType.UNDEFINED

Constructor Summary

Constructors

Constructor	Description
BsonUndefinedCodec()

Method Summary

Modifier and Type	Method	Description
BsonUndefined	decode(BsonReader reader, DecoderContext decoderContext)	Decodes a BSON value from the given reader into an instance of the type parameter T.
void	encode(BsonWriter writer, BsonUndefined value, EncoderContext encoderContext)	Encode an instance of the type parameter T into a BSON value.
Class<BsonUndefined>	getEncoderClass()	Returns the Class instance that this encodes.

Methods inherited from class java.lang.Object

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

Constructor Details

BsonUndefinedCodec

public BsonUndefinedCodec()

Method Details

decode

public BsonUndefined decode(BsonReader reader,
 DecoderContext decoderContext)

Description copied from interface: Decoder

Decodes a BSON value from the given reader into an instance of the type parameter T.

Specified by:

decode in interface Decoder<BsonUndefined>

Parameters:

reader - the BSON reader

decoderContext - the decoder context

Returns:

an instance of the type parameter T.

encode

public void encode(BsonWriter writer,
 BsonUndefined value,
 EncoderContext encoderContext)

Description copied from interface: Encoder

Encode an instance of the type parameter T into a BSON value.

Specified by:

encode in interface Encoder<BsonUndefined>

Parameters:

writer - the BSON writer to encode into

value - the value to encode

encoderContext - the encoder context

getEncoderClass

public Class<BsonUndefined> getEncoderClass()

Description copied from interface: Encoder

Returns the Class instance that this encodes. This is necessary because Java does not reify generic types.

Specified by:

getEncoderClass in interface Encoder<BsonUndefined>

Returns:

the Class instance that this encodes.