com.google.cloud.dataflow.sdk.coders

Class AtomicCoder<T>

java.lang.Object

com.google.cloud.dataflow.sdk.coders.StandardCoder<T>

com.google.cloud.dataflow.sdk.coders.DeterministicStandardCoder<T>

com.google.cloud.dataflow.sdk.coders.AtomicCoder<T>

Type Parameters:

T - the type of the values being transcoded

All Implemented Interfaces:

Coder<T>, Serializable

Direct Known Subclasses:

BigEndianIntegerCoder, BigEndianLongCoder, ByteArrayCoder, ByteCoder, ByteStringCoder, CustomCoder, DoubleCoder, DurationCoder, EntityCoder, GlobalWindow.Coder, InstantCoder, JAXBCoder, PaneInfo.PaneInfoCoder, Proto2Coder, ProtoCoder, SerializableCoder, StringUtf8Coder, TableRowJsonCoder, TextualIntegerCoder, VarIntCoder, VarLongCoder, VoidCoder

public abstract class AtomicCoder<T>
extends DeterministicStandardCoder<T>

A Coder that has no component Coders or other state.

Note that, unless the behavior is overridden, atomic coders are presumed to be deterministic and all instances are considered equal.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.cloud.dataflow.sdk.coders.Coder

Coder.Context, Coder.NonDeterministicException

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AtomicCoder()

Method Summary

Modifier and Type	Method and Description
List<Coder<?>>	getCoderArguments() If this is a Coder for a parameterized type, returns the list of Coders being used for each of the parameters, or returns null if this cannot be done or this is not a parameterized type.
static <T> List<Object>	getInstanceComponents(T exampleValue) Returns a list of values contained in the provided example value, one per type parameter.

Methods inherited from class com.google.cloud.dataflow.sdk.coders.DeterministicStandardCoder

verifyDeterministic

Methods inherited from class com.google.cloud.dataflow.sdk.coders.StandardCoder

asCloudObject, consistentWithEquals, equals, getAllowedEncodings, getComponents, getEncodedElementByteSize, getEncodingId, hashCode, isRegisterByteSizeObserverCheap, registerByteSizeObserver, structuralValue, toString, verifyDeterministic, verifyDeterministic

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.google.cloud.dataflow.sdk.coders.Coder

decode, encode

Constructor Detail

AtomicCoder

protected AtomicCoder()

Method Detail

getCoderArguments

public List<Coder<?>> getCoderArguments()

Description copied from interface: Coder

If this is a Coder for a parameterized type, returns the list of Coders being used for each of the parameters, or returns null if this cannot be done or this is not a parameterized type.

getInstanceComponents

public static <T> List<Object> getInstanceComponents(T exampleValue)

Returns a list of values contained in the provided example value, one per type parameter. If there are no type parameters, returns an empty list.

Because AtomicCoder has no components, always returns an empty list.

Parameters:

exampleValue - unused, but part of the latent interface expected by CoderFactories.fromStaticMethods(java.lang.Class<T>)