com.google.cloud.dataflow.sdk.transforms.windowing

Class GlobalWindow.Coder

java.lang.Object

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

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

com.google.cloud.dataflow.sdk.transforms.windowing.GlobalWindow.Coder

All Implemented Interfaces:

Coder<GlobalWindow>, java.io.Serializable

Enclosing class:

GlobalWindow

public static class GlobalWindow.Coder
extends AtomicCoder<GlobalWindow>

Coder for encoding and decoding Windows.

See Also:

Serialized Form

Nested Class Summary

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

Coder.Context, Coder.NonDeterministicException

Field Summary

Fields

Modifier and Type	Field and Description
static GlobalWindow.Coder	INSTANCE

Method Summary

Methods

Modifier and Type	Method and Description
GlobalWindow	decode(java.io.InputStream inStream, Coder.Context context) Decodes a value of type T from the given input stream in the given context.
void	encode(GlobalWindow window, java.io.OutputStream outStream, Coder.Context context) Encodes the given value of type T onto the given output stream in the given context.
boolean	isDeterministic() Returns true if the coding is deterministic.

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

getCoderArguments, getInstanceComponents

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

asCloudObject, equals, getComponents, getEncodedElementByteSize, hashCode, isRegisterByteSizeObserverCheap, registerByteSizeObserver, toString, verifyDeterministic, verifyDeterministic, verifyDeterministic

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final GlobalWindow.Coder INSTANCE

Method Detail

encode

public void encode(GlobalWindow window,
          java.io.OutputStream outStream,
          Coder.Context context)

Description copied from interface: Coder

Encodes the given value of type T onto the given output stream in the given context.

decode

public GlobalWindow decode(java.io.InputStream inStream,
                  Coder.Context context)

Description copied from interface: Coder

Decodes a value of type T from the given input stream in the given context. Returns the decoded value.

isDeterministic

public boolean isDeterministic()

Description copied from interface: Coder

Returns true if the coding is deterministic.

In order for a Coder to be considered deterministic, the following must be true:

• two values which compare as equal (via Object.equals() or Comparable.compareTo(), if supported), have the same encoding.
• the Coder always produces a canonical encoding, which is the same for an instance of an object even if produced on different computers at different times.