com.google.cloud.dataflow.sdk.coders

Class IterableCoder<T>

java.lang.Object

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

com.google.cloud.dataflow.sdk.coders.IterableLikeCoder<T,java.lang.Iterable<T>>

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

Type Parameters:

T - the type of the elements of the Iterables being transcoded

All Implemented Interfaces:

Coder<java.lang.Iterable<T>>, java.io.Serializable

public class IterableCoder<T>
extends IterableLikeCoder<T,java.lang.Iterable<T>>

An IterableCoder encodes Iterables.

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	IterableCoder(Coder<T> elemCoder)

Method Summary

Methods

Modifier and Type	Method and Description
com.google.cloud.dataflow.sdk.util.CloudObject	asCloudObject() Returns the CloudObject that represents this Coder.
protected java.lang.Iterable<T>	decodeToIterable(java.util.List<T> decodedElements) Builds an instance of the coder's associated Iterable from a list of decoded elements.
static <T> java.util.List<java.lang.Object>	getInstanceComponents(java.lang.Iterable<T> exampleValue) Returns the first element in this iterable if it is non-empty, otherwise returns null.
static <T> IterableCoder<T>	of(Coder<T> elemCoder)
static IterableCoder<?>	of(java.util.List<Coder<?>> components)

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

decode, encode, getCoderArguments, getElemCoder, getInstanceComponentsHelper, isDeterministic, isRegisterByteSizeObserverCheap, registerByteSizeObserver, verifyDeterministic

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

equals, getComponents, getEncodedElementByteSize, hashCode, toString, verifyDeterministic, verifyDeterministic

Methods inherited from class java.lang.Object

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

Constructor Detail

IterableCoder

protected IterableCoder(Coder<T> elemCoder)

Method Detail

of

public static <T> IterableCoder<T> of(Coder<T> elemCoder)

decodeToIterable

protected final java.lang.Iterable<T> decodeToIterable(java.util.List<T> decodedElements)

Description copied from class: IterableLikeCoder

Builds an instance of the coder's associated Iterable from a list of decoded elements. If IT is a supertype of List<T>, the derived class implementation is permitted to return decodedElements directly.

Specified by:

decodeToIterable in class IterableLikeCoder<T,java.lang.Iterable<T>>

of

public static IterableCoder<?> of(java.util.List<Coder<?>> components)

getInstanceComponents

public static <T> java.util.List<java.lang.Object> getInstanceComponents(java.lang.Iterable<T> exampleValue)

Returns the first element in this iterable if it is non-empty, otherwise returns null.

asCloudObject

public com.google.cloud.dataflow.sdk.util.CloudObject asCloudObject()

Description copied from interface: Coder

Returns the CloudObject that represents this Coder.

Specified by:

asCloudObject in interface Coder<java.lang.Iterable<T>>

Overrides:

asCloudObject in class StandardCoder<java.lang.Iterable<T>>