com.google.cloud.dataflow.sdk.coders

Class StringDelegateCoder<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>

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

com.google.cloud.dataflow.sdk.coders.DelegateCoder<T,String>

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

Type Parameters:

T - The type of objects coded.

All Implemented Interfaces:

Coder<T>, Serializable

public class StringDelegateCoder<T>
extends DelegateCoder<T,String>

A StringDelegateCoder<T> wraps a Coder<String> and encodes/decodes values of type T via string representations.

To decode, the input byte stream is decoded to a String, and this is passed to the single-arg constructor for T.

To encode, the input value is converted via toString(), and this string is encoded.

In order for this to operate correctly for a class Clazz, it must be the case for any instance x that x.equals(new Clazz(x.toString())).

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.google.cloud.dataflow.sdk.coders.DelegateCoder

DelegateCoder.CodingFunction<InputT,OutputT>

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	StringDelegateCoder(Class<T> clazz)

Method Summary

Modifier and Type	Method and Description
static <T> StringDelegateCoder<T>	of(Class<T> clazz)
String	toString()

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

decode, encode, of, structuralValue, verifyDeterministic

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

asCloudObject, of

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

getCoderArguments, getInstanceComponents

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

consistentWithEquals, equals, getComponents, getEncodedElementByteSize, hashCode, isRegisterByteSizeObserverCheap, registerByteSizeObserver, verifyDeterministic, verifyDeterministic

Methods inherited from class java.lang.Object

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

Constructor Detail

StringDelegateCoder

protected StringDelegateCoder(Class<T> clazz)

Method Detail

of

public static <T> StringDelegateCoder<T> of(Class<T> clazz)

toString

public String toString()

Overrides:

toString in class DelegateCoder<T,String>