com.google.cloud.dataflow.sdk.coders

Class DurationCoder

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<ReadableDuration>

com.google.cloud.dataflow.sdk.coders.DurationCoder

All Implemented Interfaces:

Coder<ReadableDuration>, Serializable

public class DurationCoder
extends AtomicCoder<ReadableDuration>

A Coder that encodes a joda Duration as a Long using the format of VarLongCoder.

See Also:

Serialized Form

Nested Class Summary

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

Coder.Context, Coder.NonDeterministicException

Method Summary

Modifier and Type	Method and Description
boolean	consistentWithEquals() Returns true if this Coder is injective with respect to Object.equals(java.lang.Object).
ReadableDuration	decode(InputStream inStream, Coder.Context context) Decodes a value of type T from the given input stream in the given context.
void	encode(ReadableDuration value, OutputStream outStream, Coder.Context context) Encodes the given value of type T onto the given output stream in the given context.
boolean	isRegisterByteSizeObserverCheap(ReadableDuration value, Coder.Context context) Returns whether Coder.registerByteSizeObserver(T, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver, com.google.cloud.dataflow.sdk.coders.Coder.Context) cheap enough to call for every element, that is, if this Coder can calculate the byte size of the element to be coded in roughly constant time (or lazily).
static DurationCoder	of()
void	registerByteSizeObserver(ReadableDuration value, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver observer, Coder.Context context) Notifies the ElementByteSizeObserver about the byte size of the encoded value using this Coder.

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

getCoderArguments, getInstanceComponents

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

verifyDeterministic

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

asCloudObject, equals, getAllowedEncodings, getComponents, getEncodedElementByteSize, getEncodingId, hashCode, structuralValue, toString, verifyDeterministic, verifyDeterministic

Methods inherited from class java.lang.Object

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

Method Detail

of

public static DurationCoder of()

encode

public void encode(ReadableDuration value,
                   OutputStream outStream,
                   Coder.Context context)
            throws CoderException,
                   IOException

Description copied from interface: Coder

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

Throws:

CoderException - if the value could not be encoded for some reason

IOException - if writing to the OutputStream fails for some reason

decode

public ReadableDuration decode(InputStream inStream,
                               Coder.Context context)
                        throws CoderException,
                               IOException

Description copied from interface: Coder

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

Throws:

CoderException - if the value could not be decoded for some reason

IOException - if reading from the InputStream fails for some reason

consistentWithEquals

public boolean consistentWithEquals()

Returns true if this Coder is injective with respect to Object.equals(java.lang.Object).

Whenever the encoded bytes of two values are equal, then the original values are equal according to Objects.equals(). Note that this is well-defined for null.

This condition is most notably false for arrays. More generally, this condition is false whenever equals() compares object identity, rather than performing a semantic/structural comparison.

Specified by:

consistentWithEquals in interface Coder<ReadableDuration>

Overrides:

consistentWithEquals in class StandardCoder<ReadableDuration>

Returns:

true. This coder is injective.

isRegisterByteSizeObserverCheap

public boolean isRegisterByteSizeObserverCheap(ReadableDuration value,
                                               Coder.Context context)

Returns whether Coder.registerByteSizeObserver(T, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver, com.google.cloud.dataflow.sdk.coders.Coder.Context) cheap enough to call for every element, that is, if this Coder can calculate the byte size of the element to be coded in roughly constant time (or lazily).

Not intended to be called by user code, but instead by PipelineRunner implementations.

Specified by:

isRegisterByteSizeObserverCheap in interface Coder<ReadableDuration>

Overrides:

isRegisterByteSizeObserverCheap in class StandardCoder<ReadableDuration>

Returns:

true, because it is cheap to ascertain the byte size of a long.

registerByteSizeObserver

public void registerByteSizeObserver(ReadableDuration value,
                                     com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver observer,
                                     Coder.Context context)
                              throws Exception

Description copied from class: StandardCoder

Notifies the ElementByteSizeObserver about the byte size of the encoded value using this Coder.

Not intended to be called by user code, but instead by PipelineRunner implementations.

For StandardCoder subclasses, this notifies observer about the byte size of the encoded value using this coder as returned by StandardCoder.getEncodedElementByteSize(T, com.google.cloud.dataflow.sdk.coders.Coder.Context).

Specified by:

registerByteSizeObserver in interface Coder<ReadableDuration>

Overrides:

registerByteSizeObserver in class StandardCoder<ReadableDuration>

Throws:

Exception