org.apache.beam.sdk.coders

Class TableRowJsonCoder

java.lang.Object

org.apache.beam.sdk.coders.StandardCoder<T>

org.apache.beam.sdk.coders.DeterministicStandardCoder<T>

org.apache.beam.sdk.coders.AtomicCoder<TableRow>

org.apache.beam.sdk.coders.TableRowJsonCoder

All Implemented Interfaces:

Serializable, Coder<TableRow>

public class TableRowJsonCoder
extends AtomicCoder<TableRow>

A Coder that encodes BigQuery TableRow objects in their native JSON format.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.beam.sdk.coders.Coder

Coder.Context, Coder.NonDeterministicException

Method Summary

Modifier and Type	Method and Description
TableRow	decode(InputStream inStream, Coder.Context context) Decodes a value of type T from the given input stream in the given context.
void	encode(TableRow value, OutputStream outStream, Coder.Context context) Encodes the given value of type T onto the given output stream in the given context.
protected long	getEncodedElementByteSize(TableRow value, Coder.Context context) Returns the size in bytes of the encoded value using this coder.
static TableRowJsonCoder	of()
void	verifyDeterministic() Throw Coder.NonDeterministicException if the coding is not deterministic.

Methods inherited from class org.apache.beam.sdk.coders.AtomicCoder

getCoderArguments, getInstanceComponents

Methods inherited from class org.apache.beam.sdk.coders.StandardCoder

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

Methods inherited from class java.lang.Object

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

Method Detail

of

public static TableRowJsonCoder of()

encode

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

Description copied from interface: Coder

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

Throws:

IOException - if writing to the OutputStream fails for some reason

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

decode

public TableRow decode(InputStream inStream,
                       Coder.Context context)
                throws 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:

IOException - if reading from the InputStream fails for some reason

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

getEncodedElementByteSize

protected long getEncodedElementByteSize(TableRow value,
                                         Coder.Context context)
                                  throws Exception

Description copied from class: StandardCoder

Returns the size in bytes of the encoded value using this coder.

Overrides:

getEncodedElementByteSize in class StandardCoder<TableRow>

Throws:

Exception

verifyDeterministic

public void verifyDeterministic()
                         throws Coder.NonDeterministicException

Throw Coder.NonDeterministicException if the coding is not deterministic.

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

• two values that 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.

Specified by:

verifyDeterministic in interface Coder<TableRow>

Overrides:

verifyDeterministic in class DeterministicStandardCoder<TableRow>

Throws:

NonDeterministicException - always. A TableRow can hold arbitrary Object instances, which makes the encoding non-deterministic.

Coder.NonDeterministicException - if this coder is not deterministic.