org.apache.parquet.hadoop.example

Class GroupWriteSupport

java.lang.Object

org.apache.parquet.hadoop.api.WriteSupport<Group>

org.apache.parquet.hadoop.example.GroupWriteSupport

public class GroupWriteSupport
extends WriteSupport<Group>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.parquet.hadoop.api.WriteSupport

WriteSupport.FinalizedWriteContext, WriteSupport.WriteContext

Field Summary

Fields

Modifier and Type	Field and Description
static String	PARQUET_EXAMPLE_SCHEMA

Constructor Summary

Constructors

Constructor and Description
GroupWriteSupport()

Method Summary

Methods

Modifier and Type	Method and Description
String	getName() Called to get a name to identify the WriteSupport object model.
static MessageType	getSchema(org.apache.hadoop.conf.Configuration configuration)
WriteSupport.WriteContext	init(org.apache.hadoop.conf.Configuration configuration) called first in the task
void	prepareForWrite(RecordConsumer recordConsumer) This will be called once per row group
static void	setSchema(MessageType schema, org.apache.hadoop.conf.Configuration configuration)
void	write(Group record) called once per record

Methods inherited from class org.apache.parquet.hadoop.api.WriteSupport

finalizeWrite

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PARQUET_EXAMPLE_SCHEMA

public static final String PARQUET_EXAMPLE_SCHEMA

See Also:

Constant Field Values

Constructor Detail

GroupWriteSupport

public GroupWriteSupport()

Method Detail

setSchema

public static void setSchema(MessageType schema,
             org.apache.hadoop.conf.Configuration configuration)

getSchema

public static MessageType getSchema(org.apache.hadoop.conf.Configuration configuration)

getName

public String getName()

Description copied from class: WriteSupport

Called to get a name to identify the WriteSupport object model. If not null, this is added to the file footer metadata.

Defining this method will be required in a future API version.

Overrides:

getName in class WriteSupport<Group>

Returns:

a String name for file metadata.

init

public WriteSupport.WriteContext init(org.apache.hadoop.conf.Configuration configuration)

Description copied from class: WriteSupport

called first in the task

Specified by:

init in class WriteSupport<Group>

Parameters:

configuration - the job's configuration

Returns:

the information needed to write the file

prepareForWrite

public void prepareForWrite(RecordConsumer recordConsumer)

Description copied from class: WriteSupport

This will be called once per row group

Specified by:

prepareForWrite in class WriteSupport<Group>

Parameters:

recordConsumer - the recordConsumer to write to

write

public void write(Group record)

Description copied from class: WriteSupport

called once per record

Specified by:

write in class WriteSupport<Group>

Parameters:

record - one record to write to the previously provided record consumer