WriteSupport (Apache Parquet Hadoop 1.12.0 API)

java.lang.Object
- org.apache.parquet.hadoop.api.WriteSupport<T>

Type Parameters:

T - the type of the incoming records

Direct Known Subclasses:

DelegatingWriteSupport, GroupWriteSupport
```
public abstract class WriteSupport<T>
extends Object
```
Abstraction to use with ParquetOutputFormat to convert incoming records

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`WriteSupport.FinalizedWriteContext`	Information to be added in the file once all the records have been written
`static class`	`WriteSupport.WriteContext`	information to be persisted in the file

Constructor Summary

Constructors
Constructor Description

WriteSupport()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`WriteSupport.FinalizedWriteContext`	`finalizeWrite()`	called once in the end after the last record was written
`String`	`getName()`	Called to get a name to identify the WriteSupport object model.
`abstract WriteSupport.WriteContext`	`init(org.apache.hadoop.conf.Configuration configuration)`	called first in the task
`abstract void`	`prepareForWrite(RecordConsumer recordConsumer)`	This will be called once per row group
`abstract void`	`write(T record)`	called once per record

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - WriteSupport
```
public WriteSupport()
```
- Method Detail
  - init
```
public abstract WriteSupport.WriteContext init(org.apache.hadoop.conf.Configuration configuration)
```
    called first in the task
    
    Parameters:
    
    configuration - the job's configuration
    
    Returns:
    
    the information needed to write the file
  - prepareForWrite
```
public abstract void prepareForWrite(RecordConsumer recordConsumer)
```
    This will be called once per row group
    
    Parameters:
    
    recordConsumer - the recordConsumer to write to
  - write
```
public abstract void write(T record)
```
    called once per record
    
    Parameters:
    
    record - one record to write to the previously provided record consumer
  - getName
```
public String getName()
```
    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.
    
    Returns:
    
    a String name for file metadata.
  - finalizeWrite
```
public WriteSupport.FinalizedWriteContext finalizeWrite()
```
    called once in the end after the last record was written
    
    Returns:
    
    information to be added in the file