org.apache.parquet.hadoop.example.ExampleOutputFormat Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
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package org.apache.parquet.hadoop.example;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.Job;
import org.apache.parquet.example.data.Group;
import org.apache.parquet.hadoop.ParquetOutputFormat;
import org.apache.parquet.hadoop.util.ContextUtil;
import org.apache.parquet.schema.MessageType;
/**
* An example output format
*
* must be provided the schema up front
* @see ExampleOutputFormat#setSchema(Job, MessageType)
* @see GroupWriteSupport#PARQUET_EXAMPLE_SCHEMA
*
* @author Julien Le Dem
*
*/
public class ExampleOutputFormat extends ParquetOutputFormat {
/**
* set the schema being written to the job conf
* @param job
* @param schema the schema of the data
*/
public static void setSchema(Job job, MessageType schema) {
GroupWriteSupport.setSchema(schema, ContextUtil.getConfiguration(job));
}
/**
* retrieve the schema from the conf
* @param job
* @return the schema
*/
public static MessageType getSchema(Job job) {
return GroupWriteSupport.getSchema(ContextUtil.getConfiguration(job));
}
public ExampleOutputFormat() {
super(new GroupWriteSupport());
}
}