org.apache.parquet.hadoop.api

Class InitContext

java.lang.Object

org.apache.parquet.hadoop.api.InitContext

public class InitContext
extends Object

Context passed to ReadSupport when initializing for read

Author:

Julien Le Dem

Constructor Summary

Constructors

Constructor and Description
InitContext(org.apache.hadoop.conf.Configuration configuration, Map<String,Set<String>> keyValueMetadata, MessageType fileSchema)

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.hadoop.conf.Configuration	getConfiguration()
MessageType	getFileSchema() this is the union of all the schemas when reading multiple files.
Map<String,Set<String>>	getKeyValueMetadata() each key is associated with the list of distinct values found in footers
Map<String,String>	getMergedKeyValueMetaData() Deprecated.

Methods inherited from class java.lang.Object

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

Constructor Detail

InitContext

public InitContext(org.apache.hadoop.conf.Configuration configuration,
           Map<String,Set<String>> keyValueMetadata,
           MessageType fileSchema)

Parameters:

configuration - the hadoop configuration

keyValueMetadata - extra metadata from file footers

fileSchema - the merged schema from the files

Method Detail

getMergedKeyValueMetaData

@Deprecated
public Map<String,String> getMergedKeyValueMetaData()

Deprecated.

If there is a conflicting value when reading from multiple files, an exception will be thrown

Returns:

the merged key values metadata form the file footers

getConfiguration

public org.apache.hadoop.conf.Configuration getConfiguration()

Returns:

the configuration for this job

getFileSchema

public MessageType getFileSchema()

this is the union of all the schemas when reading multiple files.

Returns:

the schema of the files being read

getKeyValueMetadata

public Map<String,Set<String>> getKeyValueMetadata()

each key is associated with the list of distinct values found in footers

Returns:

the merged metadata from the footer of the file