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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.conf.Configuration	getConfiguration() Deprecated. Use getParquetConfiguration() instead
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.
ParquetConfiguration	getParquetConfiguration()

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

InitContext

public InitContext(ParquetConfiguration configuration,
                   Map<String,Set<String>> keyValueMetadata,
                   MessageType fileSchema)

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

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

Deprecated. Use getParquetConfiguration() instead

Returns:

the configuration for this job

getParquetConfiguration

public ParquetConfiguration getParquetConfiguration()

Returns:

the Parquet 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