org.apache.parquet.io

Class ColumnIOFactory

java.lang.Object

org.apache.parquet.io.ColumnIOFactory

public class ColumnIOFactory
extends Object

Factory constructing the ColumnIO structure from the schema

Constructor Summary

Constructors

Constructor and Description
ColumnIOFactory() validation is off by default
ColumnIOFactory(boolean validating)
ColumnIOFactory(String createdBy) validation is off by default
ColumnIOFactory(String createdBy, boolean validating)

Method Summary

Modifier and Type	Method and Description
MessageColumnIO	getColumnIO(MessageType schema)
MessageColumnIO	getColumnIO(MessageType requestedSchema, MessageType fileSchema)
MessageColumnIO	getColumnIO(MessageType requestedSchema, MessageType fileSchema, boolean strict)

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnIOFactory

public ColumnIOFactory()

validation is off by default

ColumnIOFactory

public ColumnIOFactory(String createdBy)

validation is off by default

Parameters:

createdBy - createdBy string for readers

ColumnIOFactory

public ColumnIOFactory(boolean validating)

Parameters:

validating - to turn validation on

ColumnIOFactory

public ColumnIOFactory(String createdBy,
                       boolean validating)

Parameters:

createdBy - createdBy string for readers

validating - to turn validation on

Method Detail

getColumnIO

public MessageColumnIO getColumnIO(MessageType requestedSchema,
                                   MessageType fileSchema)

Parameters:

requestedSchema - the requestedSchema we want to read/write

fileSchema - the file schema (when reading it can be different from the requested schema)

Returns:

the corresponding serializing/deserializing structure

getColumnIO

public MessageColumnIO getColumnIO(MessageType requestedSchema,
                                   MessageType fileSchema,
                                   boolean strict)

Parameters:

requestedSchema - the requestedSchema we want to read/write

fileSchema - the file schema (when reading it can be different from the requested schema)

strict - should file type and requested primitive types match

Returns:

the corresponding serializing/deserializing structure

getColumnIO

public MessageColumnIO getColumnIO(MessageType schema)

Parameters:

schema - the schema we want to read/write

Returns:

the corresponding serializing/deserializing structure