org.apache.parquet.io.api

Class RecordConsumer

java.lang.Object

org.apache.parquet.io.api.RecordConsumer

Direct Known Subclasses:

RecordConsumerLoggingWrapper, ValidatingRecordConsumer

public abstract class RecordConsumer
extends Object

Abstraction for writing records It decouples the striping algorithm from the actual record model example:

 startMessage()
  startField("A", 0)
   addValue(1)
   addValue(2)
  endField("A", 0)
  startField("B", 1)
   startGroup()
    startField("C", 0)
     addValue(3)
    endField("C", 0)
   endGroup()
  endField("B", 1)
 endMessage()
 

would produce the following message:

 {
   A: [1, 2]
   B: {
     C: 3
   }
 }
 

Constructor Summary

Constructors

Constructor and Description
RecordConsumer()

Method Summary

Modifier and Type	Method and Description
abstract void	addBinary(Binary value) add a binary value in the current field
abstract void	addBoolean(boolean value) add a boolean value in the current field
abstract void	addDouble(double value) add a double value in the current field
abstract void	addFloat(float value) add a float value in the current field
abstract void	addInteger(int value) add an int value in the current field
abstract void	addLong(long value) add a long value in the current field
abstract void	endField(String field, int index) end of a field in a group or message
abstract void	endGroup() end of a group in a field
abstract void	endMessage() end of a record
void	flush() NoOps by default Subclass class can implement its own flushing logic
abstract void	startField(String field, int index) start of a field in a group or message if the field is repeated the field is started only once and all values added in between start and end
abstract void	startGroup() start of a group in a field
abstract void	startMessage() start a new record

Methods inherited from class java.lang.Object

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

Constructor Detail

RecordConsumer

public RecordConsumer()

Method Detail

startMessage

public abstract void startMessage()

start a new record

endMessage

public abstract void endMessage()

end of a record

startField

public abstract void startField(String field,
                                int index)

start of a field in a group or message if the field is repeated the field is started only once and all values added in between start and end

Parameters:

field - name of the field

index - of the field in the group or message

endField

public abstract void endField(String field,
                              int index)

end of a field in a group or message

Parameters:

field - name of the field

index - of the field in the group or message

startGroup

public abstract void startGroup()

start of a group in a field

endGroup

public abstract void endGroup()

end of a group in a field

addInteger

public abstract void addInteger(int value)

add an int value in the current field

Parameters:

value - an int value

addLong

public abstract void addLong(long value)

add a long value in the current field

Parameters:

value - a long value

addBoolean

public abstract void addBoolean(boolean value)

add a boolean value in the current field

Parameters:

value - a boolean value

addBinary

public abstract void addBinary(Binary value)

add a binary value in the current field

Parameters:

value - a binary value

addFloat

public abstract void addFloat(float value)

add a float value in the current field

Parameters:

value - a float value

addDouble

public abstract void addDouble(double value)

add a double value in the current field

Parameters:

value - a double value

flush

public void flush()

NoOps by default Subclass class can implement its own flushing logic