org.apache.paimon.format.parquet.reader

Class NestedPositionUtil

java.lang.Object

org.apache.paimon.format.parquet.reader.NestedPositionUtil

public class NestedPositionUtil
extends Object

Utils to calculate nested type position.

Constructor Summary

Constructors

Constructor and Description
NestedPositionUtil()

Method Summary

Modifier and Type	Method and Description
static CollectionPosition	calculateCollectionOffsets(ParquetField field, int[] definitionLevels, int[] repetitionLevels, boolean readRowField) Calculate the collection's offsets according to column's max repetition level, definition level, value's repetition level and definition level.
static long[]	calculateLengthByOffsets(boolean[] collectionIsEmpty, long[] arrayOffsets)

Methods inherited from class java.lang.Object

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

Constructor Detail

NestedPositionUtil

public NestedPositionUtil()

Method Detail

calculateCollectionOffsets

public static CollectionPosition calculateCollectionOffsets(ParquetField field,
                                                            int[] definitionLevels,
                                                            int[] repetitionLevels,
                                                            boolean readRowField)

Calculate the collection's offsets according to column's max repetition level, definition level, value's repetition level and definition level. Each collection (Array or Map) has four situation:

Collection is not defined, because optional parent fields is null, this is decided by its parent's repetition level Collection is null Collection is defined but empty Collection is defined and not empty. In this case offset value is increased by the number of elements in that collection

Parameters:

field - field that contains array/map column message include max repetition level and definition level.

definitionLevels - int array with each value's repetition level.

repetitionLevels - int array with each value's definition level.

Returns:

CollectionPosition contains collections offset array, length array and isNull array.

calculateLengthByOffsets

public static long[] calculateLengthByOffsets(boolean[] collectionIsEmpty,
                                              long[] arrayOffsets)