org.apache.paimon.format.parquet.reader

类 NestedPositionUtil

java.lang.Object

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

public class NestedPositionUtil
extends Object

Utils to calculate nested type position.

构造器概要

构造器

构造器和说明
NestedPositionUtil()

方法概要

限定符和类型	方法和说明
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)

从类继承的方法 java.lang.Object

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

构造器详细资料

NestedPositionUtil

public NestedPositionUtil()

方法详细资料

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

参数:

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.

返回:

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

calculateLengthByOffsets

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