parquet.column.values.plain

Class FixedLenByteArrayPlainValuesReader

java.lang.Object

parquet.column.values.ValuesReader

parquet.column.values.plain.FixedLenByteArrayPlainValuesReader

public class FixedLenByteArrayPlainValuesReader
extends ValuesReader

ValuesReader for FIXED_LEN_BYTE_ARRAY.

Author:

David Z. Chen

Constructor Summary

Constructors

Constructor and Description
FixedLenByteArrayPlainValuesReader(int length)

Method Summary

Methods

Modifier and Type	Method and Description
int	initFromPage(long valueCount, byte[] in, int offset) Called to initialize the column reader from a part of a page.
Binary	readBytes()
void	skip() Skips the next value in the page

Methods inherited from class parquet.column.values.ValuesReader

readBoolean, readDouble, readFloat, readInteger, readLong, readValueDictionaryId

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedLenByteArrayPlainValuesReader

public FixedLenByteArrayPlainValuesReader(int length)

Method Detail

readBytes

public Binary readBytes()

Overrides:

readBytes in class ValuesReader

Returns:

the next Binary from the page

skip

public void skip()

Description copied from class: ValuesReader

Skips the next value in the page

Specified by:

skip in class ValuesReader

initFromPage

public int initFromPage(long valueCount,
               byte[] in,
               int offset)
                 throws IOException

Description copied from class: ValuesReader

Called to initialize the column reader from a part of a page. The underlying implementation knows how much data to read, so a length is not provided. Each page may contain several sections:

• repetition levels column
• definition levels column
• data column

This function is called with 'offset' pointing to the beginning of one of these sections, and should return the offset to the section following it.

Specified by:

initFromPage in class ValuesReader

Parameters:

valueCount - count of values in this page

in - the array to read from containing the page data (repetition levels, definition levels, data)

offset - where to start reading from in the page

Returns:

the offset of the end of the data for this section of the page

Throws:

IOException