uk.ac.starlink.parquet

Class ParquetUtil

java.lang.Object

uk.ac.starlink.parquet.ParquetUtil

public class ParquetUtil
extends java.lang.Object

Utility classes for Parquet I/O.

Since:

26 Feb 2021

Method Summary

Modifier and Type	Method and Description
static uk.ac.starlink.parquet.ParquetIO	getIO() Returns the ParquetIO object that handles all the parquet-mr-dependent I/O.
static boolean	isMagic(byte[] buffer) Indicates whether the given buffer starts with the Parquet file format magic number, "PAR1".

Methods inherited from class java.lang.Object

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

Method Detail

isMagic

public static boolean isMagic(byte[] buffer)

Indicates whether the given buffer starts with the Parquet file format magic number, "PAR1". Note that Parquet files have to both start and end with this sequence.

Parameters:

buffer - byte content

Returns:

true iff the first four bytes in the buffer are ASCII "PAR1"

getIO

public static uk.ac.starlink.parquet.ParquetIO getIO()
                                              throws java.io.IOException

Returns the ParquetIO object that handles all the parquet-mr-dependent I/O. If the parquet-mr libraries are not present, an IOException with a suitable message will be thrown.

Returns:

parquetIO object, not null

Throws:

java.io.IOException - if libraries are not present