com.google.cloud.bigtable.util

Class ZeroCopyByteStringUtil

java.lang.Object

com.google.cloud.bigtable.util.ZeroCopyByteStringUtil

public final class ZeroCopyByteStringUtil
extends Object

Helper class to extract byte arrays from ByteString without copy.

Without this protobufs would force us to copy every single byte array out of the objects de-serialized from the wire (which already do one copy, on top of the copies the JVM does to go from kernel buffer to C buffer and from C buffer to JVM buffer).

Version:

$Id: $Id

Author:

sduskis

Constructor Summary

Constructors

Constructor and Description
ZeroCopyByteStringUtil()

Method Summary

Modifier and Type	Method and Description
static byte[]	get(com.google.protobuf.ByteString byteString) Extracts the byte array from the given ByteString without copy.
static com.google.protobuf.ByteString	wrap(byte[] array) Wraps a byte array in a ByteString without copying it.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZeroCopyByteStringUtil

public ZeroCopyByteStringUtil()

Method Detail

wrap

public static com.google.protobuf.ByteString wrap(byte[] array)

Wraps a byte array in a ByteString without copying it.

Parameters:

array - an array of byte.

Returns:

a ByteString object.

get

public static byte[] get(com.google.protobuf.ByteString byteString)

Extracts the byte array from the given ByteString without copy.

Parameters:

byteString - A ByteString from which to extract the array.

Returns:

an array of byte.