com.alipay.sofa.jraft.util

Class BufferUtils

java.lang.Object

com.alipay.sofa.jraft.util.BufferUtils

public class BufferUtils
extends Object

Explicit cast to Buffer parent buffer type. It resolves issues with covariant return types in Java 9+ for ByteBuffer and CharBuffer. Explicit casting resolves the NoSuchMethodErrors (e.g java.lang.NoSuchMethodError: java.nio.ByteBuffer.flip(I)Ljava/nio/ByteBuffer) when the project is compiled with newer Java version and run on Java 8.

Java 8 doesn't provide override the following Buffer methods in subclasses:

 Buffer clear()
 Buffer flip()
 Buffer limit(int newLimit)
 Buffer mark()
 Buffer position(int newPosition)
 Buffer reset()
 Buffer rewind()
 

Java 9 introduces the overrides in child classes (e.g the ByteBuffer), but the return type is the specialized one and not the abstract Buffer. So the code compiled with newer Java is not working on Java 8 unless a workaround with explicit casting is used.

Author:

funkye

Constructor Summary

Constructors

Constructor and Description
BufferUtils()

Method Summary

Modifier and Type	Method and Description
static void	clear(Buffer buffer)
static void	flip(Buffer buffer)
static void	limit(Buffer buffer, int newLimit)
static void	mark(Buffer buffer)
static void	position(Buffer buffer, int newPosition)
static void	reset(Buffer buffer)
static void	rewind(Buffer buffer)

Methods inherited from class java.lang.Object

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

Constructor Detail

BufferUtils

public BufferUtils()

Method Detail

flip

public static void flip(Buffer buffer)

Parameters:

buffer - byteBuffer

clear

public static void clear(Buffer buffer)

Parameters:

buffer - byteBuffer

limit

public static void limit(Buffer buffer,
                         int newLimit)

Parameters:

buffer - byteBuffer

mark

public static void mark(Buffer buffer)

Parameters:

buffer - byteBuffer

position

public static void position(Buffer buffer,
                            int newPosition)

Parameters:

buffer - byteBuffer

rewind

public static void rewind(Buffer buffer)

Parameters:

buffer - byteBuffer

reset

public static void reset(Buffer buffer)

Parameters:

buffer - byteBuffer