Package org.apache.hadoop.hbase.io.util

Class StreamUtils

java.lang.Object

org.apache.hadoop.hbase.io.util.StreamUtils

@Private
public class StreamUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
StreamUtils()

Method Summary

Modifier and Type	Method	Description
static byte	readByte(InputStream in)	Read a byte from the given stream using the read method, and throw EOFException if it returns -1, like the implementation in DataInputStream.
static long	readLong(InputStream in)
static Pair<Integer,Integer>	readRawVarint32(byte[] input, int offset)	Reads a varInt value stored in an array.
static int	readRawVarint32(InputStream input)
static Pair<Integer,Integer>	readRawVarint32(ByteBuffer input, int offset)
static int	readRawVarint32(ByteBuff input)
static short	toShort(byte hi, byte lo)
static void	writeInt(OutputStream out, int v)
static void	writeLong(OutputStream out, long v)
static void	writeRawVInt32(OutputStream output, int value)
static void	writeShort(OutputStream out, short v)

Methods inherited from class java.lang.Object

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

Constructor Details

StreamUtils

public StreamUtils()

Method Details

writeRawVInt32

public static void writeRawVInt32(OutputStream output,
 int value)
                           throws IOException

Throws:

IOException

readRawVarint32

public static int readRawVarint32(InputStream input)
                           throws IOException

Throws:

IOException

readRawVarint32

public static int readRawVarint32(ByteBuff input)
                           throws IOException

Throws:

IOException

readRawVarint32

public static Pair<Integer,Integer> readRawVarint32(byte[] input,
 int offset)
                                             throws IOException

Reads a varInt value stored in an array. Input array where the varInt is available Offset in the input array where varInt is available

Returns:

A pair of integers in which first value is the actual decoded varInt value and second value as number of bytes taken by this varInt for it's storage in the input array.

Throws:

IOException - When varint is malformed and not able to be read correctly

readRawVarint32

public static Pair<Integer,Integer> readRawVarint32(ByteBuffer input,
 int offset)
                                             throws IOException

Throws:

IOException

readByte

public static byte readByte(InputStream in)
                     throws IOException

Read a byte from the given stream using the read method, and throw EOFException if it returns -1, like the implementation in DataInputStream.

This is useful because casting the return value of read method into byte directly will make us lose the ability to check whether there is a byte and its value is -1 or we reach EOF, as casting int -1 to byte also returns -1.

Throws:

IOException

toShort

public static short toShort(byte hi,
 byte lo)

writeShort

public static void writeShort(OutputStream out,
 short v)
                       throws IOException

Throws:

IOException

writeInt

public static void writeInt(OutputStream out,
 int v)
                     throws IOException

Throws:

IOException

writeLong

public static void writeLong(OutputStream out,
 long v)
                      throws IOException

Throws:

IOException

readLong

public static long readLong(InputStream in)
                     throws IOException

Throws:

IOException