Package org.apache.hadoop.hbase.io

Class ByteBufferInputStream

java.lang.Object

java.io.InputStream

org.apache.hadoop.hbase.io.ByteBufferInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

@Private
public class ByteBufferInputStream
extends InputStream

Not thread safe!

Please note that the reads will cause position movement on wrapped ByteBuffer.

Field Summary

Fields

Modifier and Type	Field	Description
private ByteBuffer	buf

Constructor Summary

Constructors

Constructor	Description
ByteBufferInputStream(ByteBuffer buf)

Method Summary

Modifier and Type	Method	Description
int	available()
int	read()	Reads the next byte of data from this input stream.
int	read(byte[] b, int off, int len)	Reads up to next len bytes of data from buffer into passed array(starting from given offset).
long	skip(long n)	Skips n bytes of input from this input stream.

Methods inherited from class java.io.InputStream

close, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Field Details

buf

private ByteBuffer buf

Constructor Details

ByteBufferInputStream

public ByteBufferInputStream(ByteBuffer buf)

Method Details

read

public int read()

Reads the next byte of data from this input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned.

Specified by:

read in class InputStream

Returns:

the next byte of data, or -1 if the end of the stream has been reached.

read

public int read(byte[] b,
 int off,
 int len)

Reads up to next len bytes of data from buffer into passed array(starting from given offset).

Overrides:

read in class InputStream

Parameters:

b - the array into which the data is read.

off - the start offset in the destination array b

len - the maximum number of bytes to read.

Returns:

the total number of bytes actually read into the buffer, or -1 if not even 1 byte can be read because the end of the stream has been reached.

skip

public long skip(long n)

Skips n bytes of input from this input stream. Fewer bytes might be skipped if the end of the input stream is reached. The actual number k of bytes to be skipped is equal to the smaller of n and remaining bytes in the stream.

Overrides:

skip in class InputStream

Parameters:

n - the number of bytes to be skipped.

Returns:

the actual number of bytes skipped.

available

public int available()

Overrides:

available in class InputStream

Returns:

the number of remaining bytes that can be read (or skipped over) from this input stream.