org.mariadb.jdbc.internal.io.input

Class ReadAheadBufferedStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.mariadb.jdbc.internal.io.input.ReadAheadBufferedStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class ReadAheadBufferedStream
extends java.io.FilterInputStream

Permit to buffer socket data, reading not only asked bytes, but available number of bytes when possible.

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	buf
private static int	BUF_SIZE
private int	end
private int	pos

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
ReadAheadBufferedStream(java.io.InputStream in)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
private void	fillBuffer(int minNeededBytes) Fill buffer with required length, or available bytes.
boolean	markSupported()
int	read() Reading one byte from cache of socket if needed.
int	read(byte[] externalBuf, int off, int len) Returing byte array, from cache of reading socket if needed.
void	reset()
long	skip(long n)

Methods inherited from class java.io.FilterInputStream

mark, read

Methods inherited from class java.lang.Object

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

Field Detail

BUF_SIZE

private static final int BUF_SIZE

See Also:

Constant Field Values

buf

private volatile byte[] buf

end

private int end

pos

private int pos

Constructor Detail

ReadAheadBufferedStream

public ReadAheadBufferedStream(java.io.InputStream in)

Method Detail

read

public int read()
         throws java.io.IOException

Reading one byte from cache of socket if needed.

Overrides:

read in class java.io.FilterInputStream

Returns:

byte value

Throws:

java.io.IOException - if socket reading error.

read

public int read(byte[] externalBuf,
                int off,
                int len)
         throws java.io.IOException

Returing byte array, from cache of reading socket if needed.

Overrides:

read in class java.io.FilterInputStream

Parameters:

externalBuf - buffer to fill

off - offset

len - length to read

Returns:

number of added bytes

Throws:

java.io.IOException - if exception during socket reading

fillBuffer

private void fillBuffer(int minNeededBytes)
                 throws java.io.IOException

Fill buffer with required length, or available bytes.

Parameters:

minNeededBytes - asked number of bytes

Throws:

java.io.IOException - in case of failing reading stream.

skip

public long skip(long n)
          throws java.io.IOException

Overrides:

skip in class java.io.FilterInputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.FilterInputStream

Throws:

java.io.IOException

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.FilterInputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.FilterInputStream

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.FilterInputStream

Throws:

java.io.IOException