com.mysql.cj.protocol

Class ReadAheadInputStream

java.lang.Object

java.io.InputStream

com.mysql.cj.protocol.ReadAheadInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class ReadAheadInputStream
extends java.io.InputStream

A non-blocking buffered input stream. Reads more if it can, won't block to fill the buffer, only blocks to satisfy a request of read(byte[])

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	buf
protected int	currentPosition
private static int	DEFAULT_BUFFER_SIZE
protected boolean	doDebug
protected int	endOfCurrentData
protected Log	log
private java.io.InputStream	underlyingStream

Constructor Summary

Constructors

Constructor and Description
ReadAheadInputStream(java.io.InputStream toBuffer, boolean debug, Log logTo)
ReadAheadInputStream(java.io.InputStream toBuffer, int bufferSize, boolean debug, Log logTo)

Method Summary

Modifier and Type	Method and Description
int	available()
private void	checkClosed()
void	close()
private void	fill(int readAtLeastTheseManyBytes)
boolean	markSupported()
int	read()
int	read(byte[] b, int off, int len)
private int	readFromUnderlyingStreamIfNecessary(byte[] b, int off, int len)
long	skip(long n)

Methods inherited from class java.io.InputStream

mark, read, reset

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BUFFER_SIZE

private static final int DEFAULT_BUFFER_SIZE

See Also:

Constant Field Values

underlyingStream

private java.io.InputStream underlyingStream

buf

private byte[] buf

endOfCurrentData

protected int endOfCurrentData

currentPosition

protected int currentPosition

doDebug

protected boolean doDebug

log

protected Log log

Constructor Detail

ReadAheadInputStream

public ReadAheadInputStream(java.io.InputStream toBuffer,
                            boolean debug,
                            Log logTo)

ReadAheadInputStream

public ReadAheadInputStream(java.io.InputStream toBuffer,
                            int bufferSize,
                            boolean debug,
                            Log logTo)

Method Detail

fill

private void fill(int readAtLeastTheseManyBytes)
           throws java.io.IOException

Throws:

java.io.IOException

readFromUnderlyingStreamIfNecessary

private int readFromUnderlyingStreamIfNecessary(byte[] b,
                                                int off,
                                                int len)
                                         throws java.io.IOException

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.InputStream

Throws:

java.io.IOException

checkClosed

private void checkClosed()
                  throws java.io.IOException

Throws:

java.io.IOException

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.InputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.InputStream

skip

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

Overrides:

skip in class java.io.InputStream

Throws:

java.io.IOException