Class CountdownInputStream

java.lang.Object

java.io.InputStream

org.hsqldb.lib.CountdownInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class CountdownInputStream
extends InputStream

Counts down from a specified value the number of bytes actually read from the wrapped InputStream.

Returns minus one (-1) early from readXXX methods if the count down reaches zero (0) before the end of the wrapped InputStream is encountered.

This class is especially useful when a fixed number of bytes is to be read from an InputStream that is in turn to be used as the source for an InputStreamReader.

Since:

1.9.0

Author:

Campbell Burnet (campbell-burnet@users dot sourceforge.net)

Constructor Summary

Constructors

Constructor	Description
CountdownInputStream(InputStream is)

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
long	getCount()
int	read()
int	read(byte[] buf)
int	read(byte[] buf, int off, int len)
void	setCount(long count)
long	skip(long count)

Methods inherited from class InputStream

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

Methods inherited from class Object

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

Constructor Details

CountdownInputStream

public CountdownInputStream(InputStream is)

Method Details

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] buf)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

read

public int read(byte[] buf,
 int off,
 int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

skip

public long skip(long count)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

getCount

public long getCount()

setCount

public void setCount(long count)