org.zkoss.poi.util

Class BlockingInputStream

java.lang.Object

java.io.InputStream

org.zkoss.poi.util.BlockingInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class BlockingInputStream
extends InputStream

Implementation of a BlockingInputStream to provide data to RawDataBlock that expects data in 512 byte chunks. Useful to read data from slow (ie, non FileInputStream) sources, for example when reading an OLE2 Document over a network. Possible extentions: add a timeout. Curently a call to read(byte[]) on this class is blocking, so use at your own peril if your underlying stream blocks.

Author:

Jens Gerhard, aviks - documentation cleanups.

Field Summary

Fields

Modifier and Type	Field and Description
protected InputStream	is

Constructor Summary

Constructors

Constructor and Description
BlockingInputStream(InputStream is)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
void	mark(int readLimit)
boolean	markSupported()
int	read()
int	read(byte[] bf) We had to revert to byte per byte reading to keep with slow network connections on one hand, without missing the end-of-file.
int	read(byte[] bf, int s, int l)
void	reset()
long	skip(long n)

Methods inherited from class java.lang.Object

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

Field Detail

is

protected InputStream is

Constructor Detail

BlockingInputStream

public BlockingInputStream(InputStream is)

Method Detail

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class InputStream

Throws:

IOException

mark

public void mark(int readLimit)

Overrides:

mark in class InputStream

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] bf)
         throws IOException

We had to revert to byte per byte reading to keep with slow network connections on one hand, without missing the end-of-file. This is the only method that does its own thing in this class everything else is delegated to aggregated stream. THIS IS A BLOCKING BLOCK READ!!!

Overrides:

read in class InputStream

Throws:

IOException

read

public int read(byte[] bf,
                int s,
                int l)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException