Class LazyInputStream

java.lang.Object

java.io.InputStream

org.jboss.vfs.util.LazyInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class LazyInputStream
extends InputStream

Lazy input stream.

Delaying opening stream from underlying virtual file as long as possible. Won't be opened if not used at all.

Synchronization is very simplistic, as it's highly unlikely there will be a lot of concurrent requests.

Field Summary

Fields

Modifier and Type	Field	Description
private VirtualFile	file
private InputStream	stream

Constructor Summary

Constructors

Constructor	Description
LazyInputStream(VirtualFile file)

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
void	mark(int readlimit)
boolean	markSupported()
protected InputStream	openStream()	Open stream.
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()
long	skip(long n)

Methods inherited from class InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class Object

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

Field Details

file

private VirtualFile file

stream

private InputStream stream

Constructor Details

LazyInputStream

public LazyInputStream(VirtualFile file)

Method Details

openStream

protected InputStream openStream()
                          throws IOException

Open stream.

Returns:

file's stream

Throws:

IOException - for any IO error

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

read

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

Overrides:

read in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available 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

mark

public void mark(int readlimit)

Overrides:

mark in class InputStream

reset

public void reset()
           throws IOException

Overrides:

reset in class InputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream