org.jboss.vfs.util

Class LazyInputStream

java.lang.Object

java.io.InputStream

org.jboss.vfs.util.LazyInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class LazyInputStream
extends java.io.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 and Description
private VirtualFile	file
private java.io.InputStream	stream

Constructor Summary

Constructors

Constructor and Description
LazyInputStream(VirtualFile file)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
void	mark(int readlimit)
boolean	markSupported()
protected java.io.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 java.lang.Object

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

Field Detail

file

private VirtualFile file

stream

private java.io.InputStream stream

Constructor Detail

LazyInputStream

public LazyInputStream(VirtualFile file)

Method Detail

openStream

protected java.io.InputStream openStream()
                                  throws java.io.IOException

Open stream.

Returns:

file's stream

Throws:

java.io.IOException - for any IO error

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

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

skip

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

Overrides:

skip 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

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

mark

public void mark(int readlimit)

Overrides:

mark in class java.io.InputStream

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.InputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.InputStream