com.aspc.webdav

Class LazyFileInputStream

java.lang.Object

java.io.InputStream

com.aspc.webdav.LazyFileInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class LazyFileInputStream
extends java.io.InputStream

This Class implements an InputStream that provides the same functionality as a FileInputStream but opens the file by the first file access.
THREAD MODE: SINGLE-THREADED

Since:

3 Oct 2008

Author:

Lahav

Constructor Summary

Constructors

Constructor and Description
LazyFileInputStream(java.io.File file) Creates a new LazyFileInputStream for the given file.
LazyFileInputStream(java.io.FileDescriptor fdObj) Creates a new LazyFileInputStream for the given file descriptor .
LazyFileInputStream(java.lang.String name) Creates a new LazyFileInputStream for the given file.

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
void	mark(int readlimit)
boolean	markSupported()
void	open() Opens the underlying file input stream in neccessairy.
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

Constructor Detail

LazyFileInputStream

public LazyFileInputStream(java.io.File file)
                    throws java.io.FileNotFoundException

Creates a new LazyFileInputStream for the given file. If the file is unreadably, a FileNotFoundException is thrown.

Parameters:

file - the file

Throws:

java.io.FileNotFoundException - no file

LazyFileInputStream

public LazyFileInputStream(java.io.FileDescriptor fdObj)

Creates a new LazyFileInputStream for the given file descriptor .

Parameters:

fdObj - the file

LazyFileInputStream

public LazyFileInputStream(java.lang.String name)
                    throws java.io.FileNotFoundException

Creates a new LazyFileInputStream for the given file. If the file is unreadably, a FileNotFoundException is thrown.

Parameters:

name - the name

Throws:

java.io.FileNotFoundException - no file

Method Detail

open

public void open()
          throws java.io.IOException

Opens the underlying file input stream in neccessairy.

Throws:

java.io.IOException - if an IO exception occurs.

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Returns:

the value

Throws:

java.io.IOException - if an IO exception occurs.

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.InputStream

Returns:

the value

Throws:

java.io.IOException - if an IO exception occurs.

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 - if an IO exception occurs.

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.InputStream

Throws:

java.io.IOException - if an IO exception occurs.

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.InputStream

Returns:

the value

mark

public void mark(int readlimit)

Overrides:

mark in class java.io.InputStream

skip

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

Overrides:

skip in class java.io.InputStream

Returns:

the value

Throws:

java.io.IOException - if an IO exception occurs.

read

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

Overrides:

read in class java.io.InputStream

Returns:

the value

Throws:

java.io.IOException - if an IO exception occurs.

read

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

Overrides:

read in class java.io.InputStream

Returns:

the value

Throws:

java.io.IOException - if an IO exception occurs.