org.apache.jackrabbit.core.data
Class LazyFileInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          org.apache.commons.io.input.ProxyInputStream
              org.apache.commons.io.input.AutoCloseInputStream
                  org.apache.jackrabbit.core.data.LazyFileInputStream

All Implemented Interfaces:

Closeable

public class LazyFileInputStream
extends org.apache.commons.io.input.AutoCloseInputStream

This input stream delays opening the file until the first byte is read, and closes and discards the underlying stream as soon as the end of input has been reached or when the stream is explicitly closed.

Field Summary

protected FileDescriptor	fd The file descriptor to use.
protected File	file The file to read from.
protected boolean	opened True if the input stream was opened.

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

LazyFileInputStream(File file)
Creates a new LazyFileInputStream for the given file.

LazyFileInputStream(FileDescriptor fd)
Creates a new LazyFileInputStream for the given file descriptor.

LazyFileInputStream(String name)
Creates a new LazyFileInputStream for the given file.

Method Summary

int	available()
void	close()
void	mark(int readlimit)
boolean	markSupported()
protected void	open() Open the stream if required.
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()
long	skip(long n)

Methods inherited from class org.apache.commons.io.input.AutoCloseInputStream

finalize

Methods inherited from class java.lang.Object

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

Field Detail

fd

protected final FileDescriptor fd

The file descriptor to use.

file

protected final File file

The file to read from.

opened

protected boolean opened

True if the input stream was opened. It is also set to true if the stream was closed without reading (to avoid opening the file after the stream was closed).

Constructor Detail

LazyFileInputStream

public LazyFileInputStream(File file)
                    throws FileNotFoundException

Creates a new LazyFileInputStream for the given file. If the file is unreadable, a FileNotFoundException is thrown. The file is not opened until the first byte is read from the stream.

Parameters:

file - the file

Throws:

FileNotFoundException

LazyFileInputStream

public LazyFileInputStream(FileDescriptor fd)

Creates a new LazyFileInputStream for the given file descriptor. The file is not opened until the first byte is read from the stream.

Parameters:

fdObj -

LazyFileInputStream

public LazyFileInputStream(String name)
                    throws FileNotFoundException

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

Parameters:

name -

Throws:

FileNotFoundException

Method Detail

open

protected void open()
             throws IOException

Open the stream if required.

Throws:

IOException

read

public int read()
         throws IOException

Overrides:

read in class org.apache.commons.io.input.AutoCloseInputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class org.apache.commons.io.input.ProxyInputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Overrides:

close in class org.apache.commons.io.input.AutoCloseInputStream

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class org.apache.commons.io.input.ProxyInputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class org.apache.commons.io.input.ProxyInputStream

mark

public void mark(int readlimit)

Overrides:

mark in class org.apache.commons.io.input.ProxyInputStream

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class org.apache.commons.io.input.ProxyInputStream

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class org.apache.commons.io.input.AutoCloseInputStream

Throws:

IOException

read

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

Overrides:

read in class org.apache.commons.io.input.AutoCloseInputStream

Throws:

IOException