org.apache.jackrabbit.vfs.ext.ds

Class LazyFileContentInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.commons.io.input.ProxyInputStream

org.apache.commons.io.input.AutoCloseInputStream

org.apache.jackrabbit.vfs.ext.ds.LazyFileContentInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

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

This input stream delays opening the file content 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

Fields

Modifier and Type	Field and Description
protected org.apache.commons.vfs2.FileObject	fileObject The file object to read from.
protected boolean	opened True if the input stream was opened.

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
LazyFileContentInputStream(org.apache.commons.vfs2.FileObject fileObject) 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()
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

afterRead, finalize

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

beforeRead, handleIOException

Methods inherited from class java.lang.Object

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

Field Detail

fileObject

protected final org.apache.commons.vfs2.FileObject fileObject

The file object 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 content after the stream was closed).

Constructor Detail

LazyFileContentInputStream

public LazyFileContentInputStream(org.apache.commons.vfs2.FileObject fileObject)
                           throws org.apache.commons.vfs2.FileSystemException

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

Parameters:

fileObject - the file

Throws:

org.apache.commons.vfs2.FileNotFoundException

org.apache.commons.vfs2.FileSystemException

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.ProxyInputStream

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

Specified by:

close in interface AutoCloseable

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.ProxyInputStream

Throws:

IOException

read

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

Overrides:

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

Throws:

IOException