de.schlichtherle.io.rof
Class ChannelReadOnlyFile

java.lang.Object
  de.schlichtherle.io.rof.AbstractReadOnlyFile
      de.schlichtherle.io.rof.ChannelReadOnlyFile

All Implemented Interfaces:

ReadOnlyFile

public class ChannelReadOnlyFile
extends AbstractReadOnlyFile

A ReadOnlyFile implementation using file channels.

Version:

TrueZIP 6.7

Author:

Christian Schlichtherle

Constructor Summary

ChannelReadOnlyFile(File file)

Method Summary

void	close()
long	getFilePointer()
long	length()
int	read()
int	read(byte[] buf, int off, int len) Reads up to len bytes of data from this read only file into the given array.
void	seek(long fp) Sets the file pointer offset, measured from the beginning of this file, at which the next read occurs.

Methods inherited from class de.schlichtherle.io.rof.AbstractReadOnlyFile

read, readFully, readFully, skipBytes

Methods inherited from class java.lang.Object

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

Constructor Detail

ChannelReadOnlyFile

public ChannelReadOnlyFile(File file)
                    throws FileNotFoundException

Throws:

FileNotFoundException

Method Detail

length

public long length()
            throws IOException

Throws:

IOException

getFilePointer

public long getFilePointer()
                    throws IOException

Throws:

IOException

seek

public void seek(long fp)
          throws IOException

Description copied from interface: ReadOnlyFile

Sets the file pointer offset, measured from the beginning of this file, at which the next read occurs. Whether the offset may be set beyond the end of the file is up to the implementor. For example, the SimpleReadOnlyFile subclasses RandomAccessFile and passes "r" as a parameter to the superclass constructor. On the Windows platform, this implementation allows to seek past the end of file, but on the Linux platform it doesn't.

Parameters:

fp - The offset position, measured in bytes from the beginning of the file, at which to set the file pointer.

Throws:

IOException - If pos is less than 0 or if an I/O error occurs.

read

public int read()
         throws IOException

Throws:

IOException

read

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

Description copied from interface: ReadOnlyFile

Reads up to len bytes of data from this read only file into the given array. This method blocks until at least one byte of input is available.

Parameters:

buf - The buffer to fill with data.

off - The start offset of the data.

len - The maximum number of bytes to read.

Returns:

The total number of bytes read, or -1 if there is no more data because the end of the file has been reached.

Throws:

IOException - On any I/O related issue.

close

public void close()
           throws IOException

Throws:

IOException