org.apache.commons.io.input

Interface Tailer.RandomAccessResourceBridge

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable

Enclosing class:

Tailer

public static interface Tailer.RandomAccessResourceBridge
extends java.io.Closeable

Bridges access to a resource for random access, normally a file. Allows substitution of remote files for example using jCIFS.

Since:

2.12.0

Method Summary

Modifier and Type	Method and Description
long	getPointer() Gets the current offset in this tailable.
int	read(byte[] b) Reads up to b.length bytes of data from this tailable into an array of bytes.
void	seek(long pos) Sets the file-pointer offset, measured from the beginning of this tailable, at which the next read or write occurs.

Methods inherited from interface java.io.Closeable

close

Method Detail

getPointer

long getPointer()
         throws java.io.IOException

Gets the current offset in this tailable.

Returns:

the offset from the beginning of the tailable, in bytes, at which the next read or write occurs.

Throws:

java.io.IOException - if an I/O error occurs.

read

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

Reads up to b.length bytes of data from this tailable into an array of bytes. This method blocks until at least one byte of input is available.

Parameters:

b - the buffer into which the data is read.

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of this tailable has been reached.

Throws:

java.io.IOException - If the first byte cannot be read for any reason other than end of tailable, or if the random access tailable has been closed, or if some other I/O error occurs.

seek

void seek(long pos)
   throws java.io.IOException

Sets the file-pointer offset, measured from the beginning of this tailable, at which the next read or write occurs. The offset may be set beyond the end of the tailable. Setting the offset beyond the end of the tailable does not change the tailable length. The tailable length will change only by writing after the offset has been set beyond the end of the tailable.

Parameters:

pos - the offset position, measured in bytes from the beginning of the tailable, at which to set the tailable pointer.

Throws:

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