net.sourceforge.scuba.smartcards
Interface FileSystemStructured

All Known Implementing Classes:

AbstractFileSystemStructured

public interface FileSystemStructured

Interface for minimal ISO file systems. Implement this interface to tell CardFileInputStream how to deal with card files.

Author:

Martijn Oostdijk (martijn.oostdijk@gmail.com)

Method Summary

FileInfo[]	getSelectedPath() Identifies the currently selected file.
byte[]	readBinary(int offset, int length) Reads a fragment of the currently selected file.
void	selectFile(short fid) Selects a file.

Method Detail

selectFile

void selectFile(short fid)
                throws CardServiceException

Selects a file.

Parameters:

fid - indicates which file to select

Throws:

CardServiceException - in case of error

readBinary

byte[] readBinary(int offset,
                  int length)
                  throws CardServiceException

Reads a fragment of the currently selected file.

Parameters:

offset - offset

length - the number of bytes to read (the result may be shorter, though)

Returns:

contents of currently selected file, contains at least 1 byte, at most length.

Throws:

CardServiceException - on error (for instance: end of file)

getSelectedPath

FileInfo[] getSelectedPath()

Identifies the currently selected file.

Returns:

a path of file identifiers or null.