Scan Method
Scans the compressed archive.
Syntax
public void scan();
Remarks
This method will scan the gzip archive specified by ArchiveFile. The archive will be read, the header will be checked, and the stored filename will be written to FileCompressedName.
Unlike in the Zip, Tar, and Jar beans, it is never necessary to invoke this method, and it will not be automatically invoked by Extract. Suggested uses for this method would be to check that the file is a gzip file, or to determine an appropriate value for FileDecompressedName.