[vfs] more FileUtils

[Mario Ivankovits]

B. K. Oxley (binkley) wrote:
I'd like to see some more utility methods for manipulating file 
objects.  For example, much of my code needs:

    void saveAs() throws IOException;
    void moveTo() throws IOException;
    void copyTo() throws IOException;
For sure, we could introduce a FileUtils, but ...
private static void saveMaybeBackup(final WhimFile original,
... this "MaybeBackup" is a thing we could discuss at its own.
How should a backup be done and named?
a) backup to *.bak
b) use versioning - e.g. *.bak_01, *.bak_02
b.1) with max versions
c) use timestamping - e.g. *.bak_20050101
c.1) but not more than 20 backups
and so on.
Said that, I think, if such a method allows a "BackupPolicy" and we 
provide SimpleBackupPolicy (case a) and NoBackupPolicy this could be a 
real enhancement.

Could you please post a proposal about the methods and its functions you 
would like to see. This would be a great start.

Thanks!
Mario
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