src/main/java/org/codehaus/plexus/archiver/util/ResourceUtils.java
public static boolean isSame( PlexusIoResource resource, File file )
    {
        if ( resource instanceof FileSupplier )
        {
            File resourceFile = ((FileSupplier) resource).getFile();
            return file.equals( resourceFile );
        }
        return false;
    }
public static boolean isSame( PlexusIoResource resource, File file )
    {
        if ( resource instanceof FileSupplier )
        {
            File resourceFile = ((FileSupplier) resource).getFile();
            return file.equals( resourceFile );
        }
        return false;
    }
Checks, whether the resource and the file are identical.