private static void preserveFiles(String filename) {
File oldFile = new File(filename);
File saveFile = new File(filename + ".temp");
SimpleDateFormat sdf = new SimpleDateFormat("ddMMMyy_HHmm");
String nowStr = sdf.format(new Date());
String retainFilename = makeBackupFilename(filename, nowStr);
File retainFile = new File(retainFilename);
if (retainFile.exists()) retainFile.delete();
String oldestSave = JConfig.queryConfiguration("save.file.4", "");
if (oldestSave.length() != 0) {
File oldest = new File(oldestSave);
if (oldest.exists()) {
backupByDate(filename, oldest);
}
}
for (int i = 4; i > 0; i--) {
JConfig.setConfiguration(
"save.file." + i, JConfig.queryConfiguration("save.file." + (i - 1), ""));
}
File keepFile = new File(retainFilename);
if (!oldFile.renameTo(keepFile)) {
JConfig.log()
.logDebug(
"Renaming the old file ("
+ oldFile
+ ") to the retain file ("
+ keepFile
+ ") failed!");
}
JConfig.setConfiguration("save.file.0", retainFilename);
File standard = new File(filename);
if (!saveFile.renameTo(standard)) {
JConfig.log()
.logDebug(
"Renaming the new file ("
+ saveFile
+ ") to the standard filename ("
+ standard
+ ") failed!");
}
}
private static void backupByDate(String filename, File oldest) {
SimpleDateFormat justDateFmt = new SimpleDateFormat("ddMMMyy");
String justDate = justDateFmt.format(new Date());
String oldBackup = makeBackupFilename(filename, justDate);
File oldDateBackup = new File(oldBackup);
if (oldDateBackup.exists()) {
oldDateBackup.delete();
File newDateBackup = new File(oldBackup);
oldest.renameTo(newDateBackup);
} else {
oldest.renameTo(oldDateBackup);
String oldestByDate = JConfig.queryConfiguration("save.bydate.4", "");
for (int i = 4; i > 0; i--) {
JConfig.setConfiguration(
"save.bydate." + i, JConfig.queryConfiguration("save.bydate." + (i - 1), ""));
}
JConfig.setConfiguration("save.bydate.0", oldBackup);
File deleteMe = new File(oldestByDate);
deleteMe.delete();
}
}
