/**
* Gets and writes the first comments of a file.
*
* @param file The selected file to get the comments.
* @param writer The writer which is going to write the comments.
* @throws IOException If an error occurred with the file.
*/
private static void writeFileHeaderComments(final File file, final LDIFEntryWriter writer)
throws IOException {
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(file));
String comment = br.readLine();
while (comment != null && comment.startsWith("#")) {
writer.writeComment(comment.replaceAll("# ", "").replaceAll("#", ""));
comment = br.readLine();
}
} catch (IOException ex) {
throw ex;
} finally {
StaticUtils.close(br);
}
}
/**
* Updates the config file during the upgrade process.
*
* @param configPath The original path to the file.
* @param filter The filter to select entries. Only useful for modify change type.
* @param changeType The change type which must be applied to ldif lines.
* @param ldifLines The change record ldif lines. For ADD change type, the first line must be the
* dn. For DELETE change type, the first and only line must be the dn.
* @throws IOException If an Exception occurs during the input output methods.
* @return The changes number that have occurred.
*/
static int updateConfigFile(
final String configPath,
final Filter filter,
final ChangeOperationType changeType,
final String... ldifLines)
throws IOException {
final File original = new File(configPath);
final File copyConfig = File.createTempFile("copyConfig", ".tmp", original.getParentFile());
int changeCount = 0;
LDIFEntryReader entryReader = null;
LDIFEntryWriter writer = null;
try {
final Schema schema = getUpgradeSchema();
entryReader = new LDIFEntryReader(new FileInputStream(configPath)).setSchema(schema);
writer = new LDIFEntryWriter(new FileOutputStream(copyConfig));
writer.setWrapColumn(80);
// Writes the header on the new file.
writer.writeComment(INFO_CONFIG_FILE_HEADER.get());
writer.setWrapColumn(0);
boolean entryAlreadyExist = false;
DN ldifDN = null;
if (filter == null && (changeType == ADD || changeType == DELETE)) {
// The first line should start with dn:
ldifDN = DN.valueOf(ldifLines[0].replaceFirst("dn: ", ""));
}
final Filter f = filter != null ? filter : Filter.alwaysFalse();
final Matcher matcher = f.matcher(schema);
while (entryReader.hasNext()) {
Entry entry = entryReader.readEntry();
final DN entryDN = entry.getName();
// Searching for the related entries
if (changeType == MODIFY && matcher.matches(entry) == ConditionResult.TRUE) {
try {
final ModifyRequest mr =
Requests.newModifyRequest(readLDIFLines(entryDN, changeType, ldifLines));
entry = Entries.modifyEntryPermissive(entry, mr.getModifications());
changeCount++;
logger.debug(
LocalizableMessage.raw("The following entry has been modified : %s", entryDN));
} catch (Exception ex) {
logger.error(LocalizableMessage.raw(ex.getMessage()));
}
}
if (entryDN.equals(ldifDN)) {
logger.debug(LocalizableMessage.raw("Entry %s found", entryDN));
entryAlreadyExist = true;
if (changeType == DELETE) {
entry = null;
changeCount++;
logger.debug(
LocalizableMessage.raw("The following entry has been deleted : %s", entryDN));
}
}
if (entry != null) {
writer.writeEntry(entry);
}
}
if (changeType == ADD && !entryAlreadyExist) {
final AddRequest ar = Requests.newAddRequest(ldifLines);
writer.writeEntry(ar);
logger.debug(
LocalizableMessage.raw(
"Entry successfully added %s in %s", ldifDN, original.getAbsolutePath()));
changeCount++;
}
} catch (Exception ex) {
throw new IOException(ex.getMessage());
} finally {
// The reader and writer must be close before renaming files.
// Otherwise it causes exceptions under windows OS.
StaticUtils.close(entryReader, writer);
}
try {
// Renaming the file, overwriting previous one.
rename(copyConfig, new File(configPath));
} catch (IOException e) {
logger.error(LocalizableMessage.raw(e.getMessage()));
deleteRecursively(original);
throw e;
}
return changeCount;
}