/**
* Tries to restore the key
*
* @return rest of key on success, otherwise empty string
* @throws IOException on Reader-Error
*/
private String fixKey() throws IOException {
StringBuilder key = new StringBuilder();
int lookahead_used = 0;
char currentChar;
// Find a char which ends key (','&&'\n') or entryfield ('='):
do {
currentChar = (char) read();
key.append(currentChar);
lookahead_used++;
} while ((currentChar != ',' && currentChar != '\n' && currentChar != '=')
&& (lookahead_used < LOOKAHEAD));
// Consumed a char too much, back into reader and remove from key:
unread(currentChar);
key.deleteCharAt(key.length() - 1);
// Restore if possible:
switch (currentChar) {
case '=':
// Get entryfieldname, push it back and take rest as key
key = key.reverse();
boolean matchedAlpha = false;
for (int i = 0; i < key.length(); i++) {
currentChar = key.charAt(i);
/// Skip spaces:
if (!matchedAlpha && currentChar == ' ') {
continue;
}
matchedAlpha = true;
// Begin of entryfieldname (e.g. author) -> push back:
unread(currentChar);
if (currentChar == ' ' || currentChar == '\n') {
/*
* found whitespaces, entryfieldname completed -> key in
* keybuffer, skip whitespaces
*/
StringBuilder newKey = new StringBuilder();
for (int j = i; j < key.length(); j++) {
currentChar = key.charAt(j);
if (!Character.isWhitespace(currentChar)) {
newKey.append(currentChar);
}
}
// Finished, now reverse newKey and remove whitespaces:
_pr.addWarning(
Globals.lang("Line %0: Found corrupted BibTeX-key.", String.valueOf(line)));
key = newKey.reverse();
}
}
break;
case ',':
_pr.addWarning(
Globals.lang(
"Line %0: Found corrupted BibTeX-key (contains whitespaces).",
String.valueOf(line)));
case '\n':
_pr.addWarning(
Globals.lang(
"Line %0: Found corrupted BibTeX-key (comma missing).", String.valueOf(line)));
break;
default:
// No more lookahead, give up:
unreadBuffer(key);
return "";
}
return removeWhitespaces(key).toString();
}
