1 /*
2 * DavMail POP/IMAP/SMTP/CalDav/LDAP Exchange Gateway
3 * Copyright (C) 2009 Mickael Guessant
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 */
19 package davmail.exchange;
20
21 import java.io.BufferedReader;
22 import java.io.IOException;
23 import java.io.Reader;
24
25 /**
26 * ICS Buffered Reader.
27 * Read events by line, handle multiple line elements
28 */
29 public class ICSBufferedReader extends BufferedReader {
30 protected String nextLine;
31 protected final StringBuilder currentLine = new StringBuilder(75);
32
33 /**
34 * Create an ICS reader on the provided reader
35 *
36 * @param in input reader
37 * @throws IOException on error
38 */
39 public ICSBufferedReader(Reader in) throws IOException {
40 super(in);
41 nextLine = super.readLine();
42 }
43
44 /**
45 * Read a line from input reader, unwrap long lines.
46 */
47 @Override
48 public String readLine() throws IOException {
49 if (nextLine == null) {
50 return null;
51 } else {
52 currentLine.setLength(0);
53 currentLine.append(nextLine);
54 nextLine = super.readLine();
55 while (nextLine != null && !(nextLine.length() == 0) &&
56 (nextLine.charAt(0) == ' ' || nextLine.charAt(0) == '\t'
57 // workaround for broken items with \n as first line character
58 || nextLine.charAt(0) == '\\'
59 // workaround for Exchange 2010 bug
60 || nextLine.charAt(0) == ':')) {
61 // Timezone ends with \n => next line starts with :
62 if (nextLine.charAt(0) == ':') {
63 currentLine.append(nextLine);
64 } else {
65 currentLine.append(nextLine.substring(1));
66 }
67 nextLine = super.readLine();
68 }
69 return currentLine.toString();
70 }
71 }
72 }