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1
17 package org.columba.mail.folder.mbox;
18
19 import java.io.IOException  ;
20 import java.util.Iterator ;
21 import java.util.LinkedList ;
22 import java.util.List ;
23 import java.util.regex.Matcher ;
24 import java.util.regex.Pattern ;
25
26 import org.columba.ristretto.io.Source;
27 import org.columba.ristretto.parser.CharSequenceSearcher;
28
29 public class MboxParser {
30
31 private static final Pattern YEAR_DIGITS = Pattern.compile("\\d{4}$");
32
33 public static MboxMessage[] parseMbox(Source mailboxSource) throws IOException {
34 Matcher mboxHeaderMatcher = YEAR_DIGITS.matcher("");
35 List messages = new LinkedList ();
36
37 CharSequenceSearcher searcher = new CharSequenceSearcher("From ");
38 List boundaries = searcher.match(mailboxSource);
39
40 Iterator it = boundaries.iterator();
41 int start = ((Integer ) it.next()).intValue();
42 int lastEnd = findNext(mailboxSource, start + 5, '\n') + 1;
43
44 int newUid = 0;
45
46
47 while (it.hasNext()) {
48 start = ((Integer ) it.next()).intValue();
49
50 int possibleEnd = findNext(mailboxSource, start + 5, '\n') + 1;
51
52 mboxHeaderMatcher.reset(mailboxSource.subSequence(start, possibleEnd-1));
53 while( !mboxHeaderMatcher.find() && it.hasNext()) {
54 start = ((Integer ) it.next()).intValue();
55 possibleEnd = findNext(mailboxSource, start + 5, '\n') + 1;
56 mboxHeaderMatcher.reset(mailboxSource.subSequence(start, possibleEnd));
57 }
58
59 messages.add(new MboxMessage(new Integer (newUid++), lastEnd,
60 start - lastEnd));
61
62 lastEnd = possibleEnd;
63 }
64
65 messages.add(new MboxMessage(new Integer (newUid++), lastEnd,
66 mailboxSource.length() - lastEnd));
67
68 return (MboxMessage[]) messages.toArray(new MboxMessage[0]);
69 }
70
71 private static int findNext(Source source, int pos, char ch) {
72 pos++;
73 while (!source.isEOF()) {
74 if (source.charAt(pos) == ch) {
75 return pos;
76 } else {
77 pos++;
78 }
79 }
80
81 return -1;
82 }
83
84 }
85 |
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