/**
* If there is a note specified at the current line and the subsequent lines, a {@linkplain Note}
* representation is returned, otherwise <tt>null</tt>
*
* @return a note, if one is specified at the current position in text, otherwise <tt>null</tt>
*/
public Note getNote() throws SyntaxError {
if (section == 0) {
throw new IllegalStateException("not all objects have been read");
}
if (currentLine() == null) {
throw new IllegalStateException("nothing to read");
}
String[] parts = grep.parse("\\s*(\\*|\\+)(\\d+)\\s*(.+)", currentLine());
if (parts == null) {
return null;
}
boolean consuming = parts[0].equals("+");
int number = -1;
try {
number = Integer.parseInt(parts[1]);
} catch (NumberFormatException nfe) {
/* empty */
}
if (number < 0) {
throw new SyntaxError(this, "bad note number: " + parts[1]);
}
String obj = parts[2];
Lifeline line = diagram.getLifeline(obj);
if (line == null) {
throw new SyntaxError(this, obj + " does not exist");
}
int oldBegin = getLineBegin();
int oldEnd = getLineEnd();
line = line.getRightmost();
List<String> desc = new LinkedList<String>();
boolean more;
do {
if (!advance(false)) {
reset(oldBegin, oldEnd);
throw new SyntaxError(this, "The note is not closed.");
}
more = !currentLine().trim().equals(parts[0] + parts[1]);
} while (more && desc.add(currentLine()));
if (desc.size() == 0) {
reset(oldBegin, oldEnd);
throw new SyntaxError(this, "The note is empty.");
}
String[] noteText = desc.toArray(new String[0]);
URI link = null;
if (noteText.length == 1) {
String linkString = noteText[0].trim();
if (linkString.startsWith("link:")) {
try {
linkString = linkString.substring(5).trim();
link = new URI(linkString);
if (link.getPath() == null) {
throw new SyntaxError(this, "Empty path in URI: " + linkString);
}
noteText[0] = link.getPath();
} catch (URISyntaxException e) {
throw new SyntaxError(this, "Bad URI syntax: " + e.getMessage());
}
}
}
Note note = new Note(line, number, noteText, consuming);
note.setLink(link);
return note;
}
