/**
* parses a log entry line in default combined format (see <a
* href="http://wiki.nginx.org/NginxHttpLogModule#log_format" >HttpLogModule#log_format</a>)
*
* @param line single log entry line in combined format
* @return true if entry matched expected format
*/
public boolean populate(String line) {
_line = line;
_date.clear();
_requestLine.clear();
_previous = null;
_field = 0;
char[] chars = new char[line.length()];
line.getChars(0, line.length(), chars, 0);
int last = -1;
FieldState state = FieldState.NONE;
for (int i = 0; i < chars.length; i++) {
char c = chars[i];
switch (state) {
case NONE:
switch (c) {
case ' ':
// set("");
last = i;
break;
case '"':
// new quoted field;
state = FieldState.QUOTES;
break;
case '[':
state = FieldState.BRACKETS;
break;
default:
state = FieldState.NORMAL;
}
break;
case NORMAL:
if (c == ' ') {
// end of field
set(line.substring(last + 1, i));
last = i;
state = FieldState.NONE;
}
break;
case BRACKETS:
if (c == ']' && (chars.length == i + 1 || chars[i + 1] == ' ')) {
state = FieldState.NORMAL;
}
break;
case QUOTES:
if (c == '"' && (chars.length == i + 1 || chars[i + 1] == ' ')) {
state = FieldState.NORMAL;
}
break;
default:
throw new IllegalStateException("" + state);
}
}
if (last + 1 < line.length()) {
set(line.substring(last + 1));
}
return _field == 9 && _status > 0 && _length >= 0;
}
