/**
* Helper method to set the start date while parsing a date.
*
* @param firstDate The string based representation of a date (number only).
* @param date The <tt>HistoricalDate</tt> object to be updated.
*/
private void setStartDate(String firstDate, HistoricalDate date) {
// create a date instance
try {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy");
if (firstDate.length() < 3) {
firstDate = firstDate + "00";
} else if (date.getPrecision() == null) {
date.setPrecision(Precision.YEAR);
}
Date d = formatter.parse(firstDate);
date.setStartDate(d);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Helper method to set the end date while parsing a date.
*
* @param firstDate The start date. Used as a basis for interpreting relative end dates such as
* 1934/35.
* @param endDate The string based representation of a date (number only).
* @param separator The separator used to split date parts. This may indicate the certainty of the
* trailing date as distinct from the entire date, as in 1935 or possibly 36.
* @param date The <tt>HistoricalDate</tt> object to be updated.
*/
private void setEndDate(String firstDate, String endDate, String separator, HistoricalDate date) {
if (endDate == null) {
date.setEndDate(date.getStartDate());
return;
}
// for dates like 1325/26, adjust the second to be a full four-year date
if (firstDate.length() > endDate.length()) {
int offset = firstDate.length() - endDate.length();
endDate = firstDate.substring(0, offset) + endDate;
}
date.setEndDate(date.getStartDate());
if (separator != null && (separator.indexOf("possibly") > 0)) {
date.setEndCertainty(Certainty.POSSIBLE);
}
}
/**
* @param desc
* @return
*/
public String extractDate(String desc) {
String result = desc;
Matcher mat = datePattern.matcher(desc);
if (mat.find() && (mat.start() == 0)) {
HistoricalDate date = new HistoricalDate(mat.group(1));
em.persist(date);
ms.setDate(date);
result = desc.substring(mat.end());
if (date.getText().matches(UNKNOWN_DATE_RE)) {
return result;
}
String prefix = StringUtils.trimToNull(mat.group(2));
String firstDate = StringUtils.trimToNull(mat.group(3));
String separator = StringUtils.trimToNull(mat.group(4));
String lastDate = StringUtils.trimToNull(mat.group(5));
String suffix = StringUtils.trimToNull(mat.group(6));
if (suffix != null) {
if (suffix.matches("c\\.?")) {
date.setPrecision(Precision.CENTURY);
} else {
// Doesn't seem to happen
}
}
if (prefix != null) {
if (prefix.equalsIgnoreCase("ca.")) {
// mark date as approximate
date.setCertainty(Certainty.APPROXIMATE);
} else if (prefix.equalsIgnoreCase("possibly")) {
// mark date as uncertain
date.setCertainty(Certainty.POSSIBLE);
} else {
// doesen't occur
}
}
setStartDate(firstDate, date);
setEndDate(firstDate, lastDate, separator, date);
LOGGER.debug(" Date: " + date.getText());
} else {
// System.out.println(desc);
}
return result;
}
