/**
* Retrieves the last modified date of a document from a connector instance.
*
* @param metadata the Document metadata
* @return a long integer specifying the time the document was last modified, in milliseconds
* since midnight, January 1, 1970 GMT, or -1L if the time is not known
*/
@VisibleForTesting
static long handleGetLastModified(Document metadata) {
if (metadata == null) {
return -1L;
}
try {
// TODO: Value and DateValue Calendar methods are too weak to try to get
// last modified from non-DateValues.
ValueImpl value =
(ValueImpl) Value.getSingleValue(metadata, SpiConstants.PROPNAME_LASTMODIFIED);
if (value == null) {
LOGGER.log(
Level.FINEST, "Document does not contain {0}", SpiConstants.PROPNAME_LASTMODIFIED);
} else if (value instanceof DateValue) {
// DateValues don't give direct access to their Calendar object, but
// I can get the Calendar back out by parsing the stringized version.
// This method also applies the FeedTimeZone, if needed.
// TODO: Add a DateValue.getTimeMillis() or getCalendar() method to
// directly access the wrapped value.
String lastModified = ((DateValue) value).toIso8601();
LOGGER.log(Level.FINEST, "Document last modified {0}", lastModified);
return Value.iso8601ToCalendar(lastModified).getTimeInMillis();
}
} catch (RepositoryException e) {
LOGGER.log(Level.WARNING, "Failed to retrieve last-modified date", e);
} catch (ParseException e) {
LOGGER.log(Level.WARNING, "Failed to parse last-modified date", e);
}
return -1L;
}
