/**
* Gets the next row from the current data access object data source. <i>Side effect:</i> Updates
* the current record number
*/
@Override
public Row readRow() throws DataAccessObjectException {
if (!isOpen) {
open();
}
List<String> record;
synchronized (lock) {
try {
record = csvReader.nextRecord();
} catch (IOException e) {
throw new DataAccessObjectException(e);
}
}
if (!DAORowUtil.isValidRow(record)) {
return null;
}
if (record.size() > headerRow.size()) {
String errMsg =
Messages.getFormattedString(
"CSVFileDAO.errorRowTooLarge",
new String[] {
String.valueOf(currentRowNumber),
String.valueOf(record.size()),
String.valueOf(headerRow.size())
});
throw new DataAccessRowException(errMsg);
}
Row row = new Row(record.size());
for (int i = 0; i < headerRow.size(); i++) {
String value = record.get(i);
if (value == null) {
value = "";
}
row.put(headerRow.get(i), value);
}
currentRowNumber++;
return row;
}
private void readHeaderRow() throws DataAccessObjectInitializationException {
try {
synchronized (lock) {
headerRow = csvReader.nextRecord();
}
if (headerRow == null) {
LOGGER.error(Messages.getString("CSVFileDAO.errorHeaderRow"));
throw new DataAccessObjectInitializationException(
Messages.getString("CSVFileDAO.errorHeaderRow"));
}
} catch (IOException e) {
String errMsg = Messages.getString("CSVFileDAO.errorHeaderRow");
LOGGER.error(errMsg, e);
throw new DataAccessObjectInitializationException(errMsg, e);
} finally {
// if there's a problem getting header row, the stream needs to be closed
if (headerRow == null) {
IOUtils.closeQuietly(input);
}
}
}