/**
* Translates the given CSV content into a List of objects.
*
* <p>Translation of each row into its representative object is handled by the {@link
* RowTranslator} provided during construction. This class only handles the generic iteration
* logic and global error handling.
*
* <p><strong>Warning:</strong> the given CSV content is read completely into memory while
* parsing. This method does not therefore support very large CSV files (i.e., 50MB+).
*
* @param csvReader a Reader providing the CSV content. This method will close the reader when
* done.
*/
public TabularParseResult<T> readObjects(final Reader csvReader) {
final ArrayList<TabularUploadError> errors = new ArrayList<>();
try {
final List<CSVRecord> records = CSVFormat.EXCEL.parse(csvReader).getRecords();
LOGGER.debug("The CSV file has {} rows.", records.size());
if (records.isEmpty()) {
errors.add(TabularUploadError.global(ValidationCodes.NO_VALUE, null, "no records"));
} else {
return readProcedures(records, errors);
}
} catch (final IOException ex) {
errors.add(
TabularUploadError.global(
ValidationCodes.INVALID_CONTENTS, null, "Could not parse the CSV content."));
} finally {
try {
csvReader.close();
} catch (final IOException ex) {
LOGGER.warn("Failed to close the CSV reader.", ex);
}
}
return new TabularParseResult<>(Collections.<T>emptyList(), errors);
}
/**
* Executa carregamento da matriz de adjacência por um arquivo CSV
*
* @param file Arquivo CSV
* @throws IOException Problema no momento da leitura do arquivo CSV
*/
public void loadCsv(File file) throws IOException {
Reader in = new FileReader(file);
Iterable<CSVRecord> records = CSVFormat.EXCEL.parse(in);
for (CSVRecord record : records) {
List<Integer> linha = new ArrayList<>();
Iterator<String> linhaCsv = record.iterator();
while (linhaCsv.hasNext()) {
try {
linha.add(Integer.parseInt(linhaCsv.next()));
} catch (NumberFormatException e) {
throw new RuntimeException("Não foi possivel converter arquivo!", e);
}
}
mapa.add(linha);
}
}
