private void closeQuietly(ICsvMapReader mapReader) {
if (mapReader != null) {
try {
mapReader.close();
} catch (IOException e) {
LOGGER.error(e.getMessage(), e);
}
}
}
@SuppressWarnings("unchecked")
@Override
public List<T> parse(InputStream inputStream, Class<T> clazz) {
// Preconditions
SeedException.createNew(RendererErrorCode.INCORRECT_PARAM)
.put(PARAM, clazz)
.throwsIf(!DataRepresentation.class.equals(clazz));
SeedException.createNew(RendererErrorCode.INCORRECT_PARAM)
.put(PARAM, inputStream)
.throwsIfNull(inputStream);
ICsvMapReader mapReader = null;
List<T> dataRepresentations = new ArrayList<T>();
try {
mapReader =
new CsvMapReader(
new InputStreamReader(inputStream, template.getCharsetName()),
template.getPreferences());
// Read file header and use it to determine the number of column
String[] headers = mapReader.getHeader(true);
if (headers != null && headers.length > 0) {
final CellProcessor[] processors = new CellProcessor[headers.length];
for (int i = 0; i < processors.length; i++) {
processors[i] = new Optional();
}
// Read the input stream
Map<String, Object> beanMap;
while ((beanMap = mapReader.read(headers, processors)) != null) {
// Get a bean map and transform it in an data representation
DataRepresentation dataRepresentation = buildDataRepresentation(beanMap);
dataRepresentations.add((T) dataRepresentation);
}
}
} catch (IOException e) {
LOGGER.error(e.getMessage(), e);
} finally {
closeQuietly(mapReader);
}
return dataRepresentations;
}
public void executeMode() throws IOException, CoreEngineException {
// ***** Get the input file
String mergeCSVPath = config.getProperty(Constants.MERGE_CSV_FILE);
if ((mergeCSVPath == null) || (mergeCSVPath.isEmpty())) {
throw new CoreEngineException("No merge CSV file");
}
File dataFile = new File(mergeCSVPath);
if (dataFile.exists() == false) {
throw new CoreEngineException("Invalid merge CSV file - " + mergeCSVPath);
}
// ***** Get the output file
String modeCSVPath = config.getProperty(Constants.MODE_CSV_FILE);
if ((modeCSVPath == null) || (modeCSVPath.isEmpty())) {
throw new CoreEngineException("No mode CSV file path");
}
// ***** Calculate mode
ICsvMapReader csvReader = null;
ICsvMapWriter csvWriter = null;
try {
logger.log(
Level.INFO, "========== Calulating mode using data file - " + dataFile.getAbsolutePath());
// ***** Parse the data file
csvReader = new CsvMapReader(new FileReader(dataFile), CsvPreference.STANDARD_PREFERENCE);
String readHeaders[] = csvReader.getHeader(true);
CellProcessor csvReadProcessors[] = getReadCellProcessors();
// ***** Iterate over each record, process each record & write to CSV
Map<String, Object> record = null;
while ((record = csvReader.read(readHeaders, csvReadProcessors)) != null) {
populateRecordEntries(record);
}
logger.log(Level.INFO, recordEntryIndex.toString());
calculateBedroomModePerYear();
logger.log(Level.INFO, modeEntryList.toString());
// ***** Write records once the mode is calculated
csvWriter = new CsvMapWriter(new FileWriter(modeCSVPath), CsvPreference.STANDARD_PREFERENCE);
String writeHeaders[] = getHeaders();
csvWriter.writeHeader(writeHeaders);
CellProcessor[] csvWriteProcessors = getWriteCellProcessors();
for (int i = 0; i < modeEntryList.size(); i++) {
Map<String, Object> modeEntry = (Map<String, Object>) modeEntryList.get(i);
csvWriter.write(modeEntry, writeHeaders, csvWriteProcessors);
}
logger.log(
Level.INFO,
"========== Successfully caculated mode using data file - " + dataFile.getAbsolutePath());
} catch (Exception e) {
logger.log(
Level.SEVERE,
"========== Failed caculating mode using data file - " + dataFile.getAbsolutePath(),
e);
throw new CoreEngineException(e);
} finally {
if (csvReader != null) csvReader.close();
if (csvWriter != null) csvWriter.close();
}
}