private void initRead() throws IOException {
if (input == null) {
try {
InputStream in = FileUtils.newInputStream(fileName);
in = new BufferedInputStream(in, Constants.IO_BUFFER_SIZE);
input = new InputStreamReader(in, characterSet);
} catch (IOException e) {
close();
throw e;
}
}
if (!input.markSupported()) {
input = new BufferedReader(input);
}
input.mark(1);
int bom = input.read();
if (bom != 0xfeff) {
// Microsoft Excel compatibility
// ignore pseudo-BOM
input.reset();
}
inputBuffer = new char[Constants.IO_BUFFER_SIZE * 2];
if (columnNames == null) {
readHeader();
}
}
