List of usage examples for java.io Reader mark
public void mark(int readAheadLimit) throws IOException
From source file:org.mule.util.ClassUtils.java
private static String classNameHelper(Reader encodedName) { // I did consider separating this data from the code, but I could not find a // solution that was as clear to read, or clearly motivated (these data are not // used elsewhere). try {//from ww w . j av a2s.c om encodedName.mark(1); switch (encodedName.read()) { case -1: return "null"; case 'Z': return "boolean"; case 'B': return "byte"; case 'C': return "char"; case 'D': return "double"; case 'F': return "float"; case 'I': return "int"; case 'J': return "long"; case 'S': return "short"; case '[': return classNameHelper(encodedName) + "[]"; case 'L': return shorten(new BufferedReader(encodedName).readLine()); default: encodedName.reset(); return shorten(new BufferedReader(encodedName).readLine()); } } catch (IOException e) { return "unknown type: " + e.getMessage(); } }
From source file:org.regenstrief.util.Util.java
/** * Retrieves a Reader that can be marked and marks it * // w w w.jav a2 s. co m * @param in the Reader * @return the markable Reader **/ public static final Reader getMarkableReader(Reader in) { in = in.markSupported() ? in : new BufferedReader(in); try { in.mark(MAX_MARK_BUFFER); } catch (final IOException e) { throw new RuntimeException(e); } return in; }
From source file:org.transitime.utils.csv.CsvBaseReader.java
/** * Parse the CSV file. Reads in the header info and then each line. Calls * the abstract handleRecord() method for each record. Adds each resulting * CSV object to the gtfsObjecgts array. */// w w w.j a v a 2s. co m private void parse() { CSVRecord record = null; try { IntervalTimer timer = new IntervalTimer(); logger.debug("Parsing CSV file {} ...", fileName); // Open the file for reading. Use UTF-8 format since that will work // for both regular ASCII format and UTF-8 extended format files // since UTF-8 was designed to be backwards compatible with ASCII. // This way will work for Chinese and other character sets. Use // InputStreamReader so can specify that using UTF-8 format. Use // BufferedReader so that can determine if first character is an // optional BOM (Byte Order Mark) character used to indicate that // file is in UTF-8 format. BufferedReader allows us to read in // first character and then discard if it is a BOM character or // reset the reader to back to the beginning if it is not. This // way the CSV parser will process the file starting with the first // true character. Reader in = new BufferedReader(new InputStreamReader(new FileInputStream(fileName), "UTF-8")); // Deal with the possible BOM character at the beginning of the file in.mark(1); int firstRead = in.read(); final int BOM_CHARACTER = 0xFEFF; if (firstRead != BOM_CHARACTER) in.reset(); // Get ready to parse the CSV file. // Allow lines to be comments if they start with "-" so that can // easily comment out problems and also test what happens when // certain data is missing. Using the '-' character so can // comment out line that starts with "--", which is what is // used for SQL. CSVFormat formatter = CSVFormat.DEFAULT.withHeader().withCommentMarker('-'); // Parse the file Iterable<CSVRecord> records = formatter.parse(in); logger.debug("Finished CSV parsing of file {}. Took {} msec.", fileName, timer.elapsedMsec()); int lineNumberWhenLogged = 0; timer = new IntervalTimer(); IntervalTimer loggingTimer = new IntervalTimer(); Iterator<CSVRecord> iterator = records.iterator(); while (iterator.hasNext()) { // Determine the record to process record = iterator.next(); // If blank line then skip it. This way avoid error messages since // expected data column won't exist if (record.size() == 0) continue; // Process the record using appropriate handler // and create the corresponding CSV object T gtfsObject; try { gtfsObject = handleRecord(record, supplemental); } catch (ParseException e) { logger.error("ParseException occurred for record {} " + "(comment lines not included when determing record #) for " + "filename {} . {}", record.getRecordNumber(), fileName, e.getMessage()); // Continue even though there was an error so that all errors // logged at once. continue; } catch (NumberFormatException e) { logger.error("NumberFormatException occurred for record {} " + "(comment lines not included when determing record #) " + "for filename {} . {}", record.getRecordNumber(), fileName, e.getMessage()); // Continue even though there was an error so that all errors // logged at once. continue; } // Add the newly created CSV object to the object list if (gtfsObject != null) gtfsObjects.add(gtfsObject); // Log info if it has been a while. Check only every 20,000 // lines to see if the 10 seconds has gone by. If so, then log // number of lines. By only looking at timer every 20,000 lines // not slowing things down by for every line doing system call // for to get current time. final int LINES_TO_PROCESS_BEFORE_CHECKING_IF_SHOULD_LOG = 20000; final long SECONDS_ELSAPSED_UNTIL_SHOULD_LOG = 5; if (record.getRecordNumber() >= lineNumberWhenLogged + LINES_TO_PROCESS_BEFORE_CHECKING_IF_SHOULD_LOG) { lineNumberWhenLogged = (int) record.getRecordNumber(); if (loggingTimer.elapsedMsec() > SECONDS_ELSAPSED_UNTIL_SHOULD_LOG * Time.MS_PER_SEC) { logger.info(" Processed {} lines. Took {} msec...", lineNumberWhenLogged, timer.elapsedMsec()); loggingTimer = new IntervalTimer(); } } } // End of while iterating over records // Close up the file reader in.close(); // Determine number of records for logging message long numberRecords = 0; if (record != null) numberRecords = record.getRecordNumber(); logger.info("Finished parsing {} records from file {} . Took {} msec.", numberRecords, fileName, timer.elapsedMsec()); } catch (FileNotFoundException e) { if (required) logger.error("Required CSV file {} not found.", fileName); else logger.info("CSV file {} not found but OK because this file " + "not required.", fileName); } catch (IOException e) { logger.error("IOException occurred when reading in filename {}.", fileName, e); } }