/**
* Reads the data from a given reader.
*
* @param aProject the project to read the settings to;
* @param aReader the reader to read the data from, cannot be <code>null</code>.
* @throws IOException in case of I/O problems.
*/
@SuppressWarnings("boxing")
public static void read(final StubDataSet aDataSet, final Reader aReader) throws IOException {
int size = -1;
Integer rate = null, channels = null, enabledChannels = null;
long triggerPos = -1L;
long absLen = -1L;
// assume 'new' file format is in use, don't support uncompressed ones...
boolean compressed = true;
final BufferedReader br = new BufferedReader(aReader);
final List<String[]> dataValues = new ArrayList<String[]>();
String line;
while ((line = br.readLine()) != null) {
// Determine whether the line is an instruction, or data...
final Matcher instructionMatcher = OLS_INSTRUCTION_PATTERN.matcher(line);
final Matcher dataMatcher = OLS_DATA_PATTERN.matcher(line);
if (dataMatcher.matches()) {
final String[] dataPair = new String[] {dataMatcher.group(1), dataMatcher.group(2)};
dataValues.add(dataPair);
} else if (instructionMatcher.matches()) {
// Ok; found an instruction...
final String instrKey = instructionMatcher.group(1);
final String instrValue = instructionMatcher.group(2);
if ("Size".equals(instrKey)) {
size = safeParseInt(instrValue);
} else if ("Rate".equals(instrKey)) {
rate = safeParseInt(instrValue);
} else if ("Channels".equals(instrKey)) {
channels = safeParseInt(instrValue);
} else if ("TriggerPosition".equals(instrKey)) {
triggerPos = Long.parseLong(instrValue);
} else if ("EnabledChannels".equals(instrKey)) {
enabledChannels = safeParseInt(instrValue);
} else if ("CursorEnabled".equals(instrKey)) {
aDataSet.setCursorsEnabled(Boolean.parseBoolean(instrValue));
} else if ("Compressed".equals(instrKey)) {
compressed = Boolean.parseBoolean(instrValue);
} else if ("AbsoluteLength".equals(instrKey)) {
absLen = Long.parseLong(instrValue);
} else if ("CursorA".equals(instrKey)) {
final long value = safeParseLong(instrValue);
if (value > Long.MIN_VALUE) {
aDataSet.getCursor(0).setTimestamp(value);
}
} else if ("CursorB".equals(instrKey)) {
final long value = safeParseLong(instrValue);
if (value > Long.MIN_VALUE) {
aDataSet.getCursor(1).setTimestamp(value);
}
} else if (instrKey.startsWith("Cursor")) {
final int idx = safeParseInt(instrKey.substring(6));
final long pos = Long.parseLong(instrValue);
if (pos > Long.MIN_VALUE) {
aDataSet.getCursor(idx).setTimestamp(pos);
}
}
}
}
// Perform some sanity checks, make it not possible to import invalid
// data...
if (dataValues.isEmpty()) {
throw new IOException("Data file does not contain any sample data!");
}
if (!compressed) {
throw new IOException(
"Uncompressed data file found! Please send this file to the OLS developers!");
}
// In case the size is not provided (as of 0.9.4 no longer mandatory),
// take the length of the data values as size indicator...
if (size < 0) {
size = dataValues.size();
}
if (size != dataValues.size()) {
throw new IOException("Data file is corrupt?! Data size does not match sample count!");
}
if (rate == null) {
throw new IOException("Data file is corrupt?! Sample rate is not provided!");
}
if ((channels == null) || (channels <= 0) || (channels > 32)) {
throw new IOException("Data file is corrupt?! Channel count is not provided!");
}
// Make sure the enabled channels are defined...
if (enabledChannels == null) {
enabledChannels = NumberUtils.getBitMask(channels);
}
int[] values = new int[size];
long[] timestamps = new long[size];
try {
for (int i = 0; i < size; i++) {
final String[] dataPair = dataValues.get(i);
values[i] = (int) Long.parseLong(dataPair[0], 16);
timestamps[i] = Long.parseLong(dataPair[1], 10) & Long.MAX_VALUE;
}
} catch (final NumberFormatException exception) {
throw new IOException("Invalid data encountered.", exception);
}
// Allow the absolute length to be undefined, in which case the last
// time stamp is used (+ some margin to be able to see the last
// sample)...
long absoluteLength = Math.max(absLen, timestamps[size - 1]);
// Finally set the captured data, and notify all event listeners...
aDataSet.setCapturedData(
new CapturedData(
values, timestamps, triggerPos, rate, channels, enabledChannels, absoluteLength));
}
/** Helper class that is capable of reading & writing OLS data files. */
public final class OlsDataHelper {
// CONSTANTS
/** The regular expression used to parse an (OLS-datafile) instruction. */
private static final Pattern OLS_INSTRUCTION_PATTERN =
Pattern.compile("^;([^:]+):\\s+([^\r\n]+)$");
/** The regular expression used to parse an (OLS-datafile) data value. */
private static final Pattern OLS_DATA_PATTERN = Pattern.compile("^([0-9a-fA-F]+)@(\\d+)$");
// METHODS
/**
* Reads the data from a given reader.
*
* @param aProject the project to read the settings to;
* @param aReader the reader to read the data from, cannot be <code>null</code>.
* @throws IOException in case of I/O problems.
*/
@SuppressWarnings("boxing")
public static void read(final StubDataSet aDataSet, final Reader aReader) throws IOException {
int size = -1;
Integer rate = null, channels = null, enabledChannels = null;
long triggerPos = -1L;
long absLen = -1L;
// assume 'new' file format is in use, don't support uncompressed ones...
boolean compressed = true;
final BufferedReader br = new BufferedReader(aReader);
final List<String[]> dataValues = new ArrayList<String[]>();
String line;
while ((line = br.readLine()) != null) {
// Determine whether the line is an instruction, or data...
final Matcher instructionMatcher = OLS_INSTRUCTION_PATTERN.matcher(line);
final Matcher dataMatcher = OLS_DATA_PATTERN.matcher(line);
if (dataMatcher.matches()) {
final String[] dataPair = new String[] {dataMatcher.group(1), dataMatcher.group(2)};
dataValues.add(dataPair);
} else if (instructionMatcher.matches()) {
// Ok; found an instruction...
final String instrKey = instructionMatcher.group(1);
final String instrValue = instructionMatcher.group(2);
if ("Size".equals(instrKey)) {
size = safeParseInt(instrValue);
} else if ("Rate".equals(instrKey)) {
rate = safeParseInt(instrValue);
} else if ("Channels".equals(instrKey)) {
channels = safeParseInt(instrValue);
} else if ("TriggerPosition".equals(instrKey)) {
triggerPos = Long.parseLong(instrValue);
} else if ("EnabledChannels".equals(instrKey)) {
enabledChannels = safeParseInt(instrValue);
} else if ("CursorEnabled".equals(instrKey)) {
aDataSet.setCursorsEnabled(Boolean.parseBoolean(instrValue));
} else if ("Compressed".equals(instrKey)) {
compressed = Boolean.parseBoolean(instrValue);
} else if ("AbsoluteLength".equals(instrKey)) {
absLen = Long.parseLong(instrValue);
} else if ("CursorA".equals(instrKey)) {
final long value = safeParseLong(instrValue);
if (value > Long.MIN_VALUE) {
aDataSet.getCursor(0).setTimestamp(value);
}
} else if ("CursorB".equals(instrKey)) {
final long value = safeParseLong(instrValue);
if (value > Long.MIN_VALUE) {
aDataSet.getCursor(1).setTimestamp(value);
}
} else if (instrKey.startsWith("Cursor")) {
final int idx = safeParseInt(instrKey.substring(6));
final long pos = Long.parseLong(instrValue);
if (pos > Long.MIN_VALUE) {
aDataSet.getCursor(idx).setTimestamp(pos);
}
}
}
}
// Perform some sanity checks, make it not possible to import invalid
// data...
if (dataValues.isEmpty()) {
throw new IOException("Data file does not contain any sample data!");
}
if (!compressed) {
throw new IOException(
"Uncompressed data file found! Please send this file to the OLS developers!");
}
// In case the size is not provided (as of 0.9.4 no longer mandatory),
// take the length of the data values as size indicator...
if (size < 0) {
size = dataValues.size();
}
if (size != dataValues.size()) {
throw new IOException("Data file is corrupt?! Data size does not match sample count!");
}
if (rate == null) {
throw new IOException("Data file is corrupt?! Sample rate is not provided!");
}
if ((channels == null) || (channels <= 0) || (channels > 32)) {
throw new IOException("Data file is corrupt?! Channel count is not provided!");
}
// Make sure the enabled channels are defined...
if (enabledChannels == null) {
enabledChannels = NumberUtils.getBitMask(channels);
}
int[] values = new int[size];
long[] timestamps = new long[size];
try {
for (int i = 0; i < size; i++) {
final String[] dataPair = dataValues.get(i);
values[i] = (int) Long.parseLong(dataPair[0], 16);
timestamps[i] = Long.parseLong(dataPair[1], 10) & Long.MAX_VALUE;
}
} catch (final NumberFormatException exception) {
throw new IOException("Invalid data encountered.", exception);
}
// Allow the absolute length to be undefined, in which case the last
// time stamp is used (+ some margin to be able to see the last
// sample)...
long absoluteLength = Math.max(absLen, timestamps[size - 1]);
// Finally set the captured data, and notify all event listeners...
aDataSet.setCapturedData(
new CapturedData(
values, timestamps, triggerPos, rate, channels, enabledChannels, absoluteLength));
}
/**
* Writes the data to the given writer.
*
* @param aDataSet the project to write the settings for, cannot be <code>null</code> ;
* @param aWriter the writer to write the data to, cannot be <code>null</code>.
* @throws IOException in case of I/O problems.
*/
public static void write(final StubDataSet aDataSet, final Writer aWriter) throws IOException {
final BufferedWriter bw = new BufferedWriter(aWriter);
final AcquisitionResult capturedData = aDataSet.getCapturedData();
final Cursor[] cursors = aDataSet.getCursors();
final boolean cursorsEnabled = aDataSet.isCursorsEnabled();
try {
final int[] values = capturedData.getValues();
final long[] timestamps = capturedData.getTimestamps();
bw.write(";Size: ");
bw.write(Integer.toString(values.length));
bw.newLine();
bw.write(";Rate: ");
bw.write(Integer.toString(capturedData.getSampleRate()));
bw.newLine();
bw.write(";Channels: ");
bw.write(Integer.toString(capturedData.getChannels()));
bw.newLine();
bw.write(";EnabledChannels: ");
bw.write(Integer.toString(capturedData.getEnabledChannels()));
bw.newLine();
if (capturedData.hasTriggerData()) {
bw.write(";TriggerPosition: ");
bw.write(Long.toString(capturedData.getTriggerPosition()));
bw.newLine();
}
bw.write(";Compressed: ");
bw.write(Boolean.toString(true));
bw.newLine();
bw.write(";AbsoluteLength: ");
bw.write(Long.toString(capturedData.getAbsoluteLength()));
bw.newLine();
bw.write(";CursorEnabled: ");
bw.write(Boolean.toString(cursorsEnabled));
bw.newLine();
for (int i = 0; cursorsEnabled && (i < cursors.length); i++) {
if (cursors[i].isDefined()) {
bw.write(String.format(";Cursor%d: ", Integer.valueOf(i)));
bw.write(Long.toString(cursors[i].getTimestamp()));
bw.newLine();
}
}
for (int i = 0; i < values.length; i++) {
bw.write(formatSample(values[i], timestamps[i]));
bw.newLine();
}
} finally {
bw.flush();
}
}
/**
* Formats the given value and timestamp into a single sample string.
*
* @param aValue the sample value to format;
* @param aTimestamp the timestamp to format.
* @return the sample string, in the form of
* <value<sub>16</sub>>@<timestamp<sub>10</sub>>.
*/
@SuppressWarnings("boxing")
static String formatSample(final int aValue, final long aTimestamp) {
// values can become negative (full 32-bit is used!), while timestamps never
// can be negative (it is a relative timestamp!)...
return String.format("%08x@%d", aValue, (aTimestamp & Long.MAX_VALUE));
}
}