Method parseData

src/org/opensourcephysics/tools/DataTool.java:1172–1456

Parses character-delimited data from a string. This attempts to extract the following information from the string: 1. A title to be used for the tab name 2. One or more columns of double data values 3. Column names for the data columns @param dataString the data string @param fileName name of fi

(String dataString, String fileName)

	 * @return DatasetManager[] with parsed data, or null if none found
	 */
	public static DatasetManager[] parseData(String dataString, String fileName) {
		final String gnuPlotComment = "#"; //$NON-NLS-1$
		BufferedReader input = null;
		// if dataString is a file path then return null
		if (new File(dataString).exists())
			return null;
		// if datastring is XML, return null
		if (dataString.trim().startsWith("<?xml"))
			return null;
		// if datastring is XMLControl code, return null
		if (dataString.trim().startsWith("<object class="))
			return null;
		try {
			for (int i = 0; i < delimiters.length; i++) {
				input = new BufferedReader(new StringReader(dataString));
				String textLine = input.readLine();
				ArrayList<double[]> rows = new ArrayList<double[]>();
				int columns = Integer.MAX_VALUE;
				String[] columnNames = null;
				String title = null;
				ArrayList<String> titles = new ArrayList<String>();
				boolean isMulti = false;
				int lineCount = 0;
				int columnStride = -1;
				while (textLine != null) {
					// process each line of text
					if (textLine.startsWith("//")) { //$NON-NLS-1$
						// ignore comments (lines starting with "//")
						textLine = input.readLine();
						continue;
					}
					if (textLine.contains(gnuPlotComment)) {
						// trim gnuPlot comments
						textLine = textLine.trim(); // added by W. Christian
					}
					// look for gnuPlot-commented name and/or columnNames
					// or multitrack hint
					if (textLine.startsWith(gnuPlotComment)) {
						int k = textLine.indexOf("name:"); //$NON-NLS-1$
						if (k > -1) {
							title = textLine.substring(k + 5).trim();
						}
						k = textLine.indexOf("columnNames:"); //$NON-NLS-1$
						if (k > -1) {
							textLine = textLine.substring(k + 12).trim();
						}
						k = textLine.indexOf("multi:"); //$NON-NLS-1$
						if (k > -1) {
							textLine = textLine.substring(k + 6).trim();
							isMulti = true;
							if (textLine.length() == 0) {
								textLine = input.readLine();
								continue;
							}
						} else {
							textLine = input.readLine();
							continue;
						}