Method open

src/org/opensourcephysics/tools/DataTool.java:688–743

Opens an xml or data file specified by name. @param fileName the file name

(File file)

	 * @param fileName the file name
	 */
	public void open(File file) {
		// @return the file name, if successfully opened (datasets loaded)
		// BH 2020.02.13 return was string;
		OSPLog.fine("opening " + file); //$NON-NLS-1$
		Resource res = new Resource(file);
		Reader in = res.openReader();
		String firstLine = readFirstLine(in);
		// if xml, read the file into an XML control and add tab
		if (firstLine.startsWith("<?xml")) { //$NON-NLS-1$
			XMLControlElement control = new XMLControlElement(file);
			addTabs(control, new Consumer<ArrayList<DataToolTab>>() {

				@Override
				public void accept(ArrayList<DataToolTab> tabs) {
					if (tabs.isEmpty()) {
						OSPLog.finest("no data found"); //$NON-NLS-1$
					} else {
						for (DataToolTab tab : tabs) {
							refreshDataBuilder();
							if (tabs.size() == 1) {
								tab.fileName = file.toString();
							}
							tab.tabChanged(false);
						}
						try {
							in.close();
						} catch (IOException e) {
							// e.printStackTrace();
						}
					}
				}

			});
			return;
		}
		if (res.getString() != null) {
			// if not xml, attempt to import data and add tab(s)
			setMultipleTabPolicy(res.getString());
			Data[] data = parseData(res.getString(), file.toString());
			if (data != null) {
				DataToolTab first = null;
				for (int i = 0; i < data.length; i++) {
					DataToolTab tab = createTab(data[i]);
					first = first == null? tab: first;
					addTab(tab);
					if (data.length == 1)
						tab.fileName = file.getAbsolutePath();
					tab.tabChanged(false);
				}
				setSelectedTab(first);
				refreshDataBuilder();
				return;
			}
		}
		OSPLog.finest("no data found"); //$NON-NLS-1$
	}
	
	/**