Example usage for com.vaadin.ui Grid getSortOrder

Introduction

In this page you can find the example usage for com.vaadin.ui Grid getSortOrder.

Prototype

public List<GridSortOrder<T>> getSortOrder() 

Source Link

Document

Get the current sort order list.

Usage

From source file:de.symeda.sormas.ui.utils.GridExportStreamResource.java

License:Open Source License

public GridExportStreamResource(Grid<?> grid, String tempFilePrefix, String filename,
        String... ignoredPropertyIds) {
    super(new StreamSource() {
        @SuppressWarnings({ "unchecked", "rawtypes" })
        @Override/* w ww.  j  a  va 2s .  c o m*/
        public InputStream getStream() {
            List<String> ignoredPropertyIdsList = Arrays.asList(ignoredPropertyIds);
            List<Column> columns = new ArrayList<>(grid.getColumns());
            columns.removeIf(c -> c.isHidden());
            columns.removeIf(c -> ignoredPropertyIdsList.contains(c.getId()));

            try (ByteArrayOutputStream byteStream = new ByteArrayOutputStream()) {
                try (CSVWriter writer = CSVUtils.createCSVWriter(
                        new OutputStreamWriter(byteStream, StandardCharsets.UTF_8.name()),
                        FacadeProvider.getConfigFacade().getCsvSeparator())) {

                    List<String> headerRow = new ArrayList<>();
                    columns.forEach(c -> {
                        headerRow.add(c.getCaption());
                    });
                    writer.writeNext(headerRow.toArray(new String[headerRow.size()]));

                    String[] rowValues = new String[columns.size()];

                    int totalRowCount = grid.getDataProvider().size(new Query());
                    for (int i = 0; i < totalRowCount; i += 100) {
                        grid.getDataProvider().fetch(new Query(i, 100, grid.getSortOrder(), null, null))
                                .forEach(row -> {
                                    for (int c = 0; c < columns.size(); c++) {
                                        Column column = columns.get(c);
                                        Object value = column.getValueProvider().apply(row);
                                        String valueString;
                                        if (value != null) {
                                            if (value instanceof Date) {
                                                valueString = DateHelper.formatLocalDateTime((Date) value);
                                            } else if (value instanceof Boolean) {
                                                if ((Boolean) value == true) {
                                                    valueString = I18nProperties
                                                            .getEnumCaption(YesNoUnknown.YES);
                                                } else
                                                    valueString = I18nProperties
                                                            .getEnumCaption(YesNoUnknown.NO);
                                            } else {
                                                valueString = value.toString();
                                            }
                                        } else {
                                            valueString = "";
                                        }
                                        rowValues[c] = valueString;
                                    }
                                    writer.writeNext(rowValues);
                                });
                        writer.flush();
                    }
                }
                return new BufferedInputStream(new ByteArrayInputStream(byteStream.toByteArray()));
            } catch (IOException e) {
                // TODO This currently requires the user to click the "Export" button again or reload the page as the UI
                // is not automatically updated; this should be changed once Vaadin push is enabled (see #516)
                new Notification(I18nProperties.getString(Strings.headingExportFailed),
                        I18nProperties.getString(Strings.messageExportFailed), Type.ERROR_MESSAGE, false)
                                .show(Page.getCurrent());
                return null;
            }
        }
    }, filename);
    setMIMEType("text/csv");
    setCacheTime(0);
}

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