/**
* Evaluates the page
*
* <p>This checks whether the current settings on the page make any sense. If everything is fine,
* the settings are being put into the appropriate data container {@link ImportWizardModel} and
* the current page is marked as complete by invoking {@link #setPageComplete(boolean)}. Otherwise
* an error message is set, which will make sure the user is informed about the reason for the
* error.
*/
private void evaluatePage() {
setPageComplete(false);
setErrorMessage(null);
tablePreview.setVisible(false);
if (comboLocation.getText().equals("")) { // $NON-NLS-1$
return;
}
try {
if (!customLinebreak) {
detectLinebreak();
comboLinebreak.select(selectedLinebreak);
}
if (!customDelimiter) {
detectDelimiter();
comboDelimiter.select(selectedDelimiter);
}
readPreview();
} catch (IOException | IllegalArgumentException e) {
setErrorMessage(e.getMessage());
return;
} catch (TextParsingException e) {
setErrorMessage(Resources.getMessage("ImportWizardPageCSV.16")); // $NON-NLS-1$
return;
} catch (RuntimeException e) {
if (e.getCause() != null) {
setErrorMessage(e.getCause().getMessage());
} else {
setErrorMessage(e.getMessage());
}
return;
}
/* Put data into container */
ImportWizardModel data = wizardImport.getData();
data.setWizardColumns(wizardColumns);
data.setPreviewData(previewData);
data.setFirstRowContainsHeader(btnContainsHeader.getSelection());
data.setFileLocation(comboLocation.getText());
data.setCsvDelimiter(delimiters[selectedDelimiter]);
data.setCsvQuote(quotes[selectedQuote]);
data.setCsvEscape(escapes[selectedEscape]);
data.setCharset(
Charsets.getCharsetForName(Charsets.getNamesOfAvailableCharsets()[selectedCharset]));
data.setCsvLinebreak(
CSVSyntax.getLinebreakForLabel(CSVSyntax.getAvailableLinebreaks()[selectedLinebreak]));
/* Mark page as completed */
setPageComplete(true);
}
/**
* Reads in preview data
*
* <p>This goes through up to {@link ImportWizardModel#PREVIEW_MAX_LINES} lines within the
* appropriate file and reads them in. It uses {@link ImportAdapter} in combination with {@link
* ImportConfigurationCSV} to actually read in the data.
*
* @throws IOException Signals that an I/O exception has occurred.
*/
private void readPreview() throws IOException {
/* Reset preview data */
previewData.clear();
/* Parameters from the user interface */
final String location = comboLocation.getText();
final char delimiter = delimiters[selectedDelimiter];
final char[] linebreak =
CSVSyntax.getLinebreakForLabel(CSVSyntax.getAvailableLinebreaks()[selectedLinebreak]);
final char quote = quotes[selectedQuote];
final char escape = escapes[selectedEscape];
final boolean containsHeader = btnContainsHeader.getSelection();
final Charset charset =
Charsets.getCharsetForName(Charsets.getNamesOfAvailableCharsets()[selectedCharset]);
/* Variables needed for processing */
final CSVDataInput in =
new CSVDataInput(location, charset, delimiter, quote, escape, linebreak);
final Iterator<String[]> it = in.iterator();
final String[] firstLine;
wizardColumns = new ArrayList<ImportWizardModelColumn>();
ImportConfigurationCSV config =
new ImportConfigurationCSV(
location, charset, delimiter, quote, escape, linebreak, containsHeader);
/* Check whether there is at least one line in file and retrieve it */
if (it.hasNext()) {
firstLine = it.next();
} else {
in.close();
throw new IOException(Resources.getMessage("ImportWizardPageCSV.17")); // $NON-NLS-1$
}
/* Iterate over columns and add it to {@link #allColumns} */
for (int i = 0; i < firstLine.length; i++) {
ImportColumn column = new ImportColumnCSV(i, DataType.STRING);
ImportWizardModelColumn wizardColumn = new ImportWizardModelColumn(column);
wizardColumns.add(wizardColumn);
config.addColumn(column);
}
/* Create adapter to import data with given configuration */
ImportAdapter importAdapter = ImportAdapter.create(config);
/* Get up to {ImportData#previewDataMaxLines} lines for previewing */
int count = 0;
while (importAdapter.hasNext() && (count <= ImportWizardModel.PREVIEW_MAX_LINES)) {
previewData.add(importAdapter.next());
count++;
}
in.close();
/* Remove first entry as it always contains name of columns */
previewData.remove(0);
/* Check whether there is actual any data */
if (previewData.size() == 0) {
throw new IOException(Resources.getMessage("ImportWizardPageCSV.18")); // $NON-NLS-1$
}
/*
* Show preview in appropriate table
*/
/* Disable redrawing once redesign is finished */
tablePreview.setRedraw(false);
/* Remove all of the old columns */
while (tablePreview.getColumnCount() > 0) {
tablePreview.getColumns()[0].dispose();
}
/* Add new columns */
for (ImportWizardModelColumn column : wizardColumns) {
TableViewerColumn tableViewerColumn = new TableViewerColumn(tableViewerPreview, SWT.NONE);
tableViewerColumn.setLabelProvider(
new CSVColumnLabelProvider(((ImportColumnCSV) column.getColumn()).getIndex()));
TableColumn tableColumn = tableViewerColumn.getColumn();
tableColumn.setWidth(100);
if (btnContainsHeader.getSelection()) {
tableColumn.setText(column.getColumn().getAliasName());
tableColumn.setToolTipText(
Resources.getMessage("ImportWizardPageCSV.19")
+ ((ImportColumnCSV) column.getColumn()).getIndex()); // $NON-NLS-1$
}
ColumnViewerToolTipSupport.enableFor(tableViewerPreview, ToolTip.NO_RECREATE);
}
/* Setup preview table */
tableViewerPreview.setInput(previewData);
tablePreview.setHeaderVisible(btnContainsHeader.getSelection());
tablePreview.setVisible(true);
tablePreview.layout();
tablePreview.setRedraw(true);
}
/**
* Creates the design of this page
*
* <p>This adds all the controls to the page along with their listeners.
*
* @param parent the parent
* @note {@link #tablePreview} is not visible until a file is loaded.
*/
public void createControl(Composite parent) {
Composite container = new Composite(parent, SWT.NULL);
setControl(container);
container.setLayout(new GridLayout(3, false));
/* Location label */
lblLocation = new Label(container, SWT.NONE);
lblLocation.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
lblLocation.setText(Resources.getMessage("ImportWizardPageCSV.7")); // $NON-NLS-1$
/* Combo box for selection of file */
comboLocation = new Combo(container, SWT.READ_ONLY);
comboLocation.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
comboLocation.addSelectionListener(
new SelectionAdapter() {
/** Resets {@link customSeparator} and evaluates page */
@Override
public void widgetSelected(SelectionEvent arg0) {
/* Make widgets visible */
lblDelimiter.setVisible(true);
comboDelimiter.setVisible(true);
lblQuote.setVisible(true);
comboQuote.setVisible(true);
lblLinebreak.setVisible(true);
comboLinebreak.setVisible(true);
lblEscape.setVisible(true);
lblCharset.setVisible(true);
comboCharset.setVisible(true);
comboEscape.setVisible(true);
btnContainsHeader.setVisible(true);
customDelimiter = false;
customLinebreak = false;
evaluatePage();
}
});
/* Button to open file selection dialog */
btnChoose = new Button(container, SWT.NONE);
btnChoose.setText(Resources.getMessage("ImportWizardPageCSV.8")); // $NON-NLS-1$
btnChoose.addSelectionListener(
new SelectionAdapter() {
/**
* Opens a file selection dialog for CSV files
*
* <p>If a valid CSV file was selected, it is added to {@link #comboLocation} when it
* wasn't already there. It is then preselected within {@link #comboLocation} and the page
* is evaluated {@see #evaluatePage}.
*/
@Override
public void widgetSelected(SelectionEvent arg0) {
/* Open file dialog */
final String path =
wizardImport
.getController()
.actionShowOpenFileDialog(getShell(), "*.csv"); // $NON-NLS-1$
if (path == null) {
return;
}
/* Check whether path was already added */
if (comboLocation.indexOf(path) == -1) {
comboLocation.add(path, 0);
}
/* Select path and notify comboLocation about change */
comboLocation.select(comboLocation.indexOf(path));
comboLocation.notifyListeners(SWT.Selection, null);
}
});
/* Delimiter label */
lblCharset = new Label(container, SWT.NONE);
lblCharset.setVisible(false);
lblCharset.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
lblCharset.setText(Resources.getMessage("ImportWizardPageCSV.20")); // $NON-NLS-1$
/* Delimiter combobox */
comboCharset = new Combo(container, SWT.READ_ONLY);
comboCharset.setVisible(false);
/* Add labels */
int index = 0;
for (final String s : Charsets.getNamesOfAvailableCharsets()) {
comboCharset.add(s);
if (s.equals(Charsets.getNameOfDefaultCharset())) {
selectedCharset = index;
}
index++;
}
comboCharset.select(selectedCharset);
comboCharset.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
comboCharset.addSelectionListener(
new SelectionAdapter() {
/** Set selection index and customDelimiter and (re-)evaluates page */
@Override
public void widgetSelected(final SelectionEvent arg0) {
selectedCharset = comboCharset.getSelectionIndex();
evaluatePage();
}
});
/* Place holder */
new Label(container, SWT.NONE);
/* Delimiter label */
lblDelimiter = new Label(container, SWT.NONE);
lblDelimiter.setVisible(false);
lblDelimiter.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
lblDelimiter.setText(Resources.getMessage("ImportWizardPageCSV.10")); // $NON-NLS-1$
/* Delimiter combobox */
comboDelimiter = new Combo(container, SWT.READ_ONLY);
comboDelimiter.setVisible(false);
/* Add labels */
for (final String s : labels) {
comboDelimiter.add(s);
}
comboDelimiter.select(selectedDelimiter);
comboDelimiter.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
comboDelimiter.addSelectionListener(
new SelectionAdapter() {
/** Set selection index and customDelimiter and (re-)evaluates page */
@Override
public void widgetSelected(final SelectionEvent arg0) {
selectedDelimiter = comboDelimiter.getSelectionIndex();
customDelimiter = true;
evaluatePage();
}
});
/* Place holder */
new Label(container, SWT.NONE);
/* Quote label */
lblQuote = new Label(container, SWT.NONE);
lblQuote.setVisible(false);
lblQuote.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
lblQuote.setText(Resources.getMessage("ImportWizardPageCSV.11")); // $NON-NLS-1$
/* Quote combobox */
comboQuote = new Combo(container, SWT.READ_ONLY);
comboQuote.setVisible(false);
/* Add labels */
for (final char c : quotes) {
comboQuote.add(String.valueOf(c));
}
comboQuote.select(selectedQuote);
comboQuote.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
comboQuote.addSelectionListener(
new SelectionAdapter() {
/** Set selection index and custom quote and (re-)evaluates page */
@Override
public void widgetSelected(final SelectionEvent arg0) {
selectedQuote = comboQuote.getSelectionIndex();
evaluatePage();
}
});
/* Place holder */
new Label(container, SWT.NONE);
/* Escape label */
lblEscape = new Label(container, SWT.NONE);
lblEscape.setVisible(false);
lblEscape.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
lblEscape.setText(Resources.getMessage("ImportWizardPageCSV.12")); // $NON-NLS-1$
/* Escape combobox */
comboEscape = new Combo(container, SWT.READ_ONLY);
comboEscape.setVisible(false);
/* Add labels */
for (final char c : escapes) {
comboEscape.add(String.valueOf(c));
}
comboEscape.select(selectedEscape);
comboEscape.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
comboEscape.addSelectionListener(
new SelectionAdapter() {
/** Set selection index and custom escape and (re-)evaluates page */
@Override
public void widgetSelected(final SelectionEvent arg0) {
selectedEscape = comboEscape.getSelectionIndex();
evaluatePage();
}
});
/* Place holder */
new Label(container, SWT.NONE);
/* Line break label */
lblLinebreak = new Label(container, SWT.NONE);
lblLinebreak.setVisible(false);
lblLinebreak.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
lblLinebreak.setText(Resources.getMessage("ImportWizardPageCSV.13")); // $NON-NLS-1$
/* Line break combobox */
comboLinebreak = new Combo(container, SWT.READ_ONLY);
comboLinebreak.setVisible(false);
/* Add labels */
for (final String c : CSVSyntax.getAvailableLinebreaks()) {
comboLinebreak.add(String.valueOf(c));
}
comboLinebreak.select(selectedLinebreak);
comboLinebreak.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
comboLinebreak.addSelectionListener(
new SelectionAdapter() {
/** Set selection index and custom line break and (re-)evaluates page */
@Override
public void widgetSelected(final SelectionEvent arg0) {
selectedLinebreak = comboLinebreak.getSelectionIndex();
customLinebreak = true;
evaluatePage();
}
});
/* Place holders */
new Label(container, SWT.NONE);
new Label(container, SWT.NONE);
/* Contains header button */
btnContainsHeader = new Button(container, SWT.CHECK);
btnContainsHeader.setVisible(false);
btnContainsHeader.setText(Resources.getMessage("ImportWizardPageCSV.14")); // $NON-NLS-1$
btnContainsHeader.setSelection(true);
btnContainsHeader.addSelectionListener(
new SelectionAdapter() {
/** (Re-)Evaluate page */
@Override
public void widgetSelected(SelectionEvent arg0) {
evaluatePage();
}
});
/* Place holder */
new Label(container, SWT.NONE);
/* Place holders */
new Label(container, SWT.NONE);
new Label(container, SWT.NONE);
new Label(container, SWT.NONE);
/* Preview table viewer */
tableViewerPreview = SWTUtil.createTableViewer(container, SWT.BORDER | SWT.FULL_SELECTION);
tableViewerPreview.setContentProvider(new ArrayContentProvider());
/* Actual table for {@link #tableViewerPreview} */
tablePreview = tableViewerPreview.getTable();
GridData gd_tablePreview = new GridData(SWT.FILL, SWT.FILL, true, true, 3, 1);
gd_tablePreview.heightHint = 150;
tablePreview.setLayoutData(gd_tablePreview);
tablePreview.setLinesVisible(true);
tablePreview.setVisible(false);
/* Set page to incomplete by default */
setPageComplete(false);
}
