Java tutorial
/* * ARX: Powerful Data Anonymization * Copyright 2012 - 2018 Fabian Prasser and contributors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.deidentifier.arx.gui.view.impl.menu; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import org.deidentifier.arx.gui.Controller; import org.deidentifier.arx.gui.resources.Charsets; import org.deidentifier.arx.gui.resources.Resources; import org.deidentifier.arx.gui.view.SWTUtil; import org.deidentifier.arx.gui.view.def.IDialog; import org.deidentifier.arx.io.CSVDataInput; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.ShellAdapter; import org.eclipse.swt.events.ShellEvent; import org.eclipse.swt.events.ShellListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; /** * */ public class DialogOpenHierarchy extends TitleAreaDialog implements IDialog { /** Constant */ private static final int LINES = 5; /** View */ private Table table; /** Model */ private int selectionSeparator; /** Model */ private int selectionCharset; /** Model */ private final char[] separators = { ';', ',', '|', '\t' }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ /** Model */ private final String[] labels = { ";", ",", "|", "Tab" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ /** Model */ private final String[] charsets = Charsets.getNamesOfAvailableCharsets(); /** Model */ private final String file; /** Model */ private final boolean data; /** * * * @param parent * @param controller * @param file * @param data */ public DialogOpenHierarchy(final Shell parent, final Controller controller, final String file, boolean data) { super(parent); this.file = file; this.data = data; } @Override public void create() { super.create(); setTitle(Resources.getMessage("SeparatorDialog.4")); //$NON-NLS-1$ setMessage(Resources.getMessage("SeparatorDialog.5"), IMessageProvider.INFORMATION); //$NON-NLS-1$ super.getShell().setSize(500, 350); super.getShell().layout(); SWTUtil.center(super.getShell(), super.getParentShell()); } /** * Returns the selected charset */ public Charset getCharset() { return Charsets.getCharsetForName(charsets[selectionCharset]); } /** * Returns the selected separator * * @return */ public char getSeparator() { return separators[selectionSeparator]; } /** * Detects the most frequent separator in the first few lines. * * @param file * @throws IOException */ private void detect(final String file) throws IOException { // Open file final Charset charset = Charsets.getCharsetForName(charsets[selectionCharset]); final BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(file), charset)); // Count chars int count = 0; String line = r.readLine(); final Map<Integer, Integer> map = new HashMap<Integer, Integer>(); while ((count < LINES) && (line != null)) { final char[] a = line.toCharArray(); for (final char c : a) { for (int i = 0; i < separators.length; i++) { if (c == separators[i]) { if (!map.containsKey(i)) { map.put(i, 0); } map.put(i, map.get(i) + 1); } } } line = r.readLine(); count++; } // Close r.close(); // Choose max if (map.isEmpty()) { return; } int max = Integer.MIN_VALUE; for (final int key : map.keySet()) { if (map.get(key) > max) { max = map.get(key); selectionSeparator = key; } } } /** * Returns the index of the default charset * @return */ private int getIndexOfDefaultCharset() { int index = 0; for (String charset : charsets) { if (charset.equals(Charsets.getNameOfDefaultCharset())) { return index; } index++; } return index; } /** * Reds the first few files with chosen separator. * * @param file * @throws IOException */ private void read(final String file) throws IOException { // Charset final Charset charset = Charsets.getCharsetForName(charsets[selectionCharset]); // Read the first few lines final CSVDataInput in = new CSVDataInput(file, charset, separators[selectionSeparator]); final Iterator<String[]> it = in.iterator(); final List<String[]> data = new ArrayList<String[]>(); int count = 0; while (it.hasNext() && (count < LINES)) { data.add(it.next()); count++; } in.close(); // In case of hierarchy, add header if (!this.data && data.size() > 0) { // Duplicate last entry data.add(data.get(data.size() - 1)); // Shift all entries for (int i = data.size() - 2; i >= 0; i--) { data.set(i + 1, data.get(i)); } // Add header int length = data.get(0).length; String[] header = new String[length]; for (int i = 0; i < length; i++) { header[i] = Resources.getMessage("SeparatorDialog.6") + (i + 1); //$NON-NLS-1$ } data.set(0, header); } // Add to table table.setRedraw(false); table.removeAll(); for (final TableColumn c : table.getColumns()) { c.dispose(); } if (data.size() == 0) { return; } for (final String s : data.get(0)) { final TableColumn c = new TableColumn(table, SWT.NONE); c.setText(s); c.pack(); } for (int i = 1; i < data.size(); i++) { final TableItem item = new TableItem(table, SWT.NONE); for (int j = 0; j < data.get(i).length; j++) { item.setText(j, data.get(i)[j]); } } table.setRedraw(true); table.redraw(); } @Override protected void configureShell(Shell newShell) { super.configureShell(newShell); newShell.setImages(Resources.getIconSet(newShell.getDisplay())); } @Override protected void createButtonsForButtonBar(final Composite parent) { // Create OK Button parent.setLayoutData(SWTUtil.createFillGridData()); final Button ok = createButton(parent, Window.OK, Resources.getMessage("SeparatorDialog.7"), true); //$NON-NLS-1$ ok.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { setReturnCode(Window.OK); close(); } }); // Create cancel Button parent.setLayoutData(SWTUtil.createFillGridData()); final Button cancel = createButton(parent, Window.CANCEL, Resources.getMessage("SeparatorDialog.8"), false); //$NON-NLS-1$ cancel.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { setReturnCode(Window.CANCEL); close(); } }); } @Override protected Control createDialogArea(final Composite parent) { parent.setLayout(new GridLayout()); final GridLayout l = new GridLayout(); l.numColumns = 2; parent.setLayout(l); // Build components table = SWTUtil.createTable(parent, SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER); GridData d = SWTUtil.createFillGridData(); d.horizontalSpan = 2; d.grabExcessHorizontalSpace = true; d.grabExcessVerticalSpace = true; table.setLayoutData(d); table.setHeaderVisible(true); table.setLinesVisible(true); try { this.selectionCharset = getIndexOfDefaultCharset(); detect(file); read(file); } catch (final Exception e) { if (e instanceof RuntimeException) { throw (RuntimeException) e; } else { throw new RuntimeException(e); } } final Combo combo = new Combo(parent, SWT.NONE); d = SWTUtil.createFillHorizontallyGridData(); d.horizontalSpan = 2; combo.setLayoutData(d); for (final String s : labels) { combo.add(s); } combo.select(selectionSeparator); combo.pack(); combo.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent arg0) { try { if (combo.getSelectionIndex() == -1) { return; } selectionSeparator = combo.getSelectionIndex(); read(file); } catch (final Exception e) { if (e instanceof RuntimeException) { throw (RuntimeException) e; } else { throw new RuntimeException(e); } } } }); final Combo combo2 = new Combo(parent, SWT.NONE); d = SWTUtil.createFillHorizontallyGridData(); d.horizontalSpan = 2; combo2.setLayoutData(d); for (final String s : charsets) { combo2.add(s); } combo2.select(getIndexOfDefaultCharset()); combo2.pack(); combo2.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent arg0) { try { if (combo2.getSelectionIndex() == -1) { return; } selectionCharset = combo2.getSelectionIndex(); read(file); } catch (final Exception e) { if (e instanceof RuntimeException) { throw (RuntimeException) e; } else { throw new RuntimeException(e); } } } }); return parent; } @Override protected ShellListener getShellListener() { return new ShellAdapter() { @Override public void shellClosed(final ShellEvent event) { event.doit = false; } }; } @Override protected boolean isResizable() { return false; } }