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1   /**
2    * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
3    */
4   package net.sourceforge.pmd.cpd;
5   
6   import javax.swing.*;
7   import javax.swing.event.ListSelectionEvent;
8   import javax.swing.event.ListSelectionListener;
9   import javax.swing.event.TableModelListener;
10  import javax.swing.table.DefaultTableCellRenderer;
11  import javax.swing.table.JTableHeader;
12  import javax.swing.table.TableColumn;
13  import javax.swing.table.TableColumnModel;
14  import javax.swing.table.TableModel;
15  import java.awt.BorderLayout;
16  import java.awt.Component;
17  import java.awt.Dimension;
18  import java.awt.Point;
19  import java.awt.Toolkit;
20  import java.awt.datatransfer.StringSelection;
21  import java.awt.event.ActionEvent;
22  import java.awt.event.ActionListener;
23  import java.awt.event.ItemEvent;
24  import java.awt.event.ItemListener;
25  import java.awt.event.KeyEvent;
26  import java.awt.event.MouseAdapter;
27  import java.awt.event.MouseEvent;
28  import java.io.File;
29  import java.io.FileOutputStream;
30  import java.io.IOException;
31  import java.io.PrintWriter;
32  import java.util.ArrayList;
33  import java.util.Collections;
34  import java.util.Comparator;
35  import java.util.HashMap;
36  import java.util.HashSet;
37  import java.util.Iterator;
38  import java.util.List;
39  import java.util.Map;
40  import java.util.Properties;
41  import java.util.Set;
42  import net.sourceforge.pmd.PMD;
43  
44  public class GUI implements CPDListener {
45  
46  	private interface Renderer {
47  		String render(Iterator<Match> items);
48  	}
49  	
50  	private static final Object[][] rendererSets = new Object[][] {
51  		{ "Text", 		new Renderer() { public String render(Iterator<Match> items) { return new SimpleRenderer().render(items); } } },
52  		{ "XML", 		new Renderer() { public String render(Iterator<Match> items) { return new XMLRenderer().render(items); } } },
53  		{ "CSV (comma)",new Renderer() { public String render(Iterator<Match> items) { return new CSVRenderer(',').render(items); } } },
54  		{ "CSV (tab)",	new Renderer() { public String render(Iterator<Match> items) { return new CSVRenderer('\t').render(items); } } }
55  		};
56  	
57  	private interface LanguageConfig {
58  		Language languageFor(LanguageFactory lf, Properties p);
59  		boolean ignoreLiteralsByDefault();
60  		String[] extensions();
61  	};
62  	
63  	private static final Object[][] languageSets = new Object[][] {
64  		{"Java", 			new LanguageConfig() { 
65  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("java"); }
66  									public boolean ignoreLiteralsByDefault() { return true; }
67  									public String[] extensions() { return new String[] {".java", ".class" }; }; } },
68  		{"JSP", 			new LanguageConfig() { 
69  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("jsp"); }
70  									public boolean ignoreLiteralsByDefault() { return false; }
71  									public String[] extensions() { return new String[] {".jsp" }; }; } },
72  		{"C++", 			new LanguageConfig() { 
73  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("cpp"); }
74  									public boolean ignoreLiteralsByDefault() { return false; }
75  									public String[] extensions() { return new String[] {".cpp", ".c" }; }; } },
76  		{"Ruby",			new LanguageConfig() { 
77  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("ruby"); }
78  									public boolean ignoreLiteralsByDefault() { return false; }
79  									public String[] extensions() { return new String[] {".rb" }; }; } },
80  		{"Fortran",			new LanguageConfig() {
81  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("fortran"); }
82  									public boolean ignoreLiteralsByDefault() { return false; }
83  									public String[] extensions() { return new String[] {".rb" }; }; } },
84  		{"by extension...", new LanguageConfig() {
85  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage(LanguageFactory.BY_EXTENSION, p); }
86  									public boolean ignoreLiteralsByDefault() { return false; }
87  									public String[] extensions() { return new String[] {"" }; }; } },
88  		{"PHP", 			new LanguageConfig() { 
89  									public Language languageFor(LanguageFactory lf, Properties p) { return lf.createLanguage("php"); }
90  									public boolean ignoreLiteralsByDefault() { return false; }
91  									public String[] extensions() { return new String[] {".php" }; };	} },
92  		};
93  	
94  	private static final int		defaultCPDMinimumLength = 75;
95  	private static final Map		langConfigsByLabel = new HashMap(languageSets.length);
96  	private static final KeyStroke	copy = KeyStroke.getKeyStroke(KeyEvent.VK_C,ActionEvent.CTRL_MASK,false);
97  	private static final KeyStroke	delete = KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0);
98  	
99  	private class ColumnSpec {
100 		private String label;
101 		private int alignment;
102 		private int width;
103 		private Comparator<Match> sorter;
104 		
105 		public ColumnSpec(String aLabel, int anAlignment, int aWidth, Comparator<Match> aSorter) {
106 			label = aLabel;
107 			alignment = anAlignment;
108 			width = aWidth;
109 			sorter = aSorter;
110 		}
111 		public String label() { return label; };
112 		public int alignment() { return alignment; };
113 		public int width() { return width; };
114 		public Comparator<Match> sorter() { return sorter; };
115 	}
116 
117 	private final ColumnSpec[] matchColumns = new ColumnSpec[] {
118 		new ColumnSpec("Source", 	SwingConstants.LEFT, -1, Match.LabelComparator),
119 		new ColumnSpec("Matches", 	SwingConstants.RIGHT, 60, Match.MatchesComparator),
120 		new ColumnSpec("Lines", 	SwingConstants.RIGHT, 45, Match.LinesComparator),
121 		};
122     
123 	static {		
124 		for (int i=0; i<languageSets.length; i++) {
125 			langConfigsByLabel.put(languageSets[i][0], languageSets[i][1]);
126 		}
127 	}
128 	
129 	private static LanguageConfig languageConfigFor(String label) {
130 		return (LanguageConfig)langConfigsByLabel.get(label);
131 	}
132 	
133     private static class CancelListener implements ActionListener {
134         public void actionPerformed(ActionEvent e) {
135             System.exit(0);
136         }
137     }
138 
139     private class GoListener implements ActionListener {
140         public void actionPerformed(ActionEvent e) {
141             new Thread(new Runnable() {
142                 public void run() {
143                     tokenizingFilesBar.setValue(0);
144                     tokenizingFilesBar.setString("");
145                     resultsTextArea.setText("");
146                     phaseLabel.setText("");
147                     timeField.setText("");
148                     go();
149                 }
150             }).start();
151         }
152     }
153     
154     private class SaveListener implements ActionListener {
155     	
156     	final Renderer renderer;
157     	
158     	public SaveListener(Renderer theRenderer) {
159     		renderer = theRenderer;
160     	}
161     	
162         public void actionPerformed(ActionEvent evt) {
163             JFileChooser fcSave	= new JFileChooser();
164             int ret = fcSave.showSaveDialog(GUI.this.frame);
165             File f = fcSave.getSelectedFile();
166             if (f == null || ret != JFileChooser.APPROVE_OPTION) return;
167                         
168             if (!f.canWrite()) {
169                 PrintWriter pw = null;
170                 try {
171                     pw = new PrintWriter(new FileOutputStream(f));
172                     pw.write(renderer.render(matches.iterator()));
173                     pw.flush();
174                     JOptionPane.showMessageDialog(frame, "Saved " + matches.size() + " matches");
175                 } catch (IOException e) {
176                     error("Couldn't save file" + f.getAbsolutePath(), e);
177                 } finally {
178                     if (pw != null) pw.close();
179                 }
180             } else {
181                 error("Could not write to file " + f.getAbsolutePath(), null);
182             }
183         }
184 
185         private void error(String message, Exception e) {
186             if (e != null) {
187                 e.printStackTrace();
188             }
189             JOptionPane.showMessageDialog(GUI.this.frame, message);
190         }
191 
192     }
193 
194     private class BrowseListener implements ActionListener {
195         public void actionPerformed(ActionEvent e) {
196             JFileChooser fc = new JFileChooser(rootDirectoryField.getText());
197             fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
198             fc.showDialog(frame, "Select");
199             if (fc.getSelectedFile() != null) {
200                 rootDirectoryField.setText(fc.getSelectedFile().getAbsolutePath());
201             }
202         }
203     }
204     
205 	private class AlignmentRenderer extends DefaultTableCellRenderer {
206 		
207 		private int[] alignments;
208 		
209 		public AlignmentRenderer(int[] theAlignments) {
210 			alignments = theAlignments;
211 		};
212 		
213 		public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
214 			super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
215  
216 			setHorizontalAlignment(alignments[column]);
217  
218 			return this;
219 		}
220 	}
221     
222     private JTextField rootDirectoryField	= new JTextField(System.getProperty("user.home"));
223     private JTextField minimumLengthField	= new JTextField(Integer.toString(defaultCPDMinimumLength));
224     private JTextField encodingField		= new JTextField(System.getProperty("file.encoding"));
225     private JTextField timeField			= new JTextField(6);
226     private JLabel phaseLabel				= new JLabel();
227     private JProgressBar tokenizingFilesBar = new JProgressBar();
228     private JTextArea resultsTextArea		= new JTextArea();
229     private JCheckBox recurseCheckbox		= new JCheckBox("", true);
230     private JCheckBox ignoreLiteralsCheckbox = new JCheckBox("", false);
231     private JComboBox languageBox			= new JComboBox();
232     private JTextField extensionField		= new JTextField();
233     private JLabel extensionLabel			= new JLabel("Extension:", SwingConstants.RIGHT);
234     private JTable resultsTable				= new JTable();    
235     private JButton goButton;
236     private JButton cancelButton;
237     private JPanel progressPanel;
238     private JFrame frame;
239     private boolean trimLeadingWhitespace;
240 
241     private List<Match> matches = new ArrayList<Match>();
242 
243     private void addSaveOptionsTo(JMenu menu) {
244     	
245         JMenuItem saveItem;
246         
247         for (int i=0; i<rendererSets.length; i++) {
248         	saveItem = new JMenuItem("Save as " + rendererSets[i][0]);
249         	saveItem.addActionListener(new SaveListener((Renderer)rendererSets[i][1]));
250         	menu.add(saveItem);
251         }
252     }
253     
254     public GUI() {
255         frame = new JFrame("PMD Duplicate Code Detector (v " + PMD.VERSION + ')');
256 
257         timeField.setEditable(false);
258 
259         JMenu fileMenu = new JMenu("File");
260         fileMenu.setMnemonic('f');
261         
262         addSaveOptionsTo(fileMenu);
263              
264         JMenuItem exitItem = new JMenuItem("Exit");
265         exitItem.setMnemonic('x');
266         exitItem.addActionListener(new CancelListener());
267         fileMenu.add(exitItem);
268         JMenu viewMenu = new JMenu("View");
269         fileMenu.setMnemonic('v');
270         JMenuItem trimItem = new JCheckBoxMenuItem("Trim leading whitespace");
271         trimItem.addItemListener(new ItemListener() {
272             public void itemStateChanged(ItemEvent e) {
273                 AbstractButton button = (AbstractButton)e.getItem();
274                 GUI.this.trimLeadingWhitespace = button.isSelected();
275             }
276         });
277         viewMenu.add(trimItem);
278         JMenuBar menuBar = new JMenuBar();
279         menuBar.add(fileMenu);
280         menuBar.add(viewMenu);
281         frame.setJMenuBar(menuBar);
282 
283         // first make all the buttons
284         JButton browseButton = new JButton("Browse");
285         browseButton.setMnemonic('b');
286         browseButton.addActionListener(new BrowseListener());
287         goButton = new JButton("Go");
288         goButton.setMnemonic('g');
289         goButton.addActionListener(new GoListener());
290         cancelButton = new JButton("Cancel");
291         cancelButton.addActionListener(new CancelListener());
292 
293         JPanel settingsPanel = makeSettingsPanel(browseButton, goButton, cancelButton);
294         progressPanel = makeProgressPanel();
295         JPanel resultsPanel = makeResultsPanel();
296 
297         adjustLanguageControlsFor((LanguageConfig)languageSets[0][1]);
298         
299         frame.getContentPane().setLayout(new BorderLayout());
300         JPanel topPanel = new JPanel();
301         topPanel.setLayout(new BorderLayout());
302         topPanel.add(settingsPanel, BorderLayout.NORTH);
303         topPanel.add(progressPanel, BorderLayout.CENTER);
304         setProgressControls(false);	// not running now        
305         frame.getContentPane().add(topPanel, BorderLayout.NORTH);
306         frame.getContentPane().add(resultsPanel, BorderLayout.CENTER);
307         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
308         frame.pack();
309         frame.setVisible(true);
310     }
311 
312     private void adjustLanguageControlsFor(LanguageConfig current) {
313     	 ignoreLiteralsCheckbox.setEnabled(current.ignoreLiteralsByDefault());
314          extensionField.setText(current.extensions()[0]);
315          boolean enableExtension = current.extensions()[0].length() == 0;
316          extensionField.setEnabled(enableExtension);
317          extensionLabel.setEnabled(enableExtension);
318     }
319     
320     private JPanel makeSettingsPanel(JButton browseButton, JButton goButton, JButton cxButton) {
321         JPanel settingsPanel = new JPanel();
322         GridBagHelper helper = new GridBagHelper(settingsPanel, new double[]{0.2, 0.7, 0.1, 0.1});
323         helper.addLabel("Root source directory:");
324         helper.add(rootDirectoryField);
325         helper.add(browseButton, 2);
326         helper.nextRow();
327         helper.addLabel("Report duplicate chunks larger than:");
328         minimumLengthField.setColumns(4);
329         helper.add(minimumLengthField);
330         helper.addLabel("Language:");
331         for (int i=0; i<languageSets.length; i++) {
332         	languageBox.addItem(languageSets[i][0]);
333         }
334         languageBox.addActionListener(new ActionListener() {
335             public void actionPerformed(ActionEvent e) {
336             	adjustLanguageControlsFor(
337             			languageConfigFor((String)languageBox.getSelectedItem())
338             			);
339             }
340         });
341         helper.add(languageBox);
342         helper.nextRow();
343         helper.addLabel("Also scan subdirectories?");
344         helper.add(recurseCheckbox);
345 
346         helper.add(extensionLabel);
347         helper.add(extensionField);
348 
349         helper.nextRow();
350         helper.addLabel("Ignore literals and identifiers?");
351         helper.add(ignoreLiteralsCheckbox);
352         helper.add(goButton);
353         helper.add(cxButton);
354         helper.nextRow();
355 
356         helper.addLabel("File encoding (defaults based upon locale):");
357         encodingField.setColumns(1);
358         helper.add(encodingField);
359         helper.addLabel("");
360         helper.addLabel("");
361         helper.nextRow();
362 //        settingsPanel.setBorder(BorderFactory.createTitledBorder("Settings"));
363         return settingsPanel;
364     }
365 
366     private JPanel makeProgressPanel() {
367         JPanel progressPanel = new JPanel();
368         final double[] weights = {0.0, 0.8, 0.4, 0.2};
369         GridBagHelper helper = new GridBagHelper(progressPanel, weights);
370         helper.addLabel("Tokenizing files:");
371         helper.add(tokenizingFilesBar, 3);
372         helper.nextRow();
373         helper.addLabel("Phase:");
374         helper.add(phaseLabel);
375         helper.addLabel("Time elapsed:");
376         helper.add(timeField);
377         helper.nextRow();
378         progressPanel.setBorder(BorderFactory.createTitledBorder("Progress"));
379         return progressPanel;
380     }
381     
382     private JPanel makeResultsPanel() {
383         JPanel resultsPanel = new JPanel();
384         resultsPanel.setLayout(new BorderLayout());
385         JScrollPane areaScrollPane = new JScrollPane(resultsTextArea);
386         resultsTextArea.setEditable(false);
387         areaScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
388         areaScrollPane.setPreferredSize(new Dimension(600, 300));
389         
390         resultsPanel.add(makeMatchList(), BorderLayout.WEST);
391         resultsPanel.add(areaScrollPane, BorderLayout.CENTER);
392         return resultsPanel;
393     }
394 
395     private void populateResultArea() {
396     	int[] selectionIndices = resultsTable.getSelectedRows();
397     	TableModel model = resultsTable.getModel();
398     	List<Match> selections = new ArrayList<Match>(selectionIndices.length);
399     	for (int i=0; i<selectionIndices.length; i++) {
400     		selections.add((Match)model.getValueAt(selectionIndices[i], 99));
401     	}
402     	String report = new SimpleRenderer(trimLeadingWhitespace).render(selections.iterator());
403     	resultsTextArea.setText(report);
404     	resultsTextArea.setCaretPosition(0);	// move to the top
405     }
406         
407     private void copyMatchListSelectionsToClipboard() {
408     	
409     	int[] selectionIndices = resultsTable.getSelectedRows();
410     	int colCount = resultsTable.getColumnCount();
411     	
412     	StringBuffer sb = new StringBuffer();
413     	    	
414     	for (int r=0; r<selectionIndices.length; r++) {
415 			if (r > 0) sb.append('\n');
416 			sb.append(resultsTable.getValueAt(selectionIndices[r], 0));
417     		for (int c=1; c<colCount; c++) {
418     			sb.append('\t');
419     			sb.append(resultsTable.getValueAt(selectionIndices[r], c));
420     		}
421     	}
422     	
423     	StringSelection ss = new StringSelection(sb.toString());
424         Toolkit.getDefaultToolkit().getSystemClipboard().setContents(ss, null);
425     }
426     
427     private void deleteMatchlistSelections() {
428     	
429     	int[] selectionIndices = resultsTable.getSelectedRows();
430     	
431     	for (int i=selectionIndices.length-1; i >=0; i--) {
432     		matches.remove(selectionIndices[i]);
433     	}
434     	
435     	resultsTable.getSelectionModel().clearSelection();
436     	resultsTable.addNotify();
437     }
438     
439     private JComponent makeMatchList() {
440     	
441     	resultsTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
442 			public void valueChanged(ListSelectionEvent e) {
443 				populateResultArea();				
444 			}});
445     	
446     	resultsTable.registerKeyboardAction(new ActionListener() {
447 			public void actionPerformed(ActionEvent e) { copyMatchListSelectionsToClipboard(); } 
448     		},"Copy", copy, JComponent.WHEN_FOCUSED);
449     	
450     	resultsTable.registerKeyboardAction(new ActionListener() {
451 			public void actionPerformed(ActionEvent e) { deleteMatchlistSelections(); } 
452     		},"Del", delete, JComponent.WHEN_FOCUSED);
453     	
454     	int[] alignments = new int[matchColumns.length];
455     	for (int i=0; i<alignments.length; i++) alignments[i] = matchColumns[i].alignment();
456 
457     	resultsTable.setDefaultRenderer(Object.class, new AlignmentRenderer(alignments));
458     	
459     	final JTableHeader header = resultsTable.getTableHeader();
460     	header.addMouseListener( new MouseAdapter() {
461 			public void mouseClicked(MouseEvent e) {
462 				sortOnColumn(header.columnAtPoint(new Point(e.getX(), e.getY())));
463 				}
464 			});
465     	
466         return new JScrollPane(resultsTable);
467     }
468     
469     private boolean isLegalPath(String path, LanguageConfig config) {
470     	String[] extensions = config.extensions();
471     	for (int i=0; i<extensions.length; i++) {
472     		if (path.endsWith(extensions[i]) && extensions[i].length() > 0) return true;
473     	}
474     	return false;
475     }
476     
477     private String setLabelFor(Match match) {
478     	
479     	Set<String> sourceIDs = new HashSet<String>(match.getMarkCount());
480     	for (Iterator<TokenEntry> occurrences = match.iterator(); occurrences.hasNext();) {
481              sourceIDs.add(occurrences.next().getTokenSrcID());
482           }
483     	String label;
484     	
485     	if (sourceIDs.size() == 1) {
486     		String sourceId = sourceIDs.iterator().next();
487     		int separatorPos = sourceId.lastIndexOf(File.separatorChar);
488     		label = "..." + sourceId.substring(separatorPos);
489     		} else {
490     	    	label = "(" + sourceIDs.size() + " separate files)";
491     		}
492     		
493     	match.setLabel(label);
494     	return label;
495     }
496     
497     private void setProgressControls(boolean isRunning) {
498         progressPanel.setVisible(isRunning);
499         goButton.setEnabled(!isRunning);
500         cancelButton.setEnabled(isRunning);
501     }
502     
503     private void go() {
504     	String dirPath = rootDirectoryField.getText();
505         try {
506             if (!(new File(dirPath)).exists()) {
507                 JOptionPane.showMessageDialog(frame,
508                         "Can't read from that root source directory",
509                         "Error", JOptionPane.ERROR_MESSAGE);
510                 return;
511             }
512       
513             setProgressControls(true);
514 
515             Properties p = new Properties();
516             p.setProperty(JavaTokenizer.IGNORE_LITERALS, String.valueOf(ignoreLiteralsCheckbox.isSelected()));
517             p.setProperty(LanguageFactory.EXTENSION, extensionField.getText());
518             LanguageConfig conf = languageConfigFor((String)languageBox.getSelectedItem());
519             Language language = conf.languageFor(new LanguageFactory(), p);
520             CPD cpd = new CPD(Integer.parseInt(minimumLengthField.getText()), language);
521             cpd.setEncoding(encodingField.getText());
522             cpd.setCpdListener(this);
523             tokenizingFilesBar.setMinimum(0);
524             phaseLabel.setText("");
525             if (isLegalPath(dirPath, conf)) {	// should use the language file filter instead?
526             	cpd.add(new File(dirPath));
527             } else {
528                 if (recurseCheckbox.isSelected()) {
529                     cpd.addRecursively(dirPath);
530                 } else {
531                     cpd.addAllInDirectory(dirPath);
532                 }
533             }
534             final long start = System.currentTimeMillis();
535             Timer t = new Timer(1000, new ActionListener() {
536                 public void actionPerformed(ActionEvent e) {
537                     long now = System.currentTimeMillis();
538                     long elapsedMillis = now - start;
539                     long elapsedSeconds = elapsedMillis / 1000;
540                     long minutes = (long) Math.floor(elapsedSeconds / 60);
541                     long seconds = elapsedSeconds - (minutes * 60);
542                     timeField.setText(munge(String.valueOf(minutes)) + ':' + munge(String.valueOf(seconds)));
543                 }
544 
545                 private String munge(String in) {
546                     if (in.length() < 2) {
547                         in = "0" + in;
548                     }
549                     return in;
550                 }
551             });
552             t.start();
553             cpd.go();
554             t.stop();
555             
556         	matches = new ArrayList<Match>();
557         	Match match;
558         	for (Iterator<Match> i = cpd.getMatches(); i.hasNext();) {
559         		match = i.next();
560         		setLabelFor(match);
561         		matches.add(match);
562         	}
563 
564             String report = new SimpleRenderer().render(cpd.getMatches());
565             if (report.length() == 0) {
566                 JOptionPane.showMessageDialog(frame,
567                         "Done; couldn't find any duplicates longer than " + minimumLengthField.getText() + " tokens");
568             } else {
569                 resultsTextArea.setText(report);
570                 setListDataFrom(cpd.getMatches());
571                 
572             }
573         } catch (IOException t) {
574             t.printStackTrace();
575             JOptionPane.showMessageDialog(frame, "Halted due to " + t.getClass().getName() + "; " + t.getMessage());
576         } catch (RuntimeException t) {
577             t.printStackTrace();
578             JOptionPane.showMessageDialog(frame, "Halted due to " + t.getClass().getName() + "; " + t.getMessage());
579         }
580         setProgressControls(false);
581     }
582 	
583     private interface SortingTableModel<E> extends TableModel {
584     	public int sortColumn();
585     	public void sortColumn(int column);
586     	public boolean sortDescending();
587     	public void sortDescending(boolean flag);
588     	public void sort(Comparator<E> comparator);
589     }
590     
591     private TableModel tableModelFrom(final List<Match> items) {
592     	
593     	TableModel model = new SortingTableModel<Match>() {
594     		
595     		private int sortColumn;
596     		private boolean sortDescending;
597     		
598     		 public Object getValueAt(int rowIndex, int columnIndex) {
599     			Match match = items.get(rowIndex);
600     			switch (columnIndex) {
601     				case 0: return match.getLabel();
602     				case 2: return Integer.toString(match.getLineCount());
603     				case 1: return match.getMarkCount() > 2 ? Integer.toString(match.getMarkCount()) : "";
604     				case 99: return match;
605     				}
606     			return "";
607     		 	}
608 			public int getColumnCount() { return matchColumns.length;	}
609 			public int getRowCount() {	return items.size(); }
610 			public boolean isCellEditable(int rowIndex, int columnIndex) {	return false;	}
611 			public Class<?> getColumnClass(int columnIndex) { return Object.class;	}
612 			public void setValueAt(Object aValue, int rowIndex, int columnIndex) {	}
613 			public String getColumnName(int i) {	return matchColumns[i].label();	}
614 			public void addTableModelListener(TableModelListener l) { }
615 			public void removeTableModelListener(TableModelListener l) { }
616 			public int sortColumn() { return sortColumn; };
617 			public void sortColumn(int column) { sortColumn = column; };
618 			public boolean sortDescending() { return sortDescending; };
619 			public void sortDescending(boolean flag) { sortDescending = flag; };
620 			public void sort(Comparator<Match> comparator) { 
621 				Collections.sort(items, comparator);
622 				if (sortDescending) Collections.reverse(items);
623 				}
624     		};
625     	
626     	return model;
627     }    
628         
629     private void sortOnColumn(int columnIndex) {
630     	Comparator<Match> comparator = matchColumns[columnIndex].sorter();
631     	SortingTableModel<Match> model = (SortingTableModel<Match>)resultsTable.getModel();
632     	if (model.sortColumn() == columnIndex) {
633     		model.sortDescending(!model.sortDescending());
634     	}
635     	model.sortColumn(columnIndex);
636     	model.sort(comparator);
637     	
638     	resultsTable.getSelectionModel().clearSelection();    	
639     	resultsTable.repaint();
640     }
641     
642     private void setListDataFrom(Iterator iter) {
643 
644     	resultsTable.setModel(tableModelFrom(matches));
645     	
646     	TableColumnModel colModel = resultsTable.getColumnModel();
647     	TableColumn column;
648     	int width;
649     	
650     	for (int i=0; i<matchColumns.length; i++) {
651     		if (matchColumns[i].width() > 0) {
652     			column = colModel.getColumn(i);
653     			width = matchColumns[i].width();
654     			column.setPreferredWidth(width);
655     			column.setMinWidth(width);
656     			column.setMaxWidth(width);
657     		}
658     	}    	
659     }
660     
661     // CPDListener
662     public void phaseUpdate(int phase) {
663         phaseLabel.setText(getPhaseText(phase));
664     }
665 
666     public String getPhaseText(int phase) {
667         switch (phase) {
668             case CPDListener.INIT:
669                 return "Initializing";
670             case CPDListener.HASH:
671                 return "Hashing";
672             case CPDListener.MATCH:
673                 return "Matching";
674             case CPDListener.GROUPING:
675                 return "Grouping";
676             case CPDListener.DONE:
677                 return "Done";
678             default :
679                 return "Unknown";
680         }
681     }
682 
683     public void addedFile(int fileCount, File file) {
684         tokenizingFilesBar.setMaximum(fileCount);
685         tokenizingFilesBar.setValue(tokenizingFilesBar.getValue() + 1);
686     }
687     // CPDListener
688 
689     
690     public static void main(String[] args) {
691     	//this should prevent the disk not found popup
692         // System.setSecurityManager(null);
693         new GUI();
694     }
695 
696 }