git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/gui/dialogs/MotorChooserDialog.java

   1 package net.sf.openrocket.gui.dialogs;
   2
   3
   4 import java.awt.Dialog;
   5 import java.awt.Font;
   6 import java.awt.Rectangle;
   7 import java.awt.Window;
   8 import java.awt.event.ActionEvent;
   9 import java.awt.event.ActionListener;
  10 import java.awt.event.MouseAdapter;
  11 import java.awt.event.MouseEvent;
  12 import java.text.Collator;
  13 import java.util.ArrayList;
  14 import java.util.Comparator;
  15 import java.util.Locale;
  16 import java.util.regex.Matcher;
  17 import java.util.regex.Pattern;
  18
  19 import javax.swing.DefaultComboBoxModel;
  20 import javax.swing.JButton;
  21 import javax.swing.JComboBox;
  22 import javax.swing.JDialog;
  23 import javax.swing.JLabel;
  24 import javax.swing.JPanel;
  25 import javax.swing.JScrollPane;
  26 import javax.swing.JTable;
  27 import javax.swing.JTextField;
  28 import javax.swing.ListSelectionModel;
  29 import javax.swing.RowFilter;
  30 import javax.swing.event.DocumentEvent;
  31 import javax.swing.event.DocumentListener;
  32 import javax.swing.event.ListSelectionEvent;
  33 import javax.swing.event.ListSelectionListener;
  34 import javax.swing.table.AbstractTableModel;
  35 import javax.swing.table.TableModel;
  36 import javax.swing.table.TableRowSorter;
  37
  38 import net.miginfocom.swing.MigLayout;
  39 import net.sf.openrocket.database.Databases;
  40 import net.sf.openrocket.gui.components.StyledLabel;
  41 import net.sf.openrocket.motor.Motor;
  42 import net.sf.openrocket.unit.UnitGroup;
  43 import net.sf.openrocket.util.GUIUtil;
  44 import net.sf.openrocket.util.Prefs;
  45
  46 public class MotorChooserDialog extends JDialog {
  47
  48         private static final int SHOW_ALL = 0;
  49         private static final int SHOW_SMALLER = 1;
  50         private static final int SHOW_EXACT = 2;
  51         private static final String[] SHOW_DESCRIPTIONS = {
  52                 "Show all motors",
  53                 "Show motors with diameter less than that of the motor mount",
  54                 "Show motors with diameter equal to that of the motor mount"
  55         };
  56         private static final int SHOW_MAX = 2;
  57
  58         private final JTextField searchField;
  59         private String[] searchTerms = new String[0];
  60
  61         private final double diameter;
  62
  63         private Motor selectedMotor = null;
  64         private double selectedDelay = 0;
  65
  66         private JTable table;
  67         private TableRowSorter<TableModel> sorter;
  68         private JComboBox delayBox;
  69         private MotorDatabaseModel model;
  70
  71         private boolean okClicked = false;
  72
  73
  74         public MotorChooserDialog(double diameter) {
  75                 this(null,5,diameter,null);
  76         }
  77
  78         public MotorChooserDialog(Motor current, double delay, double diameter) {
  79                 this(current,delay,diameter,null);
  80         }
  81
  82         public MotorChooserDialog(Motor current, double delay, double diameter, Window owner) {
  83                 super(owner, "Select a rocket motor", Dialog.ModalityType.APPLICATION_MODAL);
  84
  85                 JButton button;
  86
  87                 this.selectedMotor = current;
  88                 this.selectedDelay = delay;
  89                 this.diameter = diameter;
  90
  91                 JPanel panel = new JPanel(new MigLayout("fill", "[grow][]"));
  92
  93                 // Label
  94                 JLabel label = new JLabel("Select a rocket motor:");
  95                 label.setFont(label.getFont().deriveFont(Font.BOLD));
  96                 panel.add(label,"growx");
  97
  98                 label = new JLabel("Motor mount diameter: " +
  99                                 UnitGroup.UNITS_MOTOR_DIMENSIONS.getDefaultUnit().toStringUnit(diameter));
 100                 panel.add(label,"gapleft para, wrap paragraph");
 101
 102
 103                 // Diameter selection
 104                 JComboBox combo = new JComboBox(SHOW_DESCRIPTIONS);
 105                 combo.addActionListener(new ActionListener() {
 106                         @Override
 107                         public void actionPerformed(ActionEvent e) {
 108                                 JComboBox cb = (JComboBox) e.getSource();
 109                                 int sel = cb.getSelectedIndex();
 110                                 if ((sel < 0) || (sel > SHOW_MAX))
 111                                         sel = SHOW_ALL;
 112                                 switch (sel) {
 113                                 case SHOW_ALL:
 114                                         sorter.setRowFilter(new MotorRowFilterAll());
 115                                         break;
 116
 117                                 case SHOW_SMALLER:
 118                                         sorter.setRowFilter(new MotorRowFilterSmaller());
 119                                         break;
 120
 121                                 case SHOW_EXACT:
 122                                         sorter.setRowFilter(new MotorRowFilterExact());
 123                                         break;
 124
 125                                 default:
 126                                         assert(false) : "Should not occur.";
 127                                 }
 128                                 Prefs.putChoise("MotorDiameterMatch", sel);
 129                                 setSelectionVisible();
 130                         }
 131                 });
 132                 panel.add(combo,"growx 1000");
 133
 134
 135
 136                 label = new JLabel("Search:");
 137                 panel.add(label, "gapleft para, split 2");
 138
 139                 searchField = new JTextField();
 140                 searchField.getDocument().addDocumentListener(new DocumentListener() {
 141                         @Override
 142                         public void changedUpdate(DocumentEvent e) {
 143                                 update();
 144                         }
 145                         @Override
 146                         public void insertUpdate(DocumentEvent e) {
 147                                 update();
 148                         }
 149                         @Override
 150                         public void removeUpdate(DocumentEvent e) {
 151                                 update();
 152                         }
 153
 154                         private void update() {
 155                                 String text = searchField.getText().trim();
 156                                 String[] split = text.split("\\s+");
 157                                 ArrayList<String> list = new ArrayList<String>();
 158                                 for (String s: split) {
 159                                         s = s.trim().toLowerCase();
 160                                         if (s.length() > 0) {
 161                                                 list.add(s);
 162                                         }
 163                                 }
 164                                 searchTerms = list.toArray(new String[0]);
 165                                 sorter.sort();
 166                         }
 167                 });
 168                 panel.add(searchField, "growx 1, wrap");
 169
 170
 171
 172                 // Table, overridden to show meaningful tooltip texts
 173                 model = new MotorDatabaseModel(current);
 174                 table = new JTable(model) {
 175                         @Override
 176                         public String getToolTipText(MouseEvent e) {
 177                         java.awt.Point p = e.getPoint();
 178                         int colIndex = columnAtPoint(p);
 179                         int viewRow = rowAtPoint(p);
 180                         if (viewRow < 0)
 181                                 return null;
 182                         int rowIndex = convertRowIndexToModel(viewRow);
 183                         Motor motor = model.getMotor(rowIndex);
 184
 185                         if (colIndex < 0 || colIndex >= MotorColumns.values().length)
 186                                 return null;
 187
 188                         return MotorColumns.values()[colIndex].getToolTipText(motor);
 189                         }
 190                 };
 191
 192                 // Set comparators and widths
 193                 table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
 194                 sorter = new TableRowSorter<TableModel>(model);
 195                 for (int i=0; i < MotorColumns.values().length; i++) {
 196                         MotorColumns column = MotorColumns.values()[i];
 197                         sorter.setComparator(i, column.getComparator());
 198                         table.getColumnModel().getColumn(i).setPreferredWidth(column.getWidth());
 199                 }
 200                 table.setRowSorter(sorter);
 201
 202                 // Set selection and double-click listeners
 203                 table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
 204                         @Override
 205                         public void valueChanged(ListSelectionEvent e) {
 206                                 int row = table.getSelectedRow();
 207                                 if (row >= 0) {
 208                                         row = table.convertRowIndexToModel(row);
 209                                         Motor m = model.getMotor(row);
 210                                         if (!m.equals(selectedMotor)) {
 211                                                 selectedMotor = model.getMotor(row);
 212                                                 setDelays(true);  // Reset delay times
 213                                         }
 214                                 }
 215                         }
 216                 });
 217                 table.addMouseListener(new MouseAdapter() {
 218                         @Override
 219                         public void mouseClicked(MouseEvent e) {
 220                                 if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() == 2) {
 221                                         okClicked = true;
 222                                         MotorChooserDialog.this.setVisible(false);
 223                                 }
 224                         }
 225                 });
 226                 // (Current selection and scrolling performed later)
 227
 228                 JScrollPane scrollpane = new JScrollPane();
 229                 scrollpane.setViewportView(table);
 230                 panel.add(scrollpane,"spanx, grow, width :700:, height :300:, wrap paragraph");
 231
 232
 233                 // Ejection delay
 234                 panel.add(new JLabel("Select ejection charge delay:"), "spanx, split 3, gap rel");
 235
 236                 delayBox = new JComboBox();
 237                 delayBox.setEditable(true);
 238                 delayBox.addActionListener(new ActionListener() {
 239                         @Override
 240                         public void actionPerformed(ActionEvent e) {
 241                                 JComboBox cb = (JComboBox) e.getSource();
 242                                 String sel = (String)cb.getSelectedItem();
 243                                 if (sel.equalsIgnoreCase("None")) {
 244                                         selectedDelay = Motor.PLUGGED;
 245                                 } else {
 246                                         try {
 247                                                 selectedDelay = Double.parseDouble(sel);
 248                                         } catch (NumberFormatException ignore) { }
 249                                 }
 250                                 setDelays(false);
 251                         }
 252                 });
 253                 panel.add(delayBox,"gapright unrel");
 254                 panel.add(new StyledLabel("(Number of seconds or \"None\")", -1), "wrap para");
 255                 setDelays(false);
 256
 257
 258                 JButton okButton = new JButton("OK");
 259                 okButton.addActionListener(new ActionListener() {
 260                         @Override
 261                         public void actionPerformed(ActionEvent e) {
 262                                 okClicked = true;
 263                                 MotorChooserDialog.this.setVisible(false);
 264                         }
 265                 });
 266                 panel.add(okButton,"spanx, split, tag ok");
 267
 268                 button = new JButton("Cancel");
 269                 button.addActionListener(new ActionListener() {
 270                         @Override
 271                         public void actionPerformed(ActionEvent e) {
 272                                 MotorChooserDialog.this.setVisible(false);
 273                         }
 274                 });
 275                 panel.add(button,"tag cancel");
 276
 277
 278                 // Sets the filter:
 279                 int showMode = Prefs.getChoise("MotorDiameterMatch", SHOW_MAX, SHOW_EXACT);
 280                 combo.setSelectedIndex(showMode);
 281
 282
 283                 this.add(panel);
 284                 this.pack();
 285 //              this.setAlwaysOnTop(true);
 286
 287                 this.setLocationByPlatform(true);
 288                 GUIUtil.setDisposableDialogOptions(this, okButton);
 289
 290                 // Table can be scrolled only after pack() has been called
 291                 setSelectionVisible();
 292
 293                 // Focus the search field
 294                 searchField.grabFocus();
 295         }
 296
 297         private void setSelectionVisible() {
 298                 if (selectedMotor != null) {
 299                         int index = table.convertRowIndexToView(model.getIndex(selectedMotor));
 300                         table.getSelectionModel().setSelectionInterval(index, index);
 301                         Rectangle rect = table.getCellRect(index, 0, true);
 302                         rect = new Rectangle(rect.x,rect.y-100,rect.width,rect.height+200);
 303                         table.scrollRectToVisible(rect);
 304                 }
 305         }
 306
 307
 308         /**
 309          * Set the values in the delay combo box.  If <code>reset</code> is <code>true</code>
 310          * then sets the selected value as the value closest to selectedDelay, otherwise
 311          * leaves selection alone.
 312          */
 313         private void setDelays(boolean reset) {
 314                 if (selectedMotor == null) {
 315
 316                         delayBox.setModel(new DefaultComboBoxModel(new String[] { "None" }));
 317                         delayBox.setSelectedIndex(0);
 318
 319                 } else {
 320
 321                         double[] delays = selectedMotor.getStandardDelays();
 322                         String[] delayStrings = new String[delays.length];
 323                         double currentDelay = selectedDelay;  // Store current setting locally
 324
 325                         for (int i=0; i < delays.length; i++) {
 326                                 delayStrings[i] = Motor.getDelayString(delays[i], "None");
 327                         }
 328                         delayBox.setModel(new DefaultComboBoxModel(delayStrings));
 329
 330                         if (reset) {
 331
 332                                 // Find and set the closest value
 333                                 double closest = Double.NaN;
 334                                 for (int i=0; i < delays.length; i++) {
 335                                         // if-condition to always become true for NaN
 336                                         if (!(Math.abs(delays[i] - currentDelay) >
 337                                                   Math.abs(closest - currentDelay))) {
 338                                                 closest = delays[i];
 339                                         }
 340                                 }
 341                                 if (!Double.isNaN(closest)) {
 342                                         selectedDelay = closest;
 343                                         delayBox.setSelectedItem(Motor.getDelayString(closest, "None"));
 344                                 } else {
 345                                         delayBox.setSelectedItem("None");
 346                                 }
 347
 348                         } else {
 349
 350                                 selectedDelay = currentDelay;
 351                                 delayBox.setSelectedItem(Motor.getDelayString(currentDelay, "None"));
 352
 353                         }
 354
 355                 }
 356         }
 357
 358
 359
 360         public Motor getSelectedMotor() {
 361                 if (!okClicked)
 362                         return null;
 363                 return selectedMotor;
 364         }
 365
 366
 367         public double getSelectedDelay() {
 368                 return selectedDelay;
 369         }
 370
 371
 372
 373
 374         ////////////////  JTable elements  ////////////////
 375
 376
 377         /**
 378          * Enum defining the table columns.
 379          */
 380         private enum MotorColumns {
 381                 MANUFACTURER("Manufacturer",100) {
 382                         @Override
 383                         public String getValue(Motor m) {
 384                                 return m.getManufacturer().getDisplayName();
 385                         }
 386 //                      @Override
 387 //                      public String getToolTipText(Motor m) {
 388 //                              return "<html>" + m.getDescription().replace((CharSequence)"\n", "<br>");
 389 //                      }
 390                         @Override
 391                         public Comparator<?> getComparator() {
 392                                 return Collator.getInstance();
 393                         }
 394                 },
 395                 DESIGNATION("Designation") {
 396                         @Override
 397                         public String getValue(Motor m) {
 398                                 return m.getDesignation();
 399                         }
 400 //                      @Override
 401 //                      public String getToolTipText(Motor m) {
 402 //                              return "<html>" + m.getDescription().replace((CharSequence)"\n", "<br>");
 403 //                      }
 404                         @Override
 405                         public Comparator<?> getComparator() {
 406                                 return Motor.getDesignationComparator();
 407                         }
 408                 },
 409                 TYPE("Type") {
 410                         @Override
 411                         public String getValue(Motor m) {
 412                                 return m.getMotorType().getName();
 413                         }
 414 //                      @Override
 415 //                      public String getToolTipText(Motor m) {
 416 //                              return m.getMotorType().getDescription();
 417 //                      }
 418                         @Override
 419                         public Comparator<?> getComparator() {
 420                                 return Collator.getInstance();
 421                         }
 422                 },
 423                 DIAMETER("Diameter") {
 424                         @Override
 425                         public String getValue(Motor m) {
 426                                 return UnitGroup.UNITS_MOTOR_DIMENSIONS.getDefaultUnit().toStringUnit(
 427                                                 m.getDiameter());
 428                         }
 429                         @Override
 430                         public Comparator<?> getComparator() {
 431                                 return getNumericalComparator();
 432                         }
 433                 },
 434                 LENGTH("Length") {
 435                         @Override
 436                         public String getValue(Motor m) {
 437                                 return UnitGroup.UNITS_MOTOR_DIMENSIONS.getDefaultUnit().toStringUnit(
 438                                                 m.getLength());
 439                         }
 440                         @Override
 441                         public Comparator<?> getComparator() {
 442                                 return getNumericalComparator();
 443                         }
 444                 },
 445                 IMPULSE("Impulse") {
 446                         @Override
 447                         public String getValue(Motor m) {
 448                                 return UnitGroup.UNITS_IMPULSE.getDefaultUnit().toStringUnit(
 449                                                 m.getTotalImpulse());
 450                         }
 451                         @Override
 452                         public Comparator<?> getComparator() {
 453                                 return getNumericalComparator();
 454                         }
 455                 },
 456                 TIME("Burn time") {
 457                         @Override
 458                         public String getValue(Motor m) {
 459                                 return UnitGroup.UNITS_SHORT_TIME.getDefaultUnit().toStringUnit(
 460                                                 m.getAverageTime());
 461                         }
 462                         @Override
 463                         public Comparator<?> getComparator() {
 464                                 return getNumericalComparator();
 465                         }
 466                 };
 467
 468
 469                 private final String title;
 470                 private final int width;
 471
 472                 MotorColumns(String title) {
 473                         this(title, 50);
 474                 }
 475
 476                 MotorColumns(String title, int width) {
 477                         this.title = title;
 478                         this.width = width;
 479                 }
 480
 481
 482                 public abstract String getValue(Motor m);
 483                 public abstract Comparator<?> getComparator();
 484
 485                 public String getTitle() {
 486                         return title;
 487                 }
 488
 489                 public int getWidth() {
 490                         return width;
 491                 }
 492
 493                 public String getToolTipText(Motor m) {
 494                         String tip = "<html>";
 495                         tip += "<b>" + m.toString() + "</b>";
 496                         tip += " (" + m.getMotorType().getDescription() + ")<br><hr>";
 497
 498                         String desc = m.getDescription().trim();
 499                         if (desc.length() > 0) {
 500                                 tip += "<i>" + desc.replace("\n", "<br>") + "</i><br><hr>";
 501                         }
 502
 503                         tip += ("Diameter: " +
 504                                         UnitGroup.UNITS_MOTOR_DIMENSIONS.getDefaultUnit().toStringUnit(m.getDiameter()) +
 505                                         "<br>");
 506                         tip += ("Length: " +
 507                                         UnitGroup.UNITS_MOTOR_DIMENSIONS.getDefaultUnit().toStringUnit(m.getLength()) +
 508                                         "<br>");
 509                         tip += ("Maximum thrust: " +
 510                                         UnitGroup.UNITS_FORCE.getDefaultUnit().toStringUnit(m.getMaxThrust()) +
 511                                         "<br>");
 512                         tip += ("Average thrust: " +
 513                                         UnitGroup.UNITS_FORCE.getDefaultUnit().toStringUnit(m.getAverageThrust()) +
 514                                         "<br>");
 515                         tip += ("Burn time: " +
 516                                         UnitGroup.UNITS_SHORT_TIME.getDefaultUnit()
 517                                         .toStringUnit(m.getAverageTime()) + "<br>");
 518                         tip += ("Total impulse: " +
 519                                         UnitGroup.UNITS_IMPULSE.getDefaultUnit()
 520                                         .toStringUnit(m.getTotalImpulse()) + "<br>");
 521                         tip += ("Launch mass: " +
 522                                         UnitGroup.UNITS_MASS.getDefaultUnit().toStringUnit(m.getMass(0)) +
 523                                         "<br>");
 524                         tip += ("Empty mass: " +
 525                                         UnitGroup.UNITS_MASS.getDefaultUnit()
 526                                         .toStringUnit(m.getMass(Double.MAX_VALUE)));
 527                         return tip;
 528                 }
 529
 530         }
 531
 532
 533         /**
 534          * The JTable model.  Includes an extra motor, given in the constructor,
 535          * if it is not already in the database.
 536          */
 537         private class MotorDatabaseModel extends AbstractTableModel {
 538                 private final Motor extra;
 539
 540                 public MotorDatabaseModel(Motor current) {
 541                         if (Databases.MOTOR.contains(current))
 542                                 extra = null;
 543                         else
 544                                 extra = current;
 545                 }
 546
 547                 @Override
 548                 public int getColumnCount() {
 549                         return MotorColumns.values().length;
 550                 }
 551
 552                 @Override
 553                 public int getRowCount() {
 554                         if (extra == null)
 555                                 return Databases.MOTOR.size();
 556                         else
 557                                 return Databases.MOTOR.size()+1;
 558                 }
 559
 560                 @Override
 561                 public Object getValueAt(int rowIndex, int columnIndex) {
 562                         MotorColumns column = getColumn(columnIndex);
 563                         if (extra == null) {
 564                                 return column.getValue(Databases.MOTOR.get(rowIndex));
 565                         } else {
 566                                 if (rowIndex == 0)
 567                                         return column.getValue(extra);
 568                                 else
 569                                         return column.getValue(Databases.MOTOR.get(rowIndex - 1));
 570                         }
 571                 }
 572
 573                 @Override
 574                 public String getColumnName(int columnIndex) {
 575                         return getColumn(columnIndex).getTitle();
 576                 }
 577
 578
 579                 public Motor getMotor(int rowIndex) {
 580                         if (extra == null) {
 581                                 return Databases.MOTOR.get(rowIndex);
 582                         } else {
 583                                 if (rowIndex == 0)
 584                                         return extra;
 585                                 else
 586                                         return Databases.MOTOR.get(rowIndex-1);
 587                         }
 588                 }
 589
 590                 public int getIndex(Motor m) {
 591                         if (extra == null) {
 592                                 return Databases.MOTOR.indexOf(m);
 593                         } else {
 594                                 if (extra.equals(m))
 595                                         return 0;
 596                                 else
 597                                         return Databases.MOTOR.indexOf(m)+1;
 598                         }
 599                 }
 600
 601                 private MotorColumns getColumn(int index) {
 602                         return MotorColumns.values()[index];
 603                 }
 604         }
 605
 606
 607         ////////  Row filters
 608
 609         /**
 610          * Abstract adapter class.
 611          */
 612         private abstract class MotorRowFilter extends RowFilter<TableModel,Integer> {
 613                 @Override
 614                 public boolean include(RowFilter.Entry<? extends TableModel, ? extends Integer> entry) {
 615                         int index = entry.getIdentifier();
 616                         Motor m = model.getMotor(index);
 617                         return filterByDiameter(m) && filterByString(m);
 618                 }
 619
 620                 public abstract boolean filterByDiameter(Motor m);
 621
 622
 623                 public boolean filterByString(Motor m) {
 624                         main: for (String s : searchTerms) {
 625                                 for (MotorColumns col : MotorColumns.values()) {
 626                                         String str = col.getValue(m).toLowerCase();
 627                                         if (str.indexOf(s) >= 0)
 628                                                 continue main;
 629                                 }
 630                                 return false;
 631                         }
 632                         return true;
 633                 }
 634         }
 635
 636         /**
 637          * Show all motors.
 638          */
 639         private class MotorRowFilterAll extends MotorRowFilter {
 640                 @Override
 641                 public boolean filterByDiameter(Motor m) {
 642                         return true;
 643                 }
 644         }
 645
 646         /**
 647          * Show motors smaller than the mount.
 648          */
 649         private class MotorRowFilterSmaller extends MotorRowFilter {
 650                 @Override
 651                 public boolean filterByDiameter(Motor m) {
 652                         return (m.getDiameter() <= diameter + 0.0004);
 653                 }
 654         }
 655
 656         /**
 657          * Show motors that fit the mount.
 658          */
 659         private class MotorRowFilterExact extends MotorRowFilter {
 660                 @Override
 661                 public boolean filterByDiameter(Motor m) {
 662                         return ((m.getDiameter() <= diameter + 0.0004) &&
 663                                         (m.getDiameter() >= diameter - 0.0015));
 664                 }
 665         }
 666
 667
 668         private static Comparator<String> numericalComparator = null;
 669         private static Comparator<String> getNumericalComparator() {
 670                 if (numericalComparator == null)
 671                         numericalComparator = new NumericalComparator();
 672                 return numericalComparator;
 673         }
 674
 675         private static class NumericalComparator implements Comparator<String> {
 676                 private Pattern pattern =
 677                         Pattern.compile("^\\s*([0-9]*[.,][0-9]+|[0-9]+[.,]?[0-9]*).*?$");
 678                 private Collator collator = null;
 679                 @Override
 680                 public int compare(String s1, String s2) {
 681                         Matcher m1, m2;
 682
 683                         m1 = pattern.matcher(s1);
 684                         m2 = pattern.matcher(s2);
 685                         if (m1.find() && m2.find()) {
 686                                 double d1 = Double.parseDouble(m1.group(1));
 687                                 double d2 = Double.parseDouble(m2.group(1));
 688
 689                                 return (int)((d1-d2)*1000);
 690                         }
 691
 692                         if (collator == null)
 693                                 collator = Collator.getInstance(Locale.US);
 694                         return collator.compare(s1, s2);
 695                 }
 696         }
 697
 698 }