git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/unit/UnitGroup.java

   1 package net.sf.openrocket.unit;
   2
   3 import static net.sf.openrocket.util.Chars.*;
   4 import static net.sf.openrocket.util.MathUtil.pow2;
   5
   6 import java.util.ArrayList;
   7 import java.util.Collections;
   8 import java.util.HashMap;
   9 import java.util.Map;
  10 import java.util.regex.Matcher;
  11 import java.util.regex.Pattern;
  12
  13 import net.sf.openrocket.rocketcomponent.Configuration;
  14 import net.sf.openrocket.rocketcomponent.Rocket;
  15
  16
  17 /**
  18  * A group of units (eg. length, mass etc.).  Contains a list of different units of a same
  19  * quantity.
  20  *
  21  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  22  */
  23
  24 public class UnitGroup {
  25
  26         public static final UnitGroup UNITS_NONE;
  27
  28         public static final UnitGroup UNITS_MOTOR_DIMENSIONS;
  29         public static final UnitGroup UNITS_LENGTH;
  30         public static final UnitGroup UNITS_DISTANCE;
  31
  32         public static final UnitGroup UNITS_AREA;
  33         public static final UnitGroup UNITS_STABILITY;
  34         public static final UnitGroup UNITS_VELOCITY;
  35         public static final UnitGroup UNITS_ACCELERATION;
  36         public static final UnitGroup UNITS_MASS;
  37         public static final UnitGroup UNITS_ANGLE;
  38         public static final UnitGroup UNITS_DENSITY_BULK;
  39         public static final UnitGroup UNITS_DENSITY_SURFACE;
  40         public static final UnitGroup UNITS_DENSITY_LINE;
  41         public static final UnitGroup UNITS_FORCE;
  42         public static final UnitGroup UNITS_IMPULSE;
  43
  44         /** Time in the order of less than a second (time step etc). */
  45         public static final UnitGroup UNITS_TIME_STEP;
  46
  47         /** Time in the order of seconds (motor delay etc). */
  48         public static final UnitGroup UNITS_SHORT_TIME;
  49
  50         /** Time in the order of the flight time of a rocket. */
  51         public static final UnitGroup UNITS_FLIGHT_TIME;
  52         public static final UnitGroup UNITS_ROLL;
  53         public static final UnitGroup UNITS_TEMPERATURE;
  54         public static final UnitGroup UNITS_PRESSURE;
  55         public static final UnitGroup UNITS_RELATIVE;
  56         public static final UnitGroup UNITS_ROUGHNESS;
  57
  58         public static final UnitGroup UNITS_COEFFICIENT;
  59
  60
  61         public static final Map<String, UnitGroup> UNITS;
  62
  63
  64         /*
  65          * Note:  Units may not use HTML tags.
  66          */
  67         static {
  68                 UNITS_NONE = new UnitGroup();
  69                 UNITS_NONE.addUnit(Unit.NOUNIT2);
  70
  71                 UNITS_LENGTH = new UnitGroup();
  72                 UNITS_LENGTH.addUnit(new GeneralUnit(0.001,"mm"));
  73                 UNITS_LENGTH.addUnit(new GeneralUnit(0.01,"cm"));
  74                 UNITS_LENGTH.addUnit(new GeneralUnit(1,"m"));
  75                 UNITS_LENGTH.addUnit(new GeneralUnit(0.0254,"in"));
  76                 UNITS_LENGTH.addUnit(new GeneralUnit(0.3048,"ft"));
  77                 UNITS_LENGTH.setDefaultUnit(1);
  78
  79                 UNITS_MOTOR_DIMENSIONS = new UnitGroup();
  80                 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.001,"mm"));
  81                 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.01,"cm"));
  82                 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.0254,"in"));
  83                 UNITS_MOTOR_DIMENSIONS.setDefaultUnit(0);
  84
  85                 UNITS_DISTANCE = new UnitGroup();
  86                 UNITS_DISTANCE.addUnit(new GeneralUnit(1,"m"));
  87                 UNITS_DISTANCE.addUnit(new GeneralUnit(1000,"km"));
  88                 UNITS_DISTANCE.addUnit(new GeneralUnit(0.3048,"ft"));
  89                 UNITS_DISTANCE.addUnit(new GeneralUnit(0.9144,"yd"));
  90                 UNITS_DISTANCE.addUnit(new GeneralUnit(1609.344,"mi"));
  91
  92                 UNITS_AREA = new UnitGroup();
  93                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.001),"mm" + SQUARED));
  94                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.01),"cm" + SQUARED));
  95                 UNITS_AREA.addUnit(new GeneralUnit(1,"m" + SQUARED));
  96                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.0254),"in" + SQUARED));
  97                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.3048),"ft" + SQUARED));
  98                 UNITS_AREA.setDefaultUnit(1);
  99
 100
 101                 UNITS_STABILITY = new UnitGroup();
 102                 UNITS_STABILITY.addUnit(new GeneralUnit(0.001,"mm"));
 103                 UNITS_STABILITY.addUnit(new GeneralUnit(0.01,"cm"));
 104                 UNITS_STABILITY.addUnit(new GeneralUnit(0.0254,"in"));
 105                 UNITS_STABILITY.addUnit(new CaliberUnit((Rocket)null));
 106                 UNITS_STABILITY.setDefaultUnit(3);
 107
 108                 UNITS_VELOCITY = new UnitGroup();
 109                 UNITS_VELOCITY.addUnit(new GeneralUnit(1, "m/s"));
 110                 UNITS_VELOCITY.addUnit(new GeneralUnit(1/3.6, "km/h"));
 111                 UNITS_VELOCITY.addUnit(new GeneralUnit(0.3048, "ft/s"));
 112                 UNITS_VELOCITY.addUnit(new GeneralUnit(0.44704, "mph"));
 113
 114                 UNITS_ACCELERATION = new UnitGroup();
 115                 UNITS_ACCELERATION.addUnit(new GeneralUnit(1, "m/s" + SQUARED));
 116                 UNITS_ACCELERATION.addUnit(new GeneralUnit(0.3048, "ft/s" + SQUARED));
 117
 118
 119                 UNITS_MASS = new UnitGroup();
 120                 UNITS_MASS.addUnit(new GeneralUnit(0.001,"g"));
 121                 UNITS_MASS.addUnit(new GeneralUnit(1,"kg"));
 122                 UNITS_MASS.addUnit(new GeneralUnit(0.0283495231,"oz"));
 123                 UNITS_MASS.addUnit(new GeneralUnit(0.45359237,"lb"));
 124
 125                 UNITS_ANGLE = new UnitGroup();
 126                 UNITS_ANGLE.addUnit(new DegreeUnit());
 127                 UNITS_ANGLE.addUnit(new FixedPrecisionUnit("rad",0.01));
 128
 129                 UNITS_DENSITY_BULK = new UnitGroup();
 130                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1000,"g/cm" + CUBED));
 131                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1,"kg/m" + CUBED));
 132                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1729.99404,"oz/in" + CUBED));
 133                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(16.0184634,"lb/ft" + CUBED));
 134
 135                 UNITS_DENSITY_SURFACE = new UnitGroup();
 136                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(10,"g/cm" + SQUARED));
 137                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.001,"g/m" + SQUARED));
 138                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(1,"kg/m" + SQUARED));
 139                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(43.9418487,"oz/in" + SQUARED));
 140                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.305151727,"oz/ft" + SQUARED));
 141                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(4.88242764,"lb/ft" + SQUARED));
 142                 UNITS_DENSITY_SURFACE.setDefaultUnit(1);
 143
 144                 UNITS_DENSITY_LINE = new UnitGroup();
 145                 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.001,"g/m"));
 146                 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(1,"kg/m"));
 147                 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.0930102465,"oz/ft"));
 148
 149                 UNITS_FORCE = new UnitGroup();
 150                 UNITS_FORCE.addUnit(new GeneralUnit(1,"N"));
 151                 UNITS_FORCE.addUnit(new GeneralUnit(4.44822162,"lbf"));
 152                 UNITS_FORCE.addUnit(new GeneralUnit(9.80665,"kgf"));
 153
 154                 UNITS_IMPULSE = new UnitGroup();
 155                 UNITS_IMPULSE.addUnit(new GeneralUnit(1,"Ns"));
 156                 UNITS_IMPULSE.addUnit(new GeneralUnit(4.44822162, "lbf"+DOT+"s"));
 157
 158                 UNITS_TIME_STEP = new UnitGroup();
 159                 UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("ms", 1, 0.001));
 160                 UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("s", 0.01));
 161                 UNITS_TIME_STEP.setDefaultUnit(1);
 162
 163                 UNITS_SHORT_TIME = new UnitGroup();
 164                 UNITS_SHORT_TIME.addUnit(new GeneralUnit(1,"s"));
 165
 166                 UNITS_FLIGHT_TIME = new UnitGroup();
 167                 UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(1,"s"));
 168                 UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(60,"min"));
 169
 170                 UNITS_ROLL = new UnitGroup();
 171                 UNITS_ROLL.addUnit(new GeneralUnit(1, "rad/s"));
 172                 UNITS_ROLL.addUnit(new GeneralUnit(2*Math.PI, "r/s"));
 173                 UNITS_ROLL.addUnit(new GeneralUnit(2*Math.PI/60, "rpm"));
 174                 UNITS_ROLL.setDefaultUnit(1);
 175
 176                 UNITS_TEMPERATURE = new UnitGroup();
 177                 UNITS_TEMPERATURE.addUnit(new FixedPrecisionUnit("K", 1));
 178                 UNITS_TEMPERATURE.addUnit(new TemperatureUnit(1, 273.15, DEGREE+"C"));
 179                 UNITS_TEMPERATURE.addUnit(new TemperatureUnit(5.0/9.0, 459.67, DEGREE+"F"));
 180                 UNITS_TEMPERATURE.setDefaultUnit(1);
 181
 182                 UNITS_PRESSURE = new UnitGroup();
 183                 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("mbar", 1, 1.0e2));
 184                 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("bar", 0.001, 1.0e5));
 185                 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("atm", 0.001, 1.01325e5));
 186                 UNITS_PRESSURE.addUnit(new GeneralUnit(101325.0/760.0, "mmHg"));
 187                 UNITS_PRESSURE.addUnit(new GeneralUnit(3386.389, "inHg"));
 188                 UNITS_PRESSURE.addUnit(new GeneralUnit(6894.75729, "psi"));
 189                 UNITS_PRESSURE.addUnit(new GeneralUnit(1, "Pa"));
 190
 191                 UNITS_RELATIVE = new UnitGroup();
 192                 UNITS_RELATIVE.addUnit(new FixedPrecisionUnit(""+ZWSP, 0.01, 1.0));
 193                 UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("%", 1, 0.01));
 194                 UNITS_RELATIVE.addUnit(new FixedPrecisionUnit(""+PERMILLE, 1, 0.001));
 195                 UNITS_RELATIVE.setDefaultUnit(1);
 196
 197
 198                 UNITS_ROUGHNESS = new UnitGroup();
 199                 UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.000001, MICRO+"m"));
 200                 UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.0000254, "mil"));
 201
 202
 203                 UNITS_COEFFICIENT = new UnitGroup();
 204                 UNITS_COEFFICIENT.addUnit(new FixedPrecisionUnit(""+ZWSP, 0.01));  // zero-width space
 205
 206
 207                 HashMap<String,UnitGroup> map = new HashMap<String,UnitGroup>();
 208                 map.put("NONE", UNITS_NONE);
 209                 map.put("LENGTH", UNITS_LENGTH);
 210                 map.put("MOTOR_DIMENSIONS", UNITS_MOTOR_DIMENSIONS);
 211                 map.put("DISTANCE", UNITS_DISTANCE);
 212                 map.put("VELOCITY", UNITS_VELOCITY);
 213                 map.put("ACCELERATION", UNITS_ACCELERATION);
 214                 map.put("AREA", UNITS_AREA);
 215                 map.put("STABILITY", UNITS_STABILITY);
 216                 map.put("MASS", UNITS_MASS);
 217                 map.put("ANGLE", UNITS_ANGLE);
 218                 map.put("DENSITY_BULK", UNITS_DENSITY_BULK);
 219                 map.put("DENSITY_SURFACE", UNITS_DENSITY_SURFACE);
 220                 map.put("DENSITY_LINE", UNITS_DENSITY_LINE);
 221                 map.put("FORCE", UNITS_FORCE);
 222                 map.put("IMPULSE", UNITS_IMPULSE);
 223                 map.put("TIME_STEP", UNITS_TIME_STEP);
 224                 map.put("SHORT_TIME", UNITS_SHORT_TIME);
 225                 map.put("FLIGHT_TIME", UNITS_FLIGHT_TIME);
 226                 map.put("ROLL", UNITS_ROLL);
 227                 map.put("TEMPERATURE", UNITS_TEMPERATURE);
 228                 map.put("PRESSURE", UNITS_PRESSURE);
 229                 map.put("RELATIVE", UNITS_RELATIVE);
 230                 map.put("ROUGHNESS", UNITS_ROUGHNESS);
 231                 map.put("COEFFICIENT", UNITS_COEFFICIENT);
 232
 233                 UNITS = Collections.unmodifiableMap(map);
 234         }
 235
 236         public static void setDefaultMetricUnits() {
 237                 UNITS_LENGTH.setDefaultUnit("cm");
 238                 UNITS_MOTOR_DIMENSIONS.setDefaultUnit("mm");
 239                 UNITS_DISTANCE.setDefaultUnit("m");
 240                 UNITS_AREA.setDefaultUnit("cm"+SQUARED);
 241                 UNITS_STABILITY.setDefaultUnit("cal");
 242                 UNITS_VELOCITY.setDefaultUnit("m/s");
 243                 UNITS_ACCELERATION.setDefaultUnit("m/s"+SQUARED);
 244                 UNITS_MASS.setDefaultUnit("g");
 245                 UNITS_ANGLE.setDefaultUnit(""+DEGREE);
 246                 UNITS_DENSITY_BULK.setDefaultUnit("g/cm"+CUBED);
 247                 UNITS_DENSITY_SURFACE.setDefaultUnit("g/m"+SQUARED);
 248                 UNITS_DENSITY_LINE.setDefaultUnit("g/m");
 249                 UNITS_FORCE.setDefaultUnit("N");
 250                 UNITS_IMPULSE.setDefaultUnit("Ns");
 251                 UNITS_TIME_STEP.setDefaultUnit("s");
 252                 UNITS_FLIGHT_TIME.setDefaultUnit("s");
 253                 UNITS_ROLL.setDefaultUnit("r/s");
 254                 UNITS_TEMPERATURE.setDefaultUnit(DEGREE+"C");
 255                 UNITS_PRESSURE.setDefaultUnit("mbar");
 256                 UNITS_RELATIVE.setDefaultUnit("%");
 257                 UNITS_ROUGHNESS.setDefaultUnit(MICRO+"m");
 258         }
 259
 260         public static void setDefaultImperialUnits() {
 261                 UNITS_LENGTH.setDefaultUnit("in");
 262                 UNITS_MOTOR_DIMENSIONS.setDefaultUnit("in");
 263                 UNITS_DISTANCE.setDefaultUnit("ft");
 264                 UNITS_AREA.setDefaultUnit("in"+SQUARED);
 265                 UNITS_STABILITY.setDefaultUnit("cal");
 266                 UNITS_VELOCITY.setDefaultUnit("ft/s");
 267                 UNITS_ACCELERATION.setDefaultUnit("ft/s"+SQUARED);
 268                 UNITS_MASS.setDefaultUnit("oz");
 269                 UNITS_ANGLE.setDefaultUnit(""+DEGREE);
 270                 UNITS_DENSITY_BULK.setDefaultUnit("oz/in"+CUBED);
 271                 UNITS_DENSITY_SURFACE.setDefaultUnit("oz/ft"+SQUARED);
 272                 UNITS_DENSITY_LINE.setDefaultUnit("oz/ft");
 273                 UNITS_FORCE.setDefaultUnit("N");
 274                 UNITS_IMPULSE.setDefaultUnit("Ns");
 275                 UNITS_TIME_STEP.setDefaultUnit("s");
 276                 UNITS_FLIGHT_TIME.setDefaultUnit("s");
 277                 UNITS_ROLL.setDefaultUnit("r/s");
 278                 UNITS_TEMPERATURE.setDefaultUnit(DEGREE+"F");
 279                 UNITS_PRESSURE.setDefaultUnit("mbar");
 280                 UNITS_RELATIVE.setDefaultUnit("%");
 281                 UNITS_ROUGHNESS.setDefaultUnit("mil");
 282         }
 283
 284
 285
 286         public static UnitGroup stabilityUnits(Rocket rocket) {
 287                 return new StabilityUnitGroup(rocket);
 288         }
 289
 290
 291         public static UnitGroup stabilityUnits(Configuration config) {
 292                 return new StabilityUnitGroup(config);
 293         }
 294
 295
 296         //////////////////////////////////////////////////////
 297
 298
 299         private ArrayList<Unit> units = new ArrayList<Unit>();
 300         private int defaultUnit = 0;
 301
 302         public int getUnitCount() {
 303                 return units.size();
 304         }
 305
 306         public Unit getDefaultUnit() {
 307                 return units.get(defaultUnit);
 308         }
 309
 310         public int getDefaultUnitIndex() {
 311                 return defaultUnit;
 312         }
 313
 314         public void setDefaultUnit(int n) {
 315                 if (n<0 || n>=units.size()) {
 316                         throw new IllegalArgumentException("index out of range: "+n);
 317                 }
 318                 defaultUnit = n;
 319         }
 320
 321
 322
 323         /**
 324          * Find a unit by approximate unit name.  Only letters and (ordinary) numbers are
 325          * considered in the matching.  This method is mainly means for testing, allowing
 326          * a simple means to obtain a particular unit.
 327          *
 328          * @param str   the unit name.
 329          * @return              the corresponding unit, or <code>null</code> if not found.
 330          */
 331         public Unit findApproximate(String str) {
 332                 str = str.replaceAll("\\W", "").trim();
 333                 for (Unit u: units) {
 334                         String name = u.getUnit().replaceAll("\\W", "").trim();
 335                         if (str.equalsIgnoreCase(name))
 336                                 return u;
 337                 }
 338                 return null;
 339         }
 340
 341         /**
 342          * Set the default unit based on the unit name.  Throws an exception if a
 343          * unit with the provided name is not available.
 344          *
 345          * @param   name        the unit name.
 346          * @throws  IllegalArgumentException    if the corresponding unit is not found in the group.
 347          */
 348         public void setDefaultUnit(String name) throws IllegalArgumentException {
 349                 for (int i=0; i < units.size(); i++) {
 350                         if (units.get(i).getUnit().equals(name)) {
 351                                 setDefaultUnit(i);
 352                                 return;
 353                         }
 354                 }
 355                 throw new IllegalArgumentException("name="+name);
 356         }
 357
 358
 359         public Unit getUnit(int n) {
 360                 return units.get(n);
 361         }
 362
 363         public int getUnitIndex(Unit u) {
 364                 return units.indexOf(u);
 365         }
 366
 367         public void addUnit(Unit u) {
 368                 units.add(u);
 369         }
 370
 371         public void addUnit(int n, Unit u) {
 372                 units.add(n,u);
 373         }
 374
 375         public void removeUnit(int n) {
 376                 units.remove(n);
 377         }
 378
 379         public boolean contains(Unit u) {
 380                 return units.contains(u);
 381         }
 382
 383         public Unit[] getUnits() {
 384                 return units.toArray(new Unit[0]);
 385         }
 386
 387
 388         /**
 389          * Return the value formatted by the default unit of this group.
 390          * It is the same as calling <code>getDefaultUnit().toString(value)</code>.
 391          *
 392          * @param value         the SI value to format.
 393          * @return                      the formatted string.
 394          * @see                         Unit#toString(double)
 395          */
 396         public String toString(double value) {
 397                 return this.getDefaultUnit().toString(value);
 398         }
 399
 400
 401         /**
 402          * Return the value formatted by the default unit of this group including the unit.
 403          * It is the same as calling <code>getDefaultUnit().toStringUnit(value)</code>.
 404          *
 405          * @param value         the SI value to format.
 406          * @return                      the formatted string.
 407          * @see                         Unit#toStringUnit(double)
 408          */
 409         public String toStringUnit(double value) {
 410                 return this.getDefaultUnit().toStringUnit(value);
 411         }
 412
 413
 414
 415
 416
 417         /**
 418          * Creates a new Value object with the specified value and the default unit of this group.
 419          *
 420          * @param value the value to set.
 421          * @return              a new Value object.
 422          */
 423         public Value toValue(double value) {
 424                 return this.getDefaultUnit().toValue(value);
 425         }
 426
 427
 428
 429
 430         private static final Pattern STRING_PATTERN = Pattern.compile("^\\s*([0-9.,-]+)(.*?)$");
 431         /**
 432          * Converts a string into an SI value.  If the string has one of the units in this
 433          * group appended to it, that unit will be used in conversion.  Otherwise the default
 434          * unit will be used.  If an unknown unit is specified or the value does not parse
 435          * with <code>Double.parseDouble</code> then a <code>NumberFormatException</code>
 436          * is thrown.
 437          * <p>
 438          * This method is applicable only for simple units without e.g. powers.
 439          *
 440          * @param str   the string to parse.
 441          * @return              the SI value.
 442          * @throws NumberFormatException   if the string cannot be parsed.
 443          */
 444         public double fromString(String str) {
 445                 Matcher matcher = STRING_PATTERN.matcher(str);
 446
 447                 if (!matcher.matches()) {
 448                         throw new NumberFormatException("string did not match required pattern");
 449                 }
 450
 451                 double value = Double.parseDouble(matcher.group(1));
 452                 String unit = matcher.group(2).trim();
 453
 454                 if (unit.equals("")) {
 455                         value = this.getDefaultUnit().fromUnit(value);
 456                 } else {
 457                         int i;
 458                         for (i=0; i < units.size(); i++) {
 459                                 Unit u = units.get(i);
 460                                 if (unit.equalsIgnoreCase(u.getUnit())) {
 461                                         value = u.fromUnit(value);
 462                                         break;
 463                                 }
 464                         }
 465                         if (i >= units.size()) {
 466                                 throw new NumberFormatException("unknown unit "+unit);
 467                         }
 468                 }
 469
 470                 return value;
 471         }
 472
 473
 474         ///////////////////////////
 475
 476
 477         /**
 478          * A private class that switches the CaliberUnit to a rocket-specific CaliberUnit.
 479          * All other methods are passed through to UNITS_STABILITY.
 480          */
 481         private static class StabilityUnitGroup extends UnitGroup {
 482
 483                 private final CaliberUnit caliberUnit;
 484
 485
 486                 public StabilityUnitGroup(Rocket rocket) {
 487                         caliberUnit = new CaliberUnit(rocket);
 488                 }
 489
 490                 public StabilityUnitGroup(Configuration config) {
 491                         caliberUnit = new CaliberUnit(config);
 492                 }
 493
 494
 495                 ////  Modify CaliberUnit to use local variable
 496
 497                 @Override
 498                 public Unit getDefaultUnit() {
 499                         return getUnit(UNITS_STABILITY.getDefaultUnitIndex());
 500                 }
 501
 502                 @Override
 503                 public Unit getUnit(int n) {
 504                         Unit u = UNITS_STABILITY.getUnit(n);
 505                         if (u instanceof CaliberUnit) {
 506                                 return caliberUnit;
 507                         }
 508                         return u;
 509                 }
 510
 511                 @Override
 512                 public int getUnitIndex(Unit u) {
 513                         if (u instanceof CaliberUnit) {
 514                                 for (int i=0; i < UNITS_STABILITY.getUnitCount(); i++) {
 515                                         if (UNITS_STABILITY.getUnit(i) instanceof CaliberUnit)
 516                                                 return i;
 517                                 }
 518                         }
 519                         return UNITS_STABILITY.getUnitIndex(u);
 520                 }
 521
 522
 523
 524                 ////  Pass on to UNITS_STABILITY
 525
 526                 @Override
 527                 public int getDefaultUnitIndex() {
 528                         return UNITS_STABILITY.getDefaultUnitIndex();
 529                 }
 530
 531                 @Override
 532                 public void setDefaultUnit(int n) {
 533                         UNITS_STABILITY.setDefaultUnit(n);
 534                 }
 535
 536                 @Override
 537                 public int getUnitCount() {
 538                         return UNITS_STABILITY.getUnitCount();
 539                 }
 540
 541
 542                 ////  Unsupported methods
 543
 544                 @Override
 545                 public void addUnit(int n, Unit u) {
 546                         throw new UnsupportedOperationException("StabilityUnitGroup must not be modified");
 547                 }
 548
 549                 @Override
 550                 public void addUnit(Unit u) {
 551                         throw new UnsupportedOperationException("StabilityUnitGroup must not be modified");
 552                 }
 553
 554                 @Override
 555                 public void removeUnit(int n) {
 556                         throw new UnsupportedOperationException("StabilityUnitGroup must not be modified");
 557                 }
 558         }
 559 }