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         /**
  35          * This unit group contains only the caliber unit that never scales the originating "SI" value.
  36          * It can be used in cases where the originating value is already in calibers to obtains the correct unit.
  37          */
  38         public static final UnitGroup UNITS_STABILITY_CALIBERS;
  39         public static final UnitGroup UNITS_VELOCITY;
  40         public static final UnitGroup UNITS_ACCELERATION;
  41         public static final UnitGroup UNITS_MASS;
  42         public static final UnitGroup UNITS_INERTIA;
  43         public static final UnitGroup UNITS_ANGLE;
  44         public static final UnitGroup UNITS_DENSITY_BULK;
  45         public static final UnitGroup UNITS_DENSITY_SURFACE;
  46         public static final UnitGroup UNITS_DENSITY_LINE;
  47         public static final UnitGroup UNITS_FORCE;
  48         public static final UnitGroup UNITS_IMPULSE;
  49
  50         /** Time in the order of less than a second (time step etc). */
  51         public static final UnitGroup UNITS_TIME_STEP;
  52
  53         /** Time in the order of seconds (motor delay etc). */
  54         public static final UnitGroup UNITS_SHORT_TIME;
  55
  56         /** Time in the order of the flight time of a rocket. */
  57         public static final UnitGroup UNITS_FLIGHT_TIME;
  58         public static final UnitGroup UNITS_ROLL;
  59         public static final UnitGroup UNITS_TEMPERATURE;
  60         public static final UnitGroup UNITS_PRESSURE;
  61         public static final UnitGroup UNITS_RELATIVE;
  62         public static final UnitGroup UNITS_ROUGHNESS;
  63
  64         public static final UnitGroup UNITS_COEFFICIENT;
  65
  66         //      public static final UnitGroup UNITS_FREQUENCY;
  67
  68
  69         public static final Map<String, UnitGroup> UNITS;
  70
  71
  72         /*
  73          * Note:  Units may not use HTML tags.
  74          *
  75          * The scaling value "X" is obtained by "one of this unit is X of SI units"
  76          * Type into Google for example:  "1 in^2 in m^2"
  77          */
  78         static {
  79                 UNITS_NONE = new UnitGroup();
  80                 UNITS_NONE.addUnit(Unit.NOUNIT2);
  81
  82                 UNITS_LENGTH = new UnitGroup();
  83                 UNITS_LENGTH.addUnit(new GeneralUnit(0.001, "mm"));
  84                 UNITS_LENGTH.addUnit(new GeneralUnit(0.01, "cm"));
  85                 UNITS_LENGTH.addUnit(new GeneralUnit(1, "m"));
  86                 UNITS_LENGTH.addUnit(new GeneralUnit(0.0254, "in"));
  87                 UNITS_LENGTH.addUnit(new GeneralUnit(0.3048, "ft"));
  88                 UNITS_LENGTH.setDefaultUnit(1);
  89
  90                 UNITS_MOTOR_DIMENSIONS = new UnitGroup();
  91                 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.001, "mm"));
  92                 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.01, "cm"));
  93                 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.0254, "in"));
  94                 UNITS_MOTOR_DIMENSIONS.setDefaultUnit(0);
  95
  96                 UNITS_DISTANCE = new UnitGroup();
  97                 UNITS_DISTANCE.addUnit(new GeneralUnit(1, "m"));
  98                 UNITS_DISTANCE.addUnit(new GeneralUnit(1000, "km"));
  99                 UNITS_DISTANCE.addUnit(new GeneralUnit(0.3048, "ft"));
 100                 UNITS_DISTANCE.addUnit(new GeneralUnit(0.9144, "yd"));
 101                 UNITS_DISTANCE.addUnit(new GeneralUnit(1609.344, "mi"));
 102                 UNITS_DISTANCE.addUnit(new GeneralUnit(1852, "nmi"));
 103
 104                 UNITS_AREA = new UnitGroup();
 105                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.001), "mm" + SQUARED));
 106                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.01), "cm" + SQUARED));
 107                 UNITS_AREA.addUnit(new GeneralUnit(1, "m" + SQUARED));
 108                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.0254), "in" + SQUARED));
 109                 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.3048), "ft" + SQUARED));
 110                 UNITS_AREA.setDefaultUnit(1);
 111
 112
 113                 UNITS_STABILITY = new UnitGroup();
 114                 UNITS_STABILITY.addUnit(new GeneralUnit(0.001, "mm"));
 115                 UNITS_STABILITY.addUnit(new GeneralUnit(0.01, "cm"));
 116                 UNITS_STABILITY.addUnit(new GeneralUnit(0.0254, "in"));
 117                 UNITS_STABILITY.addUnit(new CaliberUnit((Rocket) null));
 118                 UNITS_STABILITY.setDefaultUnit(3);
 119
 120                 UNITS_STABILITY_CALIBERS = new UnitGroup();
 121                 UNITS_STABILITY_CALIBERS.addUnit(new GeneralUnit(1, "cal"));
 122
 123
 124                 UNITS_VELOCITY = new UnitGroup();
 125                 UNITS_VELOCITY.addUnit(new GeneralUnit(1, "m/s"));
 126                 UNITS_VELOCITY.addUnit(new GeneralUnit(1 / 3.6, "km/h"));
 127                 UNITS_VELOCITY.addUnit(new GeneralUnit(0.3048, "ft/s"));
 128                 UNITS_VELOCITY.addUnit(new GeneralUnit(0.44704, "mph"));
 129
 130                 UNITS_ACCELERATION = new UnitGroup();
 131                 UNITS_ACCELERATION.addUnit(new GeneralUnit(1, "m/s" + SQUARED));
 132                 UNITS_ACCELERATION.addUnit(new GeneralUnit(0.3048, "ft/s" + SQUARED));
 133
 134                 UNITS_MASS = new UnitGroup();
 135                 UNITS_MASS.addUnit(new GeneralUnit(0.001, "g"));
 136                 UNITS_MASS.addUnit(new GeneralUnit(1, "kg"));
 137                 UNITS_MASS.addUnit(new GeneralUnit(0.0283495231, "oz"));
 138                 UNITS_MASS.addUnit(new GeneralUnit(0.45359237, "lb"));
 139
 140                 UNITS_INERTIA = new UnitGroup();
 141                 UNITS_INERTIA.addUnit(new GeneralUnit(0.0001, "kg" + DOT + "cm" + SQUARED));
 142                 UNITS_INERTIA.addUnit(new GeneralUnit(1, "kg" + DOT + "m" + SQUARED));
 143                 UNITS_INERTIA.addUnit(new GeneralUnit(1.82899783e-5, "oz" + DOT + "in" + SQUARED));
 144                 UNITS_INERTIA.addUnit(new GeneralUnit(0.000292639653, "lb" + DOT + "in" + SQUARED));
 145                 UNITS_INERTIA.addUnit(new GeneralUnit(0.0421401101, "lb" + DOT + "ft" + SQUARED));
 146                 UNITS_INERTIA.addUnit(new GeneralUnit(1.35581795, "lbf" + DOT + "ft" + DOT + "s" + SQUARED));
 147                 UNITS_INERTIA.setDefaultUnit(1);
 148
 149                 UNITS_ANGLE = new UnitGroup();
 150                 UNITS_ANGLE.addUnit(new DegreeUnit());
 151                 UNITS_ANGLE.addUnit(new FixedPrecisionUnit("rad", 0.01));
 152                 UNITS_ANGLE.addUnit(new GeneralUnit(1.0/3437.74677078, "arcmin"));
 153
 154                 UNITS_DENSITY_BULK = new UnitGroup();
 155                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1000, "g/cm" + CUBED));
 156                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1, "kg/m" + CUBED));
 157                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1729.99404, "oz/in" + CUBED));
 158                 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(16.0184634, "lb/ft" + CUBED));
 159
 160                 UNITS_DENSITY_SURFACE = new UnitGroup();
 161                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(10, "g/cm" + SQUARED));
 162                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.001, "g/m" + SQUARED));
 163                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(1, "kg/m" + SQUARED));
 164                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(43.9418487, "oz/in" + SQUARED));
 165                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.305151727, "oz/ft" + SQUARED));
 166                 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(4.88242764, "lb/ft" + SQUARED));
 167                 UNITS_DENSITY_SURFACE.setDefaultUnit(1);
 168
 169                 UNITS_DENSITY_LINE = new UnitGroup();
 170                 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.001, "g/m"));
 171                 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(1, "kg/m"));
 172                 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.0930102465, "oz/ft"));
 173
 174                 UNITS_FORCE = new UnitGroup();
 175                 UNITS_FORCE.addUnit(new GeneralUnit(1, "N"));
 176                 UNITS_FORCE.addUnit(new GeneralUnit(4.44822162, "lbf"));
 177                 UNITS_FORCE.addUnit(new GeneralUnit(9.80665, "kgf"));
 178
 179                 UNITS_IMPULSE = new UnitGroup();
 180                 UNITS_IMPULSE.addUnit(new GeneralUnit(1, "Ns"));
 181                 UNITS_IMPULSE.addUnit(new GeneralUnit(4.44822162, "lbf" + DOT + "s"));
 182
 183                 UNITS_TIME_STEP = new UnitGroup();
 184                 UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("ms", 1, 0.001));
 185                 UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("s", 0.01));
 186                 UNITS_TIME_STEP.setDefaultUnit(1);
 187
 188                 UNITS_SHORT_TIME = new UnitGroup();
 189                 UNITS_SHORT_TIME.addUnit(new GeneralUnit(1, "s"));
 190
 191                 UNITS_FLIGHT_TIME = new UnitGroup();
 192                 UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(1, "s"));
 193                 UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(60, "min"));
 194
 195                 UNITS_ROLL = new UnitGroup();
 196                 UNITS_ROLL.addUnit(new GeneralUnit(1, "rad/s"));
 197                 UNITS_ROLL.addUnit(new GeneralUnit(2 * Math.PI, "r/s"));
 198                 UNITS_ROLL.addUnit(new GeneralUnit(2 * Math.PI / 60, "rpm"));
 199                 UNITS_ROLL.setDefaultUnit(1);
 200
 201                 UNITS_TEMPERATURE = new UnitGroup();
 202                 UNITS_TEMPERATURE.addUnit(new FixedPrecisionUnit("K", 1));
 203                 UNITS_TEMPERATURE.addUnit(new TemperatureUnit(1, 273.15, DEGREE + "C"));
 204                 UNITS_TEMPERATURE.addUnit(new TemperatureUnit(5.0 / 9.0, 459.67, DEGREE + "F"));
 205                 UNITS_TEMPERATURE.setDefaultUnit(1);
 206
 207                 UNITS_PRESSURE = new UnitGroup();
 208                 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("mbar", 1, 1.0e2));
 209                 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("bar", 0.001, 1.0e5));
 210                 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("atm", 0.001, 1.01325e5));
 211                 UNITS_PRESSURE.addUnit(new GeneralUnit(101325.0 / 760.0, "mmHg"));
 212                 UNITS_PRESSURE.addUnit(new GeneralUnit(3386.389, "inHg"));
 213                 UNITS_PRESSURE.addUnit(new GeneralUnit(6894.75729, "psi"));
 214                 UNITS_PRESSURE.addUnit(new GeneralUnit(1, "Pa"));
 215
 216                 UNITS_RELATIVE = new UnitGroup();
 217                 UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.01, 1.0));
 218                 UNITS_RELATIVE.addUnit(new GeneralUnit(0.01, "%"));
 219                 UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + PERMILLE, 1, 0.001));
 220                 //              UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.01, 1.0));
 221                 //              UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("%", 1, 0.01));
 222                 //              UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + PERMILLE, 1, 0.001));
 223                 UNITS_RELATIVE.setDefaultUnit(1);
 224
 225
 226                 UNITS_ROUGHNESS = new UnitGroup();
 227                 UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.000001, MICRO + "m"));
 228                 UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.0000254, "mil"));
 229
 230
 231                 UNITS_COEFFICIENT = new UnitGroup();
 232                 UNITS_COEFFICIENT.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.01)); // zero-width space
 233
 234
 235                 // This is not used by OpenRocket, and not extensively tested:
 236                 //              UNITS_FREQUENCY = new UnitGroup();
 237                 //              UNITS_FREQUENCY.addUnit(new GeneralUnit(1, "s"));
 238                 //              UNITS_FREQUENCY.addUnit(new GeneralUnit(0.001, "ms"));
 239                 //              UNITS_FREQUENCY.addUnit(new GeneralUnit(0.000001, MICRO + "s"));
 240                 //              UNITS_FREQUENCY.addUnit(new FrequencyUnit(1, "Hz"));
 241                 //              UNITS_FREQUENCY.addUnit(new FrequencyUnit(1000, "kHz"));
 242                 //              UNITS_FREQUENCY.setDefaultUnit(3);
 243
 244
 245                 HashMap<String, UnitGroup> map = new HashMap<String, UnitGroup>();
 246                 map.put("NONE", UNITS_NONE);
 247                 map.put("LENGTH", UNITS_LENGTH);
 248                 map.put("MOTOR_DIMENSIONS", UNITS_MOTOR_DIMENSIONS);
 249                 map.put("DISTANCE", UNITS_DISTANCE);
 250                 map.put("VELOCITY", UNITS_VELOCITY);
 251                 map.put("ACCELERATION", UNITS_ACCELERATION);
 252                 map.put("AREA", UNITS_AREA);
 253                 map.put("STABILITY", UNITS_STABILITY);
 254                 map.put("MASS", UNITS_MASS);
 255                 map.put("INERTIA", UNITS_INERTIA);
 256                 map.put("ANGLE", UNITS_ANGLE);
 257                 map.put("DENSITY_BULK", UNITS_DENSITY_BULK);
 258                 map.put("DENSITY_SURFACE", UNITS_DENSITY_SURFACE);
 259                 map.put("DENSITY_LINE", UNITS_DENSITY_LINE);
 260                 map.put("FORCE", UNITS_FORCE);
 261                 map.put("IMPULSE", UNITS_IMPULSE);
 262                 map.put("TIME_STEP", UNITS_TIME_STEP);
 263                 map.put("SHORT_TIME", UNITS_SHORT_TIME);
 264                 map.put("FLIGHT_TIME", UNITS_FLIGHT_TIME);
 265                 map.put("ROLL", UNITS_ROLL);
 266                 map.put("TEMPERATURE", UNITS_TEMPERATURE);
 267                 map.put("PRESSURE", UNITS_PRESSURE);
 268                 map.put("RELATIVE", UNITS_RELATIVE);
 269                 map.put("ROUGHNESS", UNITS_ROUGHNESS);
 270                 map.put("COEFFICIENT", UNITS_COEFFICIENT);
 271
 272                 UNITS = Collections.unmodifiableMap(map);
 273         }
 274
 275         public static void setDefaultMetricUnits() {
 276                 UNITS_LENGTH.setDefaultUnit("cm");
 277                 UNITS_MOTOR_DIMENSIONS.setDefaultUnit("mm");
 278                 UNITS_DISTANCE.setDefaultUnit("m");
 279                 UNITS_AREA.setDefaultUnit("cm" + SQUARED);
 280                 UNITS_STABILITY.setDefaultUnit("cal");
 281                 UNITS_VELOCITY.setDefaultUnit("m/s");
 282                 UNITS_ACCELERATION.setDefaultUnit("m/s" + SQUARED);
 283                 UNITS_MASS.setDefaultUnit("g");
 284                 UNITS_INERTIA.setDefaultUnit("kg" + DOT + "m" + SQUARED);
 285                 UNITS_ANGLE.setDefaultUnit("" + DEGREE);
 286                 UNITS_DENSITY_BULK.setDefaultUnit("g/cm" + CUBED);
 287                 UNITS_DENSITY_SURFACE.setDefaultUnit("g/m" + SQUARED);
 288                 UNITS_DENSITY_LINE.setDefaultUnit("g/m");
 289                 UNITS_FORCE.setDefaultUnit("N");
 290                 UNITS_IMPULSE.setDefaultUnit("Ns");
 291                 UNITS_TIME_STEP.setDefaultUnit("s");
 292                 UNITS_FLIGHT_TIME.setDefaultUnit("s");
 293                 UNITS_ROLL.setDefaultUnit("r/s");
 294                 UNITS_TEMPERATURE.setDefaultUnit(DEGREE + "C");
 295                 UNITS_PRESSURE.setDefaultUnit("mbar");
 296                 UNITS_RELATIVE.setDefaultUnit("%");
 297                 UNITS_ROUGHNESS.setDefaultUnit(MICRO + "m");
 298         }
 299
 300         public static void setDefaultImperialUnits() {
 301                 UNITS_LENGTH.setDefaultUnit("in");
 302                 UNITS_MOTOR_DIMENSIONS.setDefaultUnit("in");
 303                 UNITS_DISTANCE.setDefaultUnit("ft");
 304                 UNITS_AREA.setDefaultUnit("in" + SQUARED);
 305                 UNITS_STABILITY.setDefaultUnit("cal");
 306                 UNITS_VELOCITY.setDefaultUnit("ft/s");
 307                 UNITS_ACCELERATION.setDefaultUnit("ft/s" + SQUARED);
 308                 UNITS_MASS.setDefaultUnit("oz");
 309                 UNITS_INERTIA.setDefaultUnit("lb" + DOT + "ft" + SQUARED);
 310                 UNITS_ANGLE.setDefaultUnit("" + DEGREE);
 311                 UNITS_DENSITY_BULK.setDefaultUnit("oz/in" + CUBED);
 312                 UNITS_DENSITY_SURFACE.setDefaultUnit("oz/ft" + SQUARED);
 313                 UNITS_DENSITY_LINE.setDefaultUnit("oz/ft");
 314                 UNITS_FORCE.setDefaultUnit("N");
 315                 UNITS_IMPULSE.setDefaultUnit("Ns");
 316                 UNITS_TIME_STEP.setDefaultUnit("s");
 317                 UNITS_FLIGHT_TIME.setDefaultUnit("s");
 318                 UNITS_ROLL.setDefaultUnit("r/s");
 319                 UNITS_TEMPERATURE.setDefaultUnit(DEGREE + "F");
 320                 UNITS_PRESSURE.setDefaultUnit("mbar");
 321                 UNITS_RELATIVE.setDefaultUnit("%");
 322                 UNITS_ROUGHNESS.setDefaultUnit("mil");
 323         }
 324
 325
 326         /**
 327          * Return a UnitGroup for stability units based on the rocket.
 328          *
 329          * @param rocket        the rocket from which to calculate the caliber
 330          * @return                      the unit group
 331          */
 332         public static UnitGroup stabilityUnits(Rocket rocket) {
 333                 return new StabilityUnitGroup(rocket);
 334         }
 335
 336
 337         /**
 338          * Return a UnitGroup for stability units based on the rocket configuration.
 339          *
 340          * @param config        the rocket configuration from which to calculate the caliber
 341          * @return                      the unit group
 342          */
 343         public static UnitGroup stabilityUnits(Configuration config) {
 344                 return new StabilityUnitGroup(config);
 345         }
 346
 347
 348         /**
 349          * Return a UnitGroup for stability units based on a constant caliber.
 350          *
 351          * @param reference     the constant reference length
 352          * @return                      the unit group
 353          */
 354         public static UnitGroup stabilityUnits(double reference) {
 355                 return new StabilityUnitGroup(reference);
 356         }
 357
 358
 359         //////////////////////////////////////////////////////
 360
 361
 362         protected ArrayList<Unit> units = new ArrayList<Unit>();
 363         protected int defaultUnit = 0;
 364
 365         public int getUnitCount() {
 366                 return units.size();
 367         }
 368
 369         public Unit getDefaultUnit() {
 370                 return units.get(defaultUnit);
 371         }
 372
 373         public int getDefaultUnitIndex() {
 374                 return defaultUnit;
 375         }
 376
 377         public void setDefaultUnit(int n) {
 378                 if (n < 0 || n >= units.size()) {
 379                         throw new IllegalArgumentException("index out of range: " + n);
 380                 }
 381                 defaultUnit = n;
 382         }
 383
 384
 385
 386         /**
 387          * Find a unit by approximate unit name.  Only letters and (ordinary) numbers are
 388          * considered in the matching.  This method is mainly means for testing, allowing
 389          * a simple means to obtain a particular unit.
 390          *
 391          * @param str   the unit name.
 392          * @return              the corresponding unit, or <code>null</code> if not found.
 393          */
 394         public Unit findApproximate(String str) {
 395                 str = str.replaceAll("\\W", "").trim();
 396                 for (Unit u : units) {
 397                         String name = u.getUnit().replaceAll("\\W", "").trim();
 398                         if (str.equalsIgnoreCase(name))
 399                                 return u;
 400                 }
 401                 return null;
 402         }
 403
 404         /**
 405          * Set the default unit based on the unit name.  Throws an exception if a
 406          * unit with the provided name is not available.
 407          *
 408          * @param   name        the unit name.
 409          * @throws  IllegalArgumentException    if the corresponding unit is not found in the group.
 410          */
 411         public void setDefaultUnit(String name) throws IllegalArgumentException {
 412                 for (int i = 0; i < units.size(); i++) {
 413                         if (units.get(i).getUnit().equals(name)) {
 414                                 setDefaultUnit(i);
 415                                 return;
 416                         }
 417                 }
 418                 throw new IllegalArgumentException("name=" + name);
 419         }
 420
 421
 422         public Unit getUnit(int n) {
 423                 return units.get(n);
 424         }
 425
 426         public int getUnitIndex(Unit u) {
 427                 return units.indexOf(u);
 428         }
 429
 430         private void addUnit(Unit u) {
 431                 units.add(u);
 432         }
 433
 434         public boolean contains(Unit u) {
 435                 return units.contains(u);
 436         }
 437
 438         public Unit[] getUnits() {
 439                 return units.toArray(new Unit[0]);
 440         }
 441
 442
 443         /**
 444          * Return the value formatted by the default unit of this group.
 445          * It is the same as calling <code>getDefaultUnit().toString(value)</code>.
 446          *
 447          * @param value         the SI value to format.
 448          * @return                      the formatted string.
 449          * @see                         Unit#toString(double)
 450          */
 451         public String toString(double value) {
 452                 return this.getDefaultUnit().toString(value);
 453         }
 454
 455
 456         /**
 457          * Return the value formatted by the default unit of this group including the unit.
 458          * It is the same as calling <code>getDefaultUnit().toStringUnit(value)</code>.
 459          *
 460          * @param value         the SI value to format.
 461          * @return                      the formatted string.
 462          * @see                         Unit#toStringUnit(double)
 463          */
 464         public String toStringUnit(double value) {
 465                 return this.getDefaultUnit().toStringUnit(value);
 466         }
 467
 468
 469
 470
 471
 472         /**
 473          * Creates a new Value object with the specified value and the default unit of this group.
 474          *
 475          * @param value the value to set.
 476          * @return              a new Value object.
 477          */
 478         public Value toValue(double value) {
 479                 return this.getDefaultUnit().toValue(value);
 480         }
 481
 482
 483
 484
 485         private static final Pattern STRING_PATTERN = Pattern.compile("^\\s*([0-9.,-]+)(.*?)$");
 486
 487         /**
 488          * Converts a string into an SI value.  If the string has one of the units in this
 489          * group appended to it, that unit will be used in conversion.  Otherwise the default
 490          * unit will be used.  If an unknown unit is specified or the value does not parse
 491          * with <code>Double.parseDouble</code> then a <code>NumberFormatException</code>
 492          * is thrown.
 493          * <p>
 494          * This method is applicable only for simple units without e.g. powers.
 495          *
 496          * @param str   the string to parse.
 497          * @return              the SI value.
 498          * @throws NumberFormatException   if the string cannot be parsed.
 499          */
 500         public double fromString(String str) {
 501                 Matcher matcher = STRING_PATTERN.matcher(str);
 502
 503                 if (!matcher.matches()) {
 504                         throw new NumberFormatException("string did not match required pattern");
 505                 }
 506
 507                 double value = Double.parseDouble(matcher.group(1));
 508                 String unit = matcher.group(2).trim();
 509
 510                 if (unit.equals("")) {
 511                         value = this.getDefaultUnit().fromUnit(value);
 512                 } else {
 513                         int i;
 514                         for (i = 0; i < units.size(); i++) {
 515                                 Unit u = units.get(i);
 516                                 if (unit.equalsIgnoreCase(u.getUnit())) {
 517                                         value = u.fromUnit(value);
 518                                         break;
 519                                 }
 520                         }
 521                         if (i >= units.size()) {
 522                                 throw new NumberFormatException("unknown unit " + unit);
 523                         }
 524                 }
 525
 526                 return value;
 527         }
 528
 529
 530         ///////////////////////////
 531
 532
 533         /**
 534          * A private class that switches the CaliberUnit to a rocket-specific CaliberUnit.
 535          * All other methods are passed through to UNITS_STABILITY.
 536          */
 537         private static class StabilityUnitGroup extends UnitGroup {
 538
 539                 public StabilityUnitGroup(double ref) {
 540                         this(new CaliberUnit(ref));
 541                 }
 542
 543                 public StabilityUnitGroup(Rocket rocket) {
 544                         this(new CaliberUnit(rocket));
 545                 }
 546
 547                 public StabilityUnitGroup(Configuration config) {
 548                         this(new CaliberUnit(config));
 549                 }
 550
 551                 private StabilityUnitGroup(CaliberUnit caliberUnit) {
 552                         this.units.addAll(UnitGroup.UNITS_STABILITY.units);
 553                         this.defaultUnit = UnitGroup.UNITS_STABILITY.defaultUnit;
 554                         for (int i = 0; i < units.size(); i++) {
 555                                 if (units.get(i) instanceof CaliberUnit) {
 556                                         units.set(i, caliberUnit);
 557                                 }
 558                         }
 559                 }
 560
 561
 562                 @Override
 563                 public void setDefaultUnit(int n) {
 564                         super.setDefaultUnit(n);
 565                         UNITS_STABILITY.setDefaultUnit(n);
 566                 }
 567         }
 568 }