git.gag.com Git - sw/motorsim/blob - src/com/billkuker/rocketry/motorsim/RocketScience.java

   1 package com.billkuker.rocketry.motorsim;\r
   2 \r
   3 import java.util.HashSet;\r
   4 import java.util.Set;\r
   5 \r
   6 import javax.measure.quantity.Pressure;\r
   7 import javax.measure.quantity.Quantity;\r
   8 import javax.measure.unit.NonSI;\r
   9 import javax.measure.unit.ProductUnit;\r
  10 import javax.measure.unit.SI;\r
  11 import javax.measure.unit.Unit;\r
  12 import javax.measure.unit.UnitFormat;\r
  13 \r
  14 public class RocketScience {\r
  15         public static Unit<Pressure> PSI = new ProductUnit<Pressure>(NonSI.POUND_FORCE.divide(NonSI.INCH.pow(2)));\r
  16         public static Unit<Impulse> NEWTON_SECOND = new ProductUnit<Impulse>(SI.NEWTON.times(SI.SECOND));\r
  17         static{\r
  18                 UnitFormat.getInstance().label(PSI, "psi");\r
  19                 UnitFormat.getInstance().label(NEWTON_SECOND, "Ns");\r
  20         }\r
  21 \r
  22         public interface MolarWeight extends Quantity {\r
  23                 public static final Unit<MolarWeight> UNIT = new ProductUnit<MolarWeight>(\r
  24                                 SI.KILOGRAM.divide(SI.MOLE));\r
  25         }\r
  26         \r
  27         public interface Impulse extends Quantity {\r
  28                 public static Unit<Impulse> UNIT = NEWTON_SECOND;\r
  29         }\r
  30 \r
  31         public static enum UnitPreference{\r
  32                 SI(new Unit[]{\r
  33                                 javax.measure.unit.SI.MILLIMETER,\r
  34                                 javax.measure.unit.SI.NEWTON,\r
  35                                 javax.measure.unit.SI.MEGA(javax.measure.unit.SI.PASCAL),\r
  36                                 NEWTON_SECOND\r
  37                 }),\r
  38                 NONSI(new Unit[]{\r
  39                                 javax.measure.unit.NonSI.INCH,\r
  40                                 javax.measure.unit.NonSI.POUND_FORCE,\r
  41                                 PSI,\r
  42                                 NEWTON_SECOND\r
  43                 });\r
  44                 \r
  45                 public static UnitPreference preference = SI;\r
  46                 \r
  47                 protected Set<Unit<?>> units = new HashSet<Unit<?>>();\r
  48                 \r
  49                 @SuppressWarnings("unchecked")\r
  50                 UnitPreference( Unit u[] ){\r
  51                         for ( Unit uu : u )\r
  52                                 units.add(uu);\r
  53                 }\r
  54                 \r
  55                 @SuppressWarnings("unchecked")\r
  56                 public Unit getPreferredUnit(Unit u){\r
  57                         if ( units.contains(u) )\r
  58                                 return u;\r
  59                         for( Unit ret : units ){\r
  60                                 if ( ret.isCompatible(u) ){\r
  61                                         return ret;\r
  62                                 }\r
  63                         }\r
  64                         return u;\r
  65                 }\r
  66         }\r
  67 \r
  68 }\r