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

   1 package com.billkuker.rocketry.motorsim.fuel;\r
   2 \r
   3 import java.io.File;\r
   4 import java.io.FileInputStream;\r
   5 import java.io.FileNotFoundException;\r
   6 import java.io.IOException;\r
   7 import java.net.URI;\r
   8 import java.net.URISyntaxException;\r
   9 import java.util.Collections;\r
  10 import java.util.HashMap;\r
  11 import java.util.HashSet;\r
  12 import java.util.Map;\r
  13 import java.util.Set;\r
  14 \r
  15 import com.billkuker.rocketry.motorsim.Fuel;\r
  16 import com.billkuker.rocketry.motorsim.io.MotorIO;\r
  17 \r
  18 public class FuelResolver {\r
  19         public static class FuelNotFound extends Exception {\r
  20                 private static final long serialVersionUID = 1L;\r
  21         }\r
  22         \r
  23         public static interface FuelsChangeListener {\r
  24                 public void fuelsChanged();\r
  25         }\r
  26 \r
  27         private static Set<FuelsChangeListener> listeners = new HashSet<FuelResolver.FuelsChangeListener>();\r
  28         private static Map<URI, Fuel> fuels = new HashMap<URI, Fuel>();\r
  29         private static Map<Fuel, URI> uris = new HashMap<Fuel, URI>();\r
  30 \r
  31         static {\r
  32                 try {\r
  33                         add(new KNSB(), new URI("motorsim:KNSB"));\r
  34                         add(new KNDX(), new URI("motorsim:KNDX"));\r
  35                         add(new KNSU(), new URI("motorsim:KNSU"));\r
  36                         add(new KNER(), new URI("motorsim:KNER"));\r
  37                 } catch (URISyntaxException e) {\r
  38                         e.printStackTrace();\r
  39                 }\r
  40         }\r
  41         \r
  42         public static void addFuelsChangeListener(FuelsChangeListener l){\r
  43                 listeners.add(l);\r
  44         }\r
  45         \r
  46         public static void removeFuelsChangeListener(FuelsChangeListener l){\r
  47                 listeners.remove(l);\r
  48         }\r
  49         \r
  50         public static Map<URI, Fuel> getFuelMap(){\r
  51                 return Collections.unmodifiableMap(fuels);\r
  52         }\r
  53 \r
  54         public static URI getURI( Fuel f ){\r
  55                 return uris.get(f);\r
  56         }\r
  57         \r
  58         public static Fuel getFuel(URI u) throws FuelNotFound {\r
  59                 if (fuels.containsKey(u))\r
  60                         return fuels.get(u);\r
  61                 return tryResolve(u);\r
  62         }\r
  63 \r
  64         private static Fuel tryResolve(URI u) throws FuelNotFound {\r
  65                 File f = new File(u);\r
  66                 try {\r
  67                         Fuel fuel = MotorIO.readFuel(new FileInputStream(f));\r
  68                         add(fuel, u);\r
  69                         return fuel;\r
  70                 } catch (FileNotFoundException e) {\r
  71                         throw new FuelNotFound();\r
  72                 } catch (IOException e) {\r
  73                         throw new FuelNotFound();\r
  74                 }\r
  75         }\r
  76 \r
  77         public static void add(Fuel f, URI uri) {\r
  78                 fuels.put(uri, f);\r
  79                 uris.put(f, uri);\r
  80                 for ( FuelsChangeListener l : listeners )\r
  81                         l.fuelsChanged();\r
  82         }\r
  83 }\r