git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/file/RocketLoader.java

   1 package net.sf.openrocket.file;
   2
   3 import java.io.BufferedInputStream;
   4 import java.io.File;
   5 import java.io.FileInputStream;
   6 import java.io.FileNotFoundException;
   7 import java.io.IOException;
   8 import java.io.InputStream;
   9
  10 import net.sf.openrocket.aerodynamics.WarningSet;
  11 import net.sf.openrocket.document.OpenRocketDocument;
  12
  13
  14 public abstract class RocketLoader {
  15         protected final WarningSet warnings = new WarningSet();
  16
  17
  18         /**
  19          * Loads a rocket from the specified File object.
  20          */
  21         public final OpenRocketDocument load(File source) throws RocketLoadException {
  22                 warnings.clear();
  23
  24                 try {
  25                         return load(new BufferedInputStream(new FileInputStream(source)));
  26                 } catch (FileNotFoundException e) {
  27                         throw new RocketLoadException("File not found: " + source);
  28                 }
  29         }
  30
  31         /**
  32          * Loads a rocket from the specified InputStream.
  33          */
  34         public final OpenRocketDocument load(InputStream source) throws RocketLoadException {
  35                 warnings.clear();
  36
  37                 try {
  38                         return loadFromStream(source);
  39                 } catch (RocketLoadException e) {
  40                         throw e;
  41                 } catch (IOException e) {
  42                         throw new RocketLoadException("I/O error: " + e.getMessage());
  43                 } catch (Exception e) {
  44                         throw new RocketLoadException("An unknown error occurred.  Please report a bug.", e);
  45                 } catch (Throwable e) {
  46                         throw new RocketLoadException("A serious error occurred and the software may be "
  47                                         + "unstable.  Save your designs and restart OpenRocket.", e);
  48                 }
  49         }
  50
  51
  52
  53         /**
  54          * This method is called by the default implementations of {@link #load(File)}
  55          * and {@link #load(InputStream)} to load the rocket.
  56          *
  57          * @throws RocketLoadException  if an error occurs during loading.
  58          */
  59         protected abstract OpenRocketDocument loadFromStream(InputStream source) throws IOException,
  60                         RocketLoadException;
  61
  62
  63
  64         public final WarningSet getWarnings() {
  65                 return warnings;
  66         }
  67 }