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

   1 package net.sf.openrocket.file;
   2
   3 import java.awt.Component;
   4 import java.io.BufferedInputStream;
   5 import java.io.File;
   6 import java.io.FileInputStream;
   7 import java.io.FileNotFoundException;
   8 import java.io.IOException;
   9 import java.io.InputStream;
  10
  11 import javax.swing.ProgressMonitorInputStream;
  12
  13 import net.sf.openrocket.aerodynamics.WarningSet;
  14 import net.sf.openrocket.document.OpenRocketDocument;
  15
  16
  17 public abstract class RocketLoader {
  18         protected final WarningSet warnings = new WarningSet();
  19
  20
  21         public final OpenRocketDocument load(File source, Component parent)
  22         throws RocketLoadException {
  23                 warnings.clear();
  24
  25                 try {
  26                         return load(new BufferedInputStream(new ProgressMonitorInputStream(
  27                                         parent, "Loading " + source.getName(),
  28                                         new FileInputStream(source))));
  29                 } catch (FileNotFoundException e) {
  30                         throw new RocketLoadException("File not found: " + source);
  31                 }
  32         }
  33
  34         /**
  35          * Loads a rocket from the specified File object.
  36          */
  37         public final OpenRocketDocument load(File source) throws RocketLoadException {
  38                 warnings.clear();
  39
  40                 try {
  41                         return load(new BufferedInputStream(new FileInputStream(source)));
  42                 } catch (FileNotFoundException e) {
  43                         throw new RocketLoadException("File not found: " + source);
  44                 }
  45         }
  46
  47         /**
  48          * Loads a rocket from the specified InputStream.
  49          */
  50         public final OpenRocketDocument load(InputStream source) throws RocketLoadException {
  51                 warnings.clear();
  52
  53                 try {
  54                         return loadFromStream(source);
  55                 } catch (RocketLoadException e) {
  56                         throw e;
  57                 } catch (IOException e) {
  58                         throw new RocketLoadException("I/O error: " + e.getMessage());
  59                 } catch (Exception e) {
  60                         throw new RocketLoadException("An unknown error occurred.  Please report a bug.", e);
  61                 } catch (Throwable e) {
  62                         throw new RocketLoadException("A serious error occurred and the software may be "
  63                                         + "unstable.  Save your designs and restart OpenRocket.", e);
  64                 }
  65         }
  66
  67
  68
  69         /**
  70          * This method is called by the default implementations of {@link #load(File)}
  71          * and {@link #load(InputStream)} to load the rocket.
  72          *
  73          * @throws RocketLoadException  if an error occurs during loading.
  74          */
  75         protected abstract OpenRocketDocument loadFromStream(InputStream source) throws IOException,
  76                         RocketLoadException;
  77
  78
  79
  80         public final WarningSet getWarnings() {
  81                 return warnings;
  82         }
  83 }