git.gag.com Git - debian/openrocket/blob - core/src/net/sf/openrocket/file/AbstractRocketLoader.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 AbstractRocketLoader implements RocketLoader {
  15         protected final WarningSet warnings = new WarningSet();
  16
  17
  18         /**
  19          * Loads a rocket from the specified File object.
  20          */
  21         @Override
  22         public final OpenRocketDocument load(File source, MotorFinder motorFinder) throws RocketLoadException {
  23                 warnings.clear();
  24                 InputStream stream = null;
  25
  26                 try {
  27
  28                         stream = new BufferedInputStream(new FileInputStream(source));
  29                         return load(stream, motorFinder);
  30
  31                 } catch (FileNotFoundException e) {
  32                         throw new RocketLoadException("File not found: " + source);
  33                 } finally {
  34                         if (stream != null) {
  35                                 try {
  36                                         stream.close();
  37                                 } catch (IOException e) {
  38                                         e.printStackTrace();
  39                                 }
  40                         }
  41                 }
  42         }
  43
  44         /**
  45          * Loads a rocket from the specified InputStream.
  46          */
  47         @Override
  48         public final OpenRocketDocument load(InputStream source, MotorFinder motorFinder) throws RocketLoadException {
  49                 warnings.clear();
  50
  51                 try {
  52                         return loadFromStream(source, motorFinder);
  53                 } catch (RocketLoadException e) {
  54                         throw e;
  55                 } catch (IOException e) {
  56                         throw new RocketLoadException("I/O error: " + e.getMessage(), e);
  57                 }
  58         }
  59
  60
  61
  62         /**
  63          * This method is called by the default implementations of #load(File)
  64          * and load(InputStream) to load the rocket.
  65          *
  66          * @throws RocketLoadException  if an error occurs during loading.
  67          */
  68         protected abstract OpenRocketDocument loadFromStream(InputStream source, MotorFinder motorFinder) throws IOException,
  69                         RocketLoadException;
  70
  71
  72
  73         @Override
  74         public final WarningSet getWarnings() {
  75                 return warnings;
  76         }
  77 }