tim/prune/load/FileLoader.java

   1 package tim.prune.load;
   2
   3 import java.io.File;
   4
   5 import javax.swing.JFileChooser;
   6 import javax.swing.JFrame;
   7
   8 import tim.prune.App;
   9 import tim.prune.Config;
  10 import tim.prune.load.xml.XmlFileLoader;
  11 import tim.prune.load.xml.ZipFileLoader;
  12
  13
  14 /**
  15  * Generic FileLoader class to select a file
  16  * and pass handling on to appropriate loader
  17  */
  18 public class FileLoader
  19 {
  20         private App _app;
  21         private JFileChooser _fileChooser = null;
  22         private JFrame _parentFrame;
  23         private TextFileLoader _textFileLoader = null;
  24         private XmlFileLoader _xmlFileLoader = null;
  25         private ZipFileLoader _zipFileLoader = null;
  26
  27
  28         /**
  29          * Constructor
  30          * @param inApp Application object to inform of track load
  31          * @param inParentFrame parent frame to reference for dialogs
  32          */
  33         public FileLoader(App inApp, JFrame inParentFrame)
  34         {
  35                 _app = inApp;
  36                 _parentFrame = inParentFrame;
  37                 _textFileLoader = new TextFileLoader(inApp, inParentFrame);
  38                 _xmlFileLoader = new XmlFileLoader(inApp);
  39                 _zipFileLoader = new ZipFileLoader(inApp, _xmlFileLoader);
  40         }
  41
  42
  43         /**
  44          * Select an input file and open the GUI frame
  45          * to select load options
  46          */
  47         public void openFile()
  48         {
  49                 // Construct file chooser if necessary
  50                 if (_fileChooser == null)
  51                 {
  52                         _fileChooser = new JFileChooser();
  53                         _fileChooser.addChoosableFileFilter(new GenericFileFilter("filetype.txt", new String[] {"txt", "text"}));
  54                         _fileChooser.addChoosableFileFilter(new GenericFileFilter("filetype.gpx", new String[] {"gpx"}));
  55                         _fileChooser.addChoosableFileFilter(new GenericFileFilter("filetype.kml", new String[] {"kml"}));
  56                         _fileChooser.addChoosableFileFilter(new GenericFileFilter("filetype.kmz", new String[] {"kmz"}));
  57                         _fileChooser.setAcceptAllFileFilterUsed(true);
  58                         // start from directory in config if already set (by load jpegs)
  59                         File configDir = Config.getWorkingDirectory();
  60                         if (configDir != null) {_fileChooser.setCurrentDirectory(configDir);}
  61                 }
  62                 // Show the open dialog
  63                 if (_fileChooser.showOpenDialog(_parentFrame) == JFileChooser.APPROVE_OPTION)
  64                 {
  65                         File file = _fileChooser.getSelectedFile();
  66                         // Check file exists and is readable
  67                         if (file != null && file.exists() && file.canRead())
  68                         {
  69                                 // Store directory in config for later
  70                                 Config.setWorkingDirectory(file.getParentFile());
  71                                 // Check file type to see if it's xml or just normal text
  72                                 String fileExtension = file.getName().toLowerCase();
  73                                 if (fileExtension.length() > 4)
  74                                         {fileExtension = fileExtension.substring(fileExtension.length() - 4);}
  75                                 if (fileExtension.equals(".kml") || fileExtension.equals(".gpx")
  76                                         || fileExtension.equals(".xml"))
  77                                 {
  78                                         // Use xml loader for kml, gpx and xml filenames
  79                                         _xmlFileLoader.openFile(file);
  80                                 }
  81                                 else if (fileExtension.equals(".kmz") || fileExtension.equals(".zip"))
  82                                 {
  83                                         // Use zip loader for zipped kml (or zipped gpx)
  84                                         _zipFileLoader.openFile(file);
  85                                 }
  86                                 else
  87                                 {
  88                                         // Use text loader for everything else
  89                                         _textFileLoader.openFile(file);
  90                                 }
  91                         }
  92                         else
  93                         {
  94                                 // couldn't read file - show error message
  95                                 _app.showErrorMessage("error.load.dialogtitle", "error.load.noread");
  96                         }
  97                 }
  98         }
  99
 100         /**
 101          * @return the last delimiter character used for a text file load
 102          */
 103         public char getLastUsedDelimiter()
 104         {
 105                 return _textFileLoader.getLastUsedDelimiter();
 106         }
 107 }