tim/prune/load/xml/GzipFileLoader.java

   1 package tim.prune.load.xml;
   2
   3 import java.io.File;
   4 import java.io.FileInputStream;
   5 import java.util.zip.GZIPInputStream;
   6 import tim.prune.App;
   7 import tim.prune.I18nManager;
   8 import tim.prune.data.SourceInfo;
   9 import tim.prune.load.MediaLinkInfo;
  10
  11 /**
  12  * Class to handle the loading of gzipped xml files
  13  */
  14 public class GzipFileLoader
  15 {
  16         /** App for callback of file loading */
  17         private App _app = null;
  18         /** Object to do the handling of the xml */
  19         XmlFileLoader _xmlLoader = null;
  20
  21         /**
  22          * Constructor
  23          * @param inApp App object
  24          * @param inXmlLoader object to do the xml handling
  25          */
  26         public GzipFileLoader(App inApp, XmlFileLoader inXmlLoader)
  27         {
  28                 _app = inApp;
  29                 _xmlLoader = inXmlLoader;
  30         }
  31
  32         /**
  33          * Open the selected file and select appropriate xml loader
  34          * @param inFile File to open
  35          */
  36         public void openFile(File inFile)
  37         {
  38                 GZIPInputStream istream = null;
  39                 try
  40                 {
  41                         istream = new GZIPInputStream(new FileInputStream(inFile));
  42                         _xmlLoader.reset();
  43                         // Parse the stream using either Xerces or java classes
  44                         _xmlLoader.parseXmlStream(istream);
  45                         XmlHandler handler = _xmlLoader.getHandler();
  46                         if (handler == null) {
  47                                 _app.showErrorMessage("error.load.dialogtitle", "error.load.noread");
  48                         }
  49                         else
  50                         {
  51                                 // Send back to app
  52                                 SourceInfo sourceInfo = new SourceInfo(inFile,
  53                                         (handler instanceof GpxHandler?SourceInfo.FILE_TYPE.GPX:SourceInfo.FILE_TYPE.KML));
  54                                 _app.informDataLoaded(handler.getFieldArray(), handler.getDataArray(),
  55                                         null, sourceInfo, handler.getTrackNameList(),
  56                                         new MediaLinkInfo(inFile, handler.getLinkArray()));
  57                         }
  58                 }
  59                 catch (Exception e)
  60                 {
  61                         // Error occurred, could be a non-xml file borking the parser
  62                         _app.showErrorMessageNoLookup("error.load.dialogtitle",
  63                                 I18nManager.getText("error.load.othererror") + " " + e.getClass().getName());
  64                         // It would be nice to verify the filename of the file inside the gz,
  65                         // but the java classes don't give access to this information
  66                 }
  67                 finally {
  68                         try {
  69                                 istream.close();
  70                         }
  71                         catch (Exception e2) {}
  72                 }
  73         }
  74 }