tim/prune/load/xml/ZipFileLoader.java

   1 package tim.prune.load.xml;
   2
   3 import java.io.File;
   4 import java.util.Enumeration;
   5 import java.util.zip.ZipEntry;
   6 import java.util.zip.ZipFile;
   7
   8 import javax.xml.parsers.SAXParser;
   9 import javax.xml.parsers.SAXParserFactory;
  10
  11 import tim.prune.App;
  12 import tim.prune.data.Altitude;
  13
  14 /**
  15  * Class to handle the loading of zipped xml files
  16  */
  17 public class ZipFileLoader
  18 {
  19         /** App for callback of file loading */
  20         private App _app = null;
  21         /** Object to do the handling of the xml */
  22         XmlFileLoader _xmlLoader = null;
  23
  24         /**
  25          * Constructor
  26          * @param inApp App object
  27          * @param inXmlLoader object to do the xml handling
  28          */
  29         public ZipFileLoader(App inApp, XmlFileLoader inXmlLoader)
  30         {
  31                 _app = inApp;
  32                 _xmlLoader = inXmlLoader;
  33         }
  34
  35         /**
  36          * Open the selected file and show the GUI dialog to select load options
  37          * @param inFile File to open
  38          */
  39         public void openFile(File inFile)
  40         {
  41                 try
  42                 {
  43                         ZipFile file = new ZipFile(inFile);
  44                         Enumeration<?> entries = file.entries();
  45                         boolean xmlFound = false;
  46                         while (entries.hasMoreElements() && !xmlFound)
  47                         {
  48                                 ZipEntry entry = (ZipEntry) entries.nextElement();
  49                                 String entryName = entry.toString();
  50                                 if (entryName != null && entryName.length() > 4)
  51                                 {
  52                                         String suffix = entryName.substring(entryName.length()-4).toLowerCase();
  53                                         if (suffix.equals(".kml") || suffix.equals(".gpx") || suffix.equals(".xml"))
  54                                         {
  55                                                 _xmlLoader.reset();
  56                                                 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
  57                                                 saxParser.parse(file.getInputStream(entry), _xmlLoader);
  58                                                 XmlHandler handler = _xmlLoader.getHandler();
  59                                                 if (handler == null) {
  60                                                         _app.showErrorMessage("error.load.dialogtitle", "error.load.othererror");
  61                                                 }
  62                                                 else {
  63                                                         // Send back to app
  64                                                         _app.informDataLoaded(handler.getFieldArray(), handler.getDataArray(),
  65                                                                 Altitude.Format.METRES, inFile.getName());
  66                                                         xmlFound = true;
  67                                                 }
  68                                         }
  69                                 }
  70                         }
  71                         file.close();
  72                         // Check whether there was an xml file inside
  73                         if (!xmlFound) {
  74                                 _app.showErrorMessage("error.load.dialogtitle", "error.load.noxmlinzip");
  75                         }
  76                 }
  77                 catch (Exception e) {
  78                         System.err.println("Error: " + e.getMessage());
  79                 }
  80         }
  81
  82 }