tim/prune/load/xml/ZipFileLoader.java

   1 package tim.prune.load.xml;
   2
   3 import java.io.File;
   4 import java.io.InputStream;
   5 import java.util.Enumeration;
   6 import java.util.zip.ZipEntry;
   7 import java.util.zip.ZipFile;
   8 import java.util.zip.ZipInputStream;
   9
  10 import javax.xml.parsers.SAXParser;
  11 import javax.xml.parsers.SAXParserFactory;
  12
  13 import tim.prune.App;
  14 import tim.prune.data.Altitude;
  15 import tim.prune.data.SourceInfo;
  16 import tim.prune.load.MediaLinkInfo;
  17
  18 /**
  19  * Class to handle the loading of zipped xml files
  20  */
  21 public class ZipFileLoader
  22 {
  23         /** App for callback of file loading */
  24         private App _app = null;
  25         /** Object to do the handling of the xml */
  26         private XmlFileLoader _xmlLoader = null;
  27
  28         /**
  29          * Constructor
  30          * @param inApp App object
  31          * @param inXmlLoader object to do the xml handling
  32          */
  33         public ZipFileLoader(App inApp, XmlFileLoader inXmlLoader)
  34         {
  35                 _app = inApp;
  36                 _xmlLoader = inXmlLoader;
  37         }
  38
  39         /**
  40          * Open the selected file and select appropriate xml loader
  41          * @param inFile File to open
  42          */
  43         public void openFile(File inFile)
  44         {
  45                 try
  46                 {
  47                         ZipFile file = new ZipFile(inFile);
  48                         Enumeration<?> entries = file.entries();
  49                         boolean xmlFound = false;
  50                         while (entries.hasMoreElements() && !xmlFound)
  51                         {
  52                                 ZipEntry entry = (ZipEntry) entries.nextElement();
  53                                 String entryName = entry.toString();
  54                                 if (entryName != null && entryName.length() > 4)
  55                                 {
  56                                         String suffix = entryName.substring(entryName.length()-4).toLowerCase();
  57                                         if (suffix.equals(".kml") || suffix.equals(".gpx") || suffix.equals(".xml"))
  58                                         {
  59                                                 _xmlLoader.reset();
  60                                                 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
  61                                                 saxParser.parse(file.getInputStream(entry), _xmlLoader);
  62                                                 XmlHandler handler = _xmlLoader.getHandler();
  63                                                 if (handler == null) {
  64                                                         _app.showErrorMessage("error.load.dialogtitle", "error.load.othererror");
  65                                                 }
  66                                                 else
  67                                                 {
  68                                                         // Send back to app
  69                                                         SourceInfo sourceInfo = new SourceInfo(inFile,
  70                                                                 (handler instanceof GpxHandler?SourceInfo.FILE_TYPE.GPX:SourceInfo.FILE_TYPE.KML));
  71                                                         _app.informDataLoaded(handler.getFieldArray(), handler.getDataArray(),
  72                                                                 Altitude.Format.METRES, sourceInfo, handler.getTrackNameList(),
  73                                                                 new MediaLinkInfo(inFile, handler.getLinkArray()));
  74                                                         xmlFound = true;
  75                                                 }
  76                                         }
  77                                 }
  78                         }
  79                         file.close();
  80                         // Check whether there was an xml file inside
  81                         if (!xmlFound) {
  82                                 _app.showErrorMessage("error.load.dialogtitle", "error.load.noxmlinzip");
  83                         }
  84                 }
  85                 catch (Exception e) {
  86                         System.err.println("ZipFile Error: " + e.getClass().getName() + " -message= " + e.getMessage());
  87                 }
  88         }
  89
  90         /**
  91          * Use the given stream to access a remote zip file
  92          * @param inStream stream to use to access file
  93          */
  94         public void openStream(InputStream inStream)
  95         {
  96                 try
  97                 {
  98                         ZipInputStream zis = new ZipInputStream(inStream);
  99                         boolean xmlFound = false;
 100                         while (!xmlFound && zis.available() > 0)
 101                         {
 102                                 ZipEntry entry = zis.getNextEntry();
 103                                 String entryName = entry.toString();
 104                                 if (entryName != null && entryName.length() > 4)
 105                                 {
 106                                         String suffix = entryName.substring(entryName.length()-4).toLowerCase();
 107                                         if (suffix.equals(".kml") || suffix.equals(".gpx") || suffix.equals(".xml"))
 108                                         {
 109                                                 _xmlLoader.reset();
 110                                                 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
 111                                                 saxParser.parse(zis, _xmlLoader);
 112                                                 XmlHandler handler = _xmlLoader.getHandler();
 113                                                 if (handler == null) {
 114                                                         _app.showErrorMessage("error.load.dialogtitle", "error.load.othererror");
 115                                                 }
 116                                                 else
 117                                                 {
 118                                                         // Send back to app
 119                                                         _app.informDataLoaded(handler.getFieldArray(), handler.getDataArray(),
 120                                                                 Altitude.Format.METRES, new SourceInfo("gpsies", SourceInfo.FILE_TYPE.GPSIES),
 121                                                                 handler.getTrackNameList());
 122                                                         xmlFound = true;
 123                                                 }
 124                                         }
 125                                 }
 126                         }
 127                         // Check whether there was an xml file inside
 128                         if (!xmlFound) {
 129                                 _app.showErrorMessage("error.load.dialogtitle", "error.load.noxmlinzip");
 130                         }
 131                 }
 132                 catch (Exception e) {
 133                         System.err.println("ZipStream Error: " + e.getClass().getName() + " -message= " + e.getMessage());
 134                 }
 135         }
 136 }