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