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