+++ /dev/null
-package tim.prune.function.srtm;
-
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URL;
-import java.net.URLConnection;
-import java.util.ArrayList;
-
-import javax.swing.JOptionPane;
-
-import tim.prune.App;
-import tim.prune.GenericFunction;
-import tim.prune.GpsPrune;
-import tim.prune.I18nManager;
-import tim.prune.config.Config;
-import tim.prune.data.DoubleRange;
-import tim.prune.gui.ProgressDialog;
-
-/**
- * Class to provide a download function for the Space Shuttle's SRTM data files.
- * HGT files are downloaded into memory via HTTP and stored in the map cache.
- */
-public class DownloadSrtmFunction extends GenericFunction implements Runnable
-{
- /** Progress dialog */
- private ProgressDialog _progress = null;
- /** Flag to check whether this function is currently running or not */
- private boolean _running = false;
-
-
- /**
- * Constructor
- * @param inApp App object
- */
- public DownloadSrtmFunction(App inApp) {
- super(inApp);
- }
-
- /** @return name key */
- public String getNameKey() {
- return "function.downloadsrtm";
- }
-
- /**
- * Begin the download
- */
- public void begin()
- {
- _running = true;
- if (_progress == null) {
- _progress = new ProgressDialog(_parentFrame, getNameKey());
- }
- _progress.show();
- // start new thread for time-consuming part
- new Thread(this).start();
- }
-
- /**
- * Run method using separate thread
- */
- public void run()
- {
- // Compile list of tiles to get
- ArrayList<SrtmTile> tileList = new ArrayList<SrtmTile>();
-
- // First, loop to see which tiles are needed
- DoubleRange lonRange = _app.getTrackInfo().getTrack().getLonRange();
- DoubleRange latRange = _app.getTrackInfo().getTrack().getLatRange();
- final int minLon = (int) Math.floor(lonRange.getMinimum());
- final int maxLon = (int) Math.floor(lonRange.getMaximum());
- final int minLat = (int) Math.floor(latRange.getMinimum());
- final int maxLat = (int) Math.floor(latRange.getMaximum());
-
- for (int lon=minLon; lon<= maxLon; lon++)
- {
- for (int lat=minLat; lat <= maxLat; lat++)
- {
- SrtmTile tile = new SrtmTile(lat, lon);
- boolean alreadyGot = false;
- for (int t = 0; t < tileList.size(); t++)
- {
- if (tileList.get(t).equals(tile)) {
- alreadyGot = true;
- }
- }
- if (!alreadyGot) {tileList.add(tile);}
- }
- }
-
- downloadTiles(tileList);
- // Finished
- _running = false;
- }
-
-
- /**
- * Download the tiles of SRTM data
- * @param inTileList list of tiles to get
- */
- private void downloadTiles(ArrayList<SrtmTile> inTileList)
- {
- // Update progress bar
- if (_progress != null)
- {
- _progress.setMaximum(inTileList.size());
- _progress.setValue(0);
- }
-
- String errorMessage = null;
-
- // Check the cache is ok
- final String diskCachePath = Config.getConfigString(Config.KEY_DISK_CACHE);
- if (diskCachePath != null)
- {
- File srtmDir = new File(diskCachePath, "srtm");
- if (!srtmDir.exists() && !srtmDir.mkdir()) {
- // can't create the srtm directory
- errorMessage = I18nManager.getText("error.downloadsrtm.nocache");
- }
- }
- else {
- // no cache set up
- errorMessage = I18nManager.getText("error.downloadsrtm.nocache");
- }
-
- // Get urls for each tile
- URL[] urls = TileFinder.getUrls(inTileList);
- int numDownloaded = 0;
- for (int t=0; t<inTileList.size() && !_progress.isCancelled(); t++)
- {
- if (urls[t] != null)
- {
- // Define streams
- FileOutputStream outStream = null;
- InputStream inStream = null;
- try
- {
- // Set progress
- _progress.setValue(t);
- // See if we've already got this tile or not
- File outputFile = getFileToWrite(urls[t]);
- if (outputFile != null)
- {
- // System.out.println("Download: Need to download: " + urls[t]);
- outStream = new FileOutputStream(outputFile);
- URLConnection conn = urls[t].openConnection();
- conn.setRequestProperty("User-Agent", "GpsPrune v" + GpsPrune.VERSION_NUMBER);
- inStream = conn.getInputStream();
- // Copy all the bytes to the file
- int c;
- while ((c = inStream.read()) != -1)
- {
- outStream.write(c);
- }
-
- numDownloaded++;
- }
- // else System.out.println("Don't need to download: " + urls[t].getFile());
- }
- catch (IOException ioe) {errorMessage = ioe.getClass().getName() + " - " + ioe.getMessage();
- }
- // Make sure streams are closed
- try {inStream.close();} catch (Exception e) {}
- try {outStream.close();} catch (Exception e) {}
- }
- }
-
- _progress.dispose();
- if (_progress.isCancelled()) {
- return;
- }
-
- if (errorMessage != null) {
- _app.showErrorMessageNoLookup(getNameKey(), errorMessage);
- }
- else if (numDownloaded == 1)
- {
- JOptionPane.showMessageDialog(_parentFrame, I18nManager.getTextWithNumber("confirm.downloadsrtm.1", numDownloaded),
- I18nManager.getText(getNameKey()), JOptionPane.INFORMATION_MESSAGE);
- }
- else if (numDownloaded > 1)
- {
- JOptionPane.showMessageDialog(_parentFrame, I18nManager.getTextWithNumber("confirm.downloadsrtm", numDownloaded),
- I18nManager.getText(getNameKey()), JOptionPane.INFORMATION_MESSAGE);
- }
- else if (inTileList.size() > 0) {
- _app.showErrorMessage(getNameKey(), "confirm.downloadsrtm.none");
- }
- }
-
- /**
- * See whether the SRTM file is already available locally
- * @param inUrl URL for online resource
- * @return file object to write to, or null if already there
- */
- private static File getFileToWrite(URL inUrl)
- {
- String diskCachePath = Config.getConfigString(Config.KEY_DISK_CACHE);
- if (diskCachePath != null)
- {
- File srtmDir = new File(diskCachePath, "srtm");
- if (srtmDir.exists() && srtmDir.isDirectory() && srtmDir.canRead())
- {
- File srtmFile = new File(srtmDir, new File(inUrl.getFile()).getName());
- if (!srtmFile.exists() || !srtmFile.canRead() || srtmFile.length() <= 400) {
- return srtmFile;
- }
- }
- }
- return null;
- }
-
- /**
- * @return true if a thread is currently running
- */
- public boolean isRunning()
- {
- return _running;
- }
-}
projects / GpsPrune.git / blobdiff