| 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.actions.downloadtasks;
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| 3 |
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| 4 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 5 |
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| 6 | import java.util.ArrayList;
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| 7 | import java.util.LinkedHashSet;
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| 8 | import java.util.List;
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| 9 | import java.util.concurrent.Future;
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| 10 |
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| 11 | import javax.swing.JOptionPane;
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| 12 |
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| 13 | import org.openstreetmap.josm.Main;
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| 14 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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| 15 | import org.openstreetmap.josm.tools.ExceptionUtil;
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| 16 |
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| 17 | public class PostDownloadHandler implements Runnable {
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| 18 | private DownloadTask task;
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| 19 | private List<Future<?>> futures;
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| 20 |
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| 21 | /**
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| 22 | * constructor
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| 23 | * @param task the asynchronous download task
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| 24 | * @param future the future on which the completion of the download task can be synchronized
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| 25 | */
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| 26 | public PostDownloadHandler(DownloadTask task, Future<?> future) {
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| 27 | this.task = task;
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| 28 | this.futures = new ArrayList<Future<?>>();
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| 29 | if (future != null) {
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| 30 | this.futures.add(future);
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| 31 | }
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| 32 | }
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| 33 |
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| 34 | /**
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| 35 | * constructor
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| 36 | * @param task the asynchronous download task
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| 37 | * @param future the future on which the completion of the download task can be synchronized
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| 38 | */
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| 39 | public PostDownloadHandler(DownloadTask task, Future<?> ... futures) {
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| 40 | this.task = task;
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| 41 | this.futures = new ArrayList<Future<?>>();
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| 42 | if (futures == null) return;
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| 43 | for (Future<?> future: futures) {
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| 44 | this.futures.add(future);
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| 45 | }
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| 46 | }
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| 47 |
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| 48 | /**
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| 49 | * constructor
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| 50 | * @param task the asynchronous download task
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| 51 | * @param future the future on which the completion of the download task can be synchronized
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| 52 | */
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| 53 | public PostDownloadHandler(DownloadTask task, List<Future<?>> futures) {
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| 54 | this.task = task;
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| 55 | this.futures = new ArrayList<Future<?>>();
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| 56 | if (futures == null) return;
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| 57 | this.futures.addAll(futures);
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| 58 | }
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| 59 |
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| 60 | public void run() {
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| 61 | // wait for all downloads task to finish (by waiting for the futures
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| 62 | // to return a value)
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| 63 | //
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| 64 | for (Future<?> future: futures) {
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| 65 | try {
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| 66 | future.get();
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| 67 | } catch(Exception e) {
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| 68 | e.printStackTrace();
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| 69 | return;
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| 70 | }
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| 71 | }
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| 72 |
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| 73 | // make sure errors are reported only once
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| 74 | //
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| 75 | LinkedHashSet<Object> errors = new LinkedHashSet<Object>();
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| 76 | errors.addAll(task.getErrorObjects());
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| 77 | if (errors.isEmpty())
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| 78 | return;
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| 79 |
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| 80 | // just one error object?
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| 81 | //
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| 82 | if (errors.size() == 1) {
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| 83 | Object error = errors.iterator().next();
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| 84 | if (error instanceof Exception) {
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| 85 | ExceptionDialogUtil.explainException((Exception)error);
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| 86 | return;
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| 87 | }
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| 88 | JOptionPane.showMessageDialog(
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| 89 | Main.parent,
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| 90 | error.toString(),
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| 91 | tr("Errors during Download"),
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| 92 | JOptionPane.ERROR_MESSAGE);
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| 93 | return;
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| 94 |
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| 95 | }
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| 96 |
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| 97 | // multiple error object? prepare a HTML list
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| 98 | //
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| 99 | if (!errors.isEmpty()) {
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| 100 | StringBuffer sb = new StringBuffer();
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| 101 | for (Object error:errors) {
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| 102 | if (error instanceof String) {
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| 103 | sb.append("<li>").append(error).append("</li>").append("<br>");
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| 104 | } else if (error instanceof Exception) {
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| 105 | sb.append("<li>").append(ExceptionUtil.explainException((Exception)error)).append("</li>").append("<br>");
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| 106 | }
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| 107 | }
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| 108 | sb.insert(0, "<html><ul>");
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| 109 | sb.append("</ul></html>");
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| 110 |
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| 111 | JOptionPane.showMessageDialog(
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| 112 | Main.parent,
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| 113 | sb.toString(),
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| 114 | tr("Errors during download"),
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| 115 | JOptionPane.ERROR_MESSAGE);
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| 116 | return;
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| 117 | }
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| 118 | }
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| 119 | }
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