| 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.awt.GraphicsEnvironment;
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| 7 | import java.util.ArrayList;
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| 8 | import java.util.Collection;
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| 9 | import java.util.LinkedHashSet;
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| 10 | import java.util.Set;
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| 11 | import java.util.concurrent.CancellationException;
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| 12 | import java.util.concurrent.ExecutionException;
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| 13 | import java.util.concurrent.Future;
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| 14 |
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| 15 | import javax.swing.JOptionPane;
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| 16 | import javax.swing.SwingUtilities;
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| 17 |
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| 18 | import org.openstreetmap.josm.Main;
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| 19 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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| 20 | import org.openstreetmap.josm.gui.Notification;
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| 21 | import org.openstreetmap.josm.tools.ExceptionUtil;
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| 22 | import org.openstreetmap.josm.tools.Utils;
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| 23 |
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| 24 | /**
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| 25 | * The post-download handler notifies user of potential errors that occurred.
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| 26 | * @since 2322
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| 27 | */
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| 28 | public class PostDownloadHandler implements Runnable {
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| 29 | private final DownloadTask task;
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| 30 | private final Future<?> future;
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| 31 |
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| 32 | /**
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| 33 | * constructor
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| 34 | * @param task the asynchronous download task
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| 35 | * @param future the future on which the completion of the download task can be synchronized
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| 36 | */
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| 37 | public PostDownloadHandler(DownloadTask task, Future<?> future) {
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| 38 | this.task = task;
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| 39 | this.future = future;
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| 40 | }
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| 41 |
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| 42 | @Override
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| 43 | public void run() {
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| 44 | // wait for downloads task to finish (by waiting for the future to return a value)
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| 45 | //
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| 46 | try {
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| 47 | future.get();
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| 48 | } catch (InterruptedException | ExecutionException | CancellationException e) {
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| 49 | Main.error(e);
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| 50 | return;
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| 51 | }
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| 52 |
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| 53 | // make sure errors are reported only once
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| 54 | //
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| 55 | Set<Object> errors = new LinkedHashSet<>(task.getErrorObjects());
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| 56 | if (errors.isEmpty())
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| 57 | return;
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| 58 |
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| 59 | // just one error object?
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| 60 | //
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| 61 | if (errors.size() == 1) {
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| 62 | final Object error = errors.iterator().next();
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| 63 | if (!GraphicsEnvironment.isHeadless()) {
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| 64 | SwingUtilities.invokeLater(() -> {
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| 65 | if (error instanceof Exception) {
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| 66 | ExceptionDialogUtil.explainException((Exception) error);
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| 67 | } else if (tr("No data found in this area.").equals(error)) {
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| 68 | new Notification(error.toString()).setIcon(JOptionPane.WARNING_MESSAGE).show();
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| 69 | } else {
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| 70 | JOptionPane.showMessageDialog(
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| 71 | Main.parent,
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| 72 | error.toString(),
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| 73 | tr("Error during download"),
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| 74 | JOptionPane.ERROR_MESSAGE);
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| 75 | }
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| 76 | });
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| 77 | }
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| 78 | return;
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| 79 | }
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| 80 |
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| 81 | // multiple error object? prepare a HTML list
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| 82 | //
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| 83 | if (!errors.isEmpty()) {
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| 84 | final Collection<String> items = new ArrayList<>();
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| 85 | for (Object error : errors) {
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| 86 | if (error instanceof String) {
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| 87 | items.add((String) error);
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| 88 | } else if (error instanceof Exception) {
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| 89 | items.add(ExceptionUtil.explainException((Exception) error));
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| 90 | }
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| 91 | }
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| 92 |
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| 93 | if (!GraphicsEnvironment.isHeadless()) {
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| 94 | SwingUtilities.invokeLater(() -> JOptionPane.showMessageDialog(
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| 95 | Main.parent,
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| 96 | "<html>"+Utils.joinAsHtmlUnorderedList(items)+"</html>",
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| 97 | tr("Errors during download"),
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| 98 | JOptionPane.ERROR_MESSAGE));
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| 99 | }
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| 100 | return;
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| 101 | }
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| 102 | }
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| 103 | }
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