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.Collection;
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8 | import java.util.HashSet;
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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 | import java.util.function.Consumer;
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15 |
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16 | import javax.swing.JOptionPane;
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17 | import javax.swing.SwingUtilities;
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18 |
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19 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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20 | import org.openstreetmap.josm.gui.MainApplication;
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21 | import org.openstreetmap.josm.gui.Notification;
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22 | import org.openstreetmap.josm.gui.util.GuiHelper;
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23 | import org.openstreetmap.josm.tools.Logging;
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24 | import org.openstreetmap.josm.tools.Utils;
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25 |
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26 | /**
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27 | * The post-download handler notifies user of potential errors that occurred.
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28 | * @since 2322
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29 | */
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30 | public class PostDownloadHandler implements Runnable {
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31 | private final DownloadTask task;
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32 | private final Future<?> future;
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33 | private Consumer<Collection<Object>> errorReporter;
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34 |
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35 | private static final Set<String> NO_DATA_ERROR_MESSAGES = new HashSet<>();
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36 |
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37 | /**
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38 | * Creates a new {@link PostDownloadHandler}
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39 | * @param task the asynchronous download task
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40 | * @param future the future on which the completion of the download task can be synchronized
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41 | */
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42 | public PostDownloadHandler(DownloadTask task, Future<?> future) {
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43 | this.task = task;
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44 | this.future = future;
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45 | }
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46 |
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47 | /**
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48 | * Creates a new {@link PostDownloadHandler} using a custom error reporter
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49 | * @param task the asynchronous download task
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50 | * @param future the future on which the completion of the download task can be synchronized
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51 | * @param errorReporter a callback to inform about the number errors happened during the download
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52 | * task
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53 | */
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54 | public PostDownloadHandler(DownloadTask task, Future<?> future, Consumer<Collection<Object>> errorReporter) {
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55 | this(task, future);
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56 | this.errorReporter = errorReporter;
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57 | }
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58 |
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59 | /**
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60 | * Adds a new translated error message indicating that no data has been downloaded.
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61 | * @param message new translated error message indicating that no data has been downloaded.
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62 | * @return {@code true} if the message was not already known
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63 | * @since 15358
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64 | */
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65 | public static boolean addNoDataErrorMessage(String message) {
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66 | return NO_DATA_ERROR_MESSAGES.add(message);
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67 | }
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68 |
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69 | /**
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70 | * Determines if a translated error message indicates that no data has been downloaded.
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71 | * @param message translated error message to check
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72 | * @return {@code true} if the message indicates that no data has been downloaded
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73 | * @since 15358
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74 | */
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75 | public static boolean isNoDataErrorMessage(Object message) {
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76 | return NO_DATA_ERROR_MESSAGES.contains(message);
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77 | }
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78 |
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79 | @Override
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80 | public void run() {
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81 | // wait for downloads task to finish (by waiting for the future to return a value)
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82 | //
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83 | try {
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84 | future.get();
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85 | } catch (InterruptedException | ExecutionException | CancellationException e) {
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86 | Logging.error(e);
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87 | return;
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88 | }
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89 |
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90 | // make sure errors are reported only once
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91 | //
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92 | Set<Object> errors = new LinkedHashSet<>(task.getErrorObjects());
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93 |
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94 | if (this.errorReporter != null) {
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95 | GuiHelper.runInEDT(() -> errorReporter.accept(errors));
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96 | }
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97 |
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98 | if (errors.isEmpty()) {
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99 | return;
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100 | }
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101 |
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102 | // just one error object?
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103 | //
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104 | if (errors.size() == 1) {
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105 | final Object error = errors.iterator().next();
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106 | if (!GraphicsEnvironment.isHeadless()) {
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107 | SwingUtilities.invokeLater(() -> {
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108 | if (error instanceof Exception) {
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109 | ExceptionDialogUtil.explainException((Exception) error);
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110 | } else if (isNoDataErrorMessage(error)) {
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111 | new Notification(error.toString()).setIcon(JOptionPane.WARNING_MESSAGE).show();
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112 | } else {
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113 | JOptionPane.showMessageDialog(
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114 | MainApplication.getMainFrame(),
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115 | error.toString(),
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116 | tr("Error during download"),
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117 | JOptionPane.ERROR_MESSAGE);
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118 | }
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119 | });
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120 | }
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121 | return;
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122 | }
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123 |
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124 | // multiple error object? prepare a HTML list
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125 | //
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126 | final Collection<String> items = task.getErrorMessages();
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127 | if (!items.isEmpty() && !GraphicsEnvironment.isHeadless()) {
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128 | SwingUtilities.invokeLater(() -> JOptionPane.showMessageDialog(
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129 | MainApplication.getMainFrame(),
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130 | "<html>"+Utils.joinAsHtmlUnorderedList(items)+"</html>",
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131 | tr("Errors during download"),
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132 | JOptionPane.ERROR_MESSAGE));
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133 | }
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134 | }
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135 | }
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