1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.io.importexport;
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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.io.File;
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7 | import java.io.IOException;
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8 | import java.util.List;
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9 |
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10 | import javax.swing.JOptionPane;
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11 |
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12 | import org.openstreetmap.josm.Main;
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13 | import org.openstreetmap.josm.actions.ExtensionFileFilter;
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14 | import org.openstreetmap.josm.gui.HelpAwareOptionPane;
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15 | import org.openstreetmap.josm.gui.Notification;
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16 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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17 | import org.openstreetmap.josm.gui.util.GuiHelper;
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18 | import org.openstreetmap.josm.io.IllegalDataException;
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19 | import org.openstreetmap.josm.io.ImportCancelException;
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20 | import org.openstreetmap.josm.tools.Logging;
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21 | import org.openstreetmap.josm.tools.Utils;
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22 | import org.openstreetmap.josm.tools.bugreport.BugReportExceptionHandler;
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23 |
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24 | /**
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25 | * Abstract file importer.
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26 | * @since 1637
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27 | * @since 10386 (signature)
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28 | */
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29 | public abstract class FileImporter implements Comparable<FileImporter> {
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30 |
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31 | /**
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32 | * The extension file filter used to accept files.
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33 | */
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34 | public final ExtensionFileFilter filter;
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35 |
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36 | private boolean enabled;
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37 |
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38 | /**
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39 | * Constructs a new {@code FileImporter} with the given extension file filter.
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40 | * @param filter The extension file filter
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41 | */
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42 | public FileImporter(ExtensionFileFilter filter) {
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43 | this.filter = filter;
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44 | this.enabled = true;
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45 | }
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46 |
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47 | /**
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48 | * Determines if this file importer accepts the given file.
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49 | * @param pathname The file to test
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50 | * @return {@code true} if this file importer accepts the given file, {@code false} otherwise
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51 | */
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52 | public boolean acceptFile(File pathname) {
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53 | return filter.acceptName(pathname.getName());
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54 | }
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55 |
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56 | /**
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57 | * A batch importer is a file importer that prefers to read multiple files at the same time.
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58 | * @return {@code true} if this importer is a batch importer
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59 | */
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60 | public boolean isBatchImporter() {
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61 | return false;
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62 | }
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63 |
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64 | /**
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65 | * Needs to be implemented if isBatchImporter() returns false.
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66 | * @param file file to import
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67 | * @param progressMonitor progress monitor
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68 | * @throws IOException if any I/O error occurs
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69 | * @throws IllegalDataException if invalid data is read
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70 | */
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71 | public void importData(File file, ProgressMonitor progressMonitor) throws IOException, IllegalDataException {
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72 | throw new IOException(tr("Could not import ''{0}''.", file.getName()));
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73 | }
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74 |
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75 | /**
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76 | * Needs to be implemented if isBatchImporter() returns true.
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77 | * @param files files to import
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78 | * @param progressMonitor progress monitor
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79 | * @throws IOException if any I/O error occurs
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80 | * @throws IllegalDataException if invalid data is read
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81 | */
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82 | public void importData(List<File> files, ProgressMonitor progressMonitor) throws IOException, IllegalDataException {
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83 | throw new IOException(tr("Could not import files."));
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84 | }
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85 |
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86 | /**
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87 | * Wrapper to {@link #importData(File, ProgressMonitor)} to give meaningful output if things go wrong.
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88 | * @param f data file to import
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89 | * @param progressMonitor progress monitor
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90 | * @return true if data import was successful
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91 | */
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92 | public boolean importDataHandleExceptions(File f, ProgressMonitor progressMonitor) {
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93 | try {
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94 | Logging.info("Open file: " + f.getAbsolutePath() + " (" + f.length() + " bytes)");
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95 | importData(f, progressMonitor);
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96 | return true;
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97 | } catch (IllegalDataException e) {
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98 | Throwable cause = e.getCause();
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99 | if (cause instanceof ImportCancelException) {
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100 | displayCancel(cause);
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101 | } else {
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102 | displayError(f, e);
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103 | }
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104 | return false;
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105 | } catch (IOException e) {
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106 | displayError(f, e);
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107 | return false;
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108 | } catch (RuntimeException | LinkageError e) { // NOPMD
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109 | BugReportExceptionHandler.handleException(e);
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110 | return false;
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111 | }
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112 | }
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113 |
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114 | private static void displayError(File f, Exception e) {
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115 | Logging.error(e);
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116 | HelpAwareOptionPane.showMessageDialogInEDT(
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117 | Main.parent,
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118 | tr("<html>Could not read file ''{0}''.<br>Error is:<br>{1}</html>",
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119 | f.getName(), Utils.escapeReservedCharactersHTML(e.getMessage())),
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120 | tr("Error"),
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121 | JOptionPane.ERROR_MESSAGE, null
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122 | );
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123 | }
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124 |
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125 | private static void displayCancel(final Throwable t) {
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126 | GuiHelper.runInEDTAndWait(() -> {
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127 | Notification note = new Notification(t.getMessage());
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128 | note.setIcon(JOptionPane.INFORMATION_MESSAGE);
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129 | note.setDuration(Notification.TIME_SHORT);
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130 | note.show();
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131 | });
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132 | }
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133 |
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134 | /**
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135 | * Wrapper to {@link #importData(List, ProgressMonitor)} to give meaningful output if things go wrong.
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136 | * @param files data files to import
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137 | * @param progressMonitor progress monitor
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138 | * @return true if data import was successful
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139 | */
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140 | public boolean importDataHandleExceptions(List<File> files, ProgressMonitor progressMonitor) {
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141 | try {
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142 | Logging.info("Open "+files.size()+" files");
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143 | importData(files, progressMonitor);
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144 | return true;
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145 | } catch (IOException | IllegalDataException e) {
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146 | Logging.error(e);
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147 | HelpAwareOptionPane.showMessageDialogInEDT(
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148 | Main.parent,
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149 | tr("<html>Could not read files.<br>Error is:<br>{0}</html>", Utils.escapeReservedCharactersHTML(e.getMessage())),
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150 | tr("Error"),
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151 | JOptionPane.ERROR_MESSAGE, null
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152 | );
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153 | return false;
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154 | }
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155 | }
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156 |
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157 | /**
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158 | * If multiple files (with multiple file formats) are selected,
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159 | * they are opened in the order of their priorities.
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160 | * Highest priority comes first.
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161 | * @return priority
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162 | */
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163 | public double getPriority() {
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164 | return 0;
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165 | }
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166 |
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167 | @Override
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168 | public int compareTo(FileImporter other) {
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169 | return Double.compare(this.getPriority(), other.getPriority());
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170 | }
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171 |
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172 | /**
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173 | * Returns the enabled state of this {@code FileImporter}. When enabled, it is listed and usable in "File->Open" dialog.
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174 | * @return true if this {@code FileImporter} is enabled
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175 | * @since 5459
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176 | */
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177 | public final boolean isEnabled() {
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178 | return enabled;
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179 | }
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180 |
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181 | /**
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182 | * Sets the enabled state of the {@code FileImporter}. When enabled, it is listed and usable in "File->Open" dialog.
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183 | * @param enabled true to enable this {@code FileImporter}, false to disable it
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184 | * @since 5459
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185 | */
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186 | public final void setEnabled(boolean enabled) {
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187 | this.enabled = enabled;
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188 | }
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189 | }
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