1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui;
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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.IOException;
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7 | import java.net.HttpURLConnection;
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8 | import java.net.MalformedURLException;
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9 | import java.net.SocketException;
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10 | import java.net.URL;
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11 | import java.net.UnknownHostException;
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12 |
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13 | import javax.swing.JOptionPane;
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14 |
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15 | import org.openstreetmap.josm.Main;
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16 | import org.openstreetmap.josm.io.OsmApi;
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17 | import org.openstreetmap.josm.io.OsmApiException;
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18 | import org.openstreetmap.josm.io.OsmApiInitializationException;
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19 | import org.openstreetmap.josm.io.OsmChangesetCloseException;
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20 | import org.openstreetmap.josm.io.OsmTransferException;
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21 |
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22 | /**
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23 | * This utility class provides static methods which explain various exceptions to the user.
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24 | *
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25 | */
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26 | public class ExceptionDialogUtil {
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27 |
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28 | /**
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29 | * just static utility functions. no constructor
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30 | */
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31 | private ExceptionDialogUtil() {}
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32 |
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33 | /**
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34 | * handles an exception caught during OSM API initialization
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35 | *
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36 | * @param e the exception
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37 | */
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38 | public static void explainOsmApiInitializationException(OsmApiInitializationException e) {
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39 | e.printStackTrace();
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40 | JOptionPane.showMessageDialog(
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41 | Main.parent,
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42 | tr( "<html>Failed to initialize communication with the OSM server {0}.<br>"
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43 | + "Check the server URL in your preferences and your internet connection.</html>",
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44 | Main.pref.get("osm-server.url", "http://api.openstreetmap.org/api")
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45 | ),
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46 | tr("Error"),
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47 | JOptionPane.ERROR_MESSAGE
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48 | );
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49 | }
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50 |
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51 | /**
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52 | * handles an exception caught during OSM API initialization
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53 | *
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54 | * @param e the exception
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55 | */
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56 | public static void explainOsmChangesetCloseException(OsmChangesetCloseException e) {
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57 | e.printStackTrace();
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58 | String changsetId = e.getChangeset() == null ? tr("unknown") : Long.toString(e.getChangeset().getId());
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59 | JOptionPane.showMessageDialog(
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60 | Main.parent,
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61 | tr( "<html>Failed to close changeset ''{0}'' on the OSM server ''{1}''.<br>"
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62 | + "The changeset will automatically be closed by the server after a timeout.</html>",
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63 | changsetId,
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64 | Main.pref.get("osm-server.url", "http://api.openstreetmap.org/api")
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65 | ),
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66 | tr("Error"),
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67 | JOptionPane.ERROR_MESSAGE
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68 | );
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69 | }
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70 |
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71 |
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72 | /**
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73 | * Explains an upload error due to a violated precondition, i.e. a HTTP return code 412
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74 | *
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75 | * @param e the exception
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76 | */
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77 | public static void explainPreconditionFailed(OsmApiException e) {
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78 | e.printStackTrace();
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79 | JOptionPane.showMessageDialog(
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80 | Main.parent,
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81 | tr("<html>Uploading to the server <strong>failed</strong> because your current<br>"
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82 | +"dataset violates a precondition.<br>"
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83 | +"The error message is:<br>"
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84 | + "{0}"
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85 | + "</html>",
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86 | e.getMessage().replace("&", "&").replace("<", "<").replace(">", ">")
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87 | ),
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88 | tr("Precondition violation"),
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89 | JOptionPane.ERROR_MESSAGE
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90 | );
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91 | }
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92 |
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93 |
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94 | /**
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95 | * Explains an exception with a generic message dialog
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96 | *
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97 | * @param e the exception
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98 | */
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99 | public static void explainGeneric(Exception e) {
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100 | String msg = e.getMessage();
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101 | if (msg == null || msg.trim().equals("")) {
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102 | msg = e.toString();
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103 | }
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104 | e.printStackTrace();
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105 | JOptionPane.showMessageDialog(
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106 | Main.parent,
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107 | msg,
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108 | tr("Error"),
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109 | JOptionPane.ERROR_MESSAGE
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110 | );
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111 | }
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112 |
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113 | /**
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114 | * Explains a {@see SecurityException} which has caused an {@see OsmTransferException}.
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115 | * This is most likely happening when user tries to access the OSM API from within an
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116 | * applet which wasn't loaded from the API server.
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117 | *
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118 | * @param e the exception
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119 | */
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120 |
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121 | public static void explainSecurityException(OsmTransferException e) {
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122 | String apiUrl = OsmApi.getOsmApi().getBaseUrl();
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123 | String host = tr("unknown");
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124 | try {
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125 | host = new URL(apiUrl).getHost();
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126 | } catch(MalformedURLException ex) {
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127 | // shouldn't happen
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128 | }
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129 |
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130 | String message = tr("<html>Failed to open a connection to the remote server<br>"
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131 | + "''{0}''<br>"
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132 | + "for security reasons. This is most likely because you are running<br>"
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133 | + "in an applet and because you didn''t load your applet from ''{1}''.</html>",
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134 | apiUrl, host
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135 | );
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136 | JOptionPane.showMessageDialog(
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137 | Main.parent,
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138 | message,
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139 | tr("Security exception"),
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140 | JOptionPane.ERROR_MESSAGE
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141 | );
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142 | }
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143 |
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144 | /**
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145 | * Explains a {@see SocketException} which has caused an {@see OsmTransferException}.
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146 | * This is most likely because there's not connection to the Internet or because
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147 | * the remote server is not reachable.
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148 | *
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149 | * @param e the exception
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150 | */
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151 |
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152 | public static void explainNestedSocketException(OsmTransferException e) {
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153 | String apiUrl = OsmApi.getOsmApi().getBaseUrl();
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154 | String message = tr("<html>Failed to open a connection to the remote server<br>"
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155 | + "''{0}''.<br>"
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156 | + "Please check your internet connection.</html>",
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157 | apiUrl
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158 | );
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159 | e.printStackTrace();
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160 | JOptionPane.showMessageDialog(
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161 | Main.parent,
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162 | message,
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163 | tr("Network exception"),
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164 | JOptionPane.ERROR_MESSAGE
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165 | );
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166 | }
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167 |
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168 | /**
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169 | * Explains a {@see IOException} which has caused an {@see OsmTransferException}.
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170 | * This is most likely happening when the communication with the remote server is
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171 | * interrupted for any reason.
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172 | *
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173 | * @param e the exception
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174 | */
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175 |
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176 | public static void explainNestedIOException(OsmTransferException e) {
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177 | IOException ioe = getNestedException(e, IOException.class);
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178 | String apiUrl = OsmApi.getOsmApi().getBaseUrl();
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179 | String message = tr("<html>Failed to upload data to or download data from<br>"
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180 | + "''{0}''<br>"
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181 | + "due to a problem with transferring data.<br>"
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182 | + "Details(untranslated): {1}</html>",
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183 | apiUrl, ioe.getMessage()
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184 | );
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185 | e.printStackTrace();
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186 | JOptionPane.showMessageDialog(
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187 | Main.parent,
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188 | message,
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189 | tr("IO Exception"),
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190 | JOptionPane.ERROR_MESSAGE
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191 | );
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192 | }
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193 |
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194 | /**
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195 | * Explains a {@see OsmApiException} which was thrown because of an internal server
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196 | * error in the OSM API server..
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197 | *
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198 | * @param e the exception
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199 | */
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200 |
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201 | public static void explainInternalServerError(OsmTransferException e) {
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202 | String apiUrl = OsmApi.getOsmApi().getBaseUrl();
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203 | String message = tr("<html>The OSM server<br>"
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204 | + "''{0}''<br>"
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205 | + "reported an internal server error.<br>"
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206 | + "This is most likely a temporary problem. Please try again later.</html>",
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207 | apiUrl
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208 | );
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209 | e.printStackTrace();
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210 | JOptionPane.showMessageDialog(
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211 | Main.parent,
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212 | message,
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213 | tr("Internal Server Error"),
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214 | JOptionPane.ERROR_MESSAGE
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215 | );
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216 | }
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217 |
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218 | /**
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219 | * Explains a {@see UnknownHostException} which has caused an {@see OsmTransferException}.
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220 | * This is most likely happening when there is an error in the API URL or when
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221 | * local DNS services are not working.
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222 | *
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223 | * @param e the exception
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224 | */
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225 |
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226 | public static void explainNestedUnkonwnHostException(OsmTransferException e) {
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227 | String apiUrl = OsmApi.getOsmApi().getBaseUrl();
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228 | String host = tr("unknown");
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229 | try {
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230 | host = new URL(apiUrl).getHost();
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231 | } catch(MalformedURLException ex) {
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232 | // shouldn't happen
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233 | }
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234 |
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235 | String message = tr("<html>Failed to open a connection to the remote server<br>"
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236 | + "''{0}''.<br>"
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237 | + "Host name ''{1}'' couldn''t be resolved. <br>"
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238 | + "Please check the API URL in your preferences and your internet connection.</html>",
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239 | apiUrl, host
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240 | );
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241 | e.printStackTrace();
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242 | JOptionPane.showMessageDialog(
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243 | Main.parent,
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244 | message,
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245 | tr("Unknown host"),
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246 | JOptionPane.ERROR_MESSAGE
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247 | );
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248 | }
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249 |
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250 | /**
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251 | * Replies the first nested exception of type <code>nestedClass</code> (including
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252 | * the root exception <code>e</code>) or null, if no such exception is found.
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253 | *
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254 | * @param <T>
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255 | * @param e the root exception
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256 | * @param nestedClass the type of the nested exception
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257 | * @return the first nested exception of type <code>nestedClass</code> (including
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258 | * the root exception <code>e</code>) or null, if no such exception is found.
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259 | */
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260 | protected static <T> T getNestedException(Exception e, Class<T> nestedClass) {
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261 | Throwable t = e;
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262 | while (t != null && !(nestedClass.isInstance(t))) {
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263 | t = t.getCause();
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264 | }
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265 | if (t== null)
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266 | return null;
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267 | else if (nestedClass.isInstance(t))
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268 | return nestedClass.cast(t);
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269 | return null;
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270 | }
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271 |
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272 | /**
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273 | * Explains an {@see OsmTransferException} to the user.
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274 | *
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275 | * @param e the {@see OsmTransferException}
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276 | */
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277 | public static void explainOsmTransferException(OsmTransferException e) {
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278 | if (getNestedException(e, SecurityException.class) != null) {
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279 | explainSecurityException(e);
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280 | return;
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281 | }
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282 | if (getNestedException(e, SocketException.class) != null) {
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283 | explainNestedSocketException(e);
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284 | return;
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285 | }
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286 | if (getNestedException(e, UnknownHostException.class) != null) {
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287 | explainNestedUnkonwnHostException(e);
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288 | return;
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289 | }
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290 | if (getNestedException(e, IOException.class) != null) {
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291 | explainNestedIOException(e);
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292 | return;
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293 | }
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294 | if (e instanceof OsmApiInitializationException){
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295 | explainOsmApiInitializationException((OsmApiInitializationException)e);
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296 | return;
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297 | }
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298 | if (e instanceof OsmChangesetCloseException){
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299 | explainOsmChangesetCloseException((OsmChangesetCloseException)e);
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300 | return;
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301 | }
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302 |
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303 | if (e instanceof OsmApiException) {
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304 | OsmApiException oae = (OsmApiException)e;
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305 | if (oae.getResponseCode() == HttpURLConnection.HTTP_PRECON_FAILED) {
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306 | explainPreconditionFailed(oae);
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307 | return;
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308 | }
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309 | if (oae.getResponseCode() == HttpURLConnection.HTTP_GONE) {
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310 | explainGoneForUnknownPrimitive(oae);
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311 | return;
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312 | }
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313 | if (oae.getResponseCode() == HttpURLConnection.HTTP_INTERNAL_ERROR) {
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314 | explainInternalServerError(oae);
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315 | return;
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316 | }
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317 | }
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318 | explainGeneric(e);
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319 | }
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320 |
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321 | /**
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322 | * explains the case of an error due to a delete request on an already deleted
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323 | * {@see OsmPrimitive}, i.e. a HTTP response code 410, where we don't know which
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324 | * {@see OsmPrimitive} is causing the error.
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325 | *
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326 | * @param e the exception
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327 | */
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328 | public static void explainGoneForUnknownPrimitive(OsmApiException e) {
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329 | String msg = tr("<html>Uploading <strong>failed</strong> because a primitive you tried to<br>"
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330 | + "delete on the server is already deleted.<br>"
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331 | + "<br>"
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332 | + "The error message is:<br>"
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333 | + "{0}"
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334 | + "</html>",
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335 | e.getMessage().replace("&", "&").replace("<", "<").replace(">", ">")
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336 | );
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337 | JOptionPane.showMessageDialog(
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338 | Main.parent,
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339 | msg,
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340 | tr("Primitive already deleted"),
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341 | JOptionPane.ERROR_MESSAGE
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342 | );
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343 |
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344 | }
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345 |
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346 | /**
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347 | * Explains an {@see Exception} to the user.
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348 | *
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349 | * @param e the {@see Exception}
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350 | */
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351 | public static void explainException(Exception e) {
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352 | if (e instanceof OsmTransferException) {
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353 | explainOsmTransferException((OsmTransferException)e);
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354 | return;
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355 | }
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356 | explainGeneric(e);
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357 | }
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358 | }
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