1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.history;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.marktr;
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5 | import static org.openstreetmap.josm.tools.I18n.tr;
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6 |
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7 | import java.awt.Component;
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8 | import java.io.IOException;
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9 | import java.text.MessageFormat;
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10 | import java.util.Collection;
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11 | import java.util.HashSet;
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12 | import java.util.Set;
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13 |
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14 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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15 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
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16 | import org.openstreetmap.josm.data.osm.PrimitiveId;
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17 | import org.openstreetmap.josm.data.osm.SimplePrimitiveId;
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18 | import org.openstreetmap.josm.data.osm.history.History;
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19 | import org.openstreetmap.josm.data.osm.history.HistoryDataSet;
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20 | import org.openstreetmap.josm.data.osm.history.HistoryOsmPrimitive;
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21 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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22 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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23 | import org.openstreetmap.josm.io.OsmServerHistoryReader;
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24 | import org.openstreetmap.josm.io.OsmTransferException;
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25 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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26 | import org.xml.sax.SAXException;
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27 |
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28 | /**
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29 | * Loads the object history of an collection of objects from the
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30 | * server.
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31 | *
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32 | * It provides a fluent API for configuration.
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33 | *
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34 | * Sample usage:
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35 | *
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36 | * <pre>
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37 | * HistoryLoadTask task = new HistoryLoadTask()
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38 | * .add(1, OsmPrimitiveType.NODE)
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39 | * .add(1233, OsmPrimitiveType.WAY)
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40 | * .add(37234, OsmPrimitveType.RELATION)
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41 | * .add(aHistoryItem);
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42 | *
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43 | * Main.worker.execute(task);
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44 | *
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45 | * </pre>
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46 | */
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47 | public class HistoryLoadTask extends PleaseWaitRunnable {
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48 |
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49 | private boolean canceled = false;
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50 | private Exception lastException = null;
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51 | private Set<PrimitiveId> toLoad;
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52 | private HistoryDataSet loadedData;
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53 | private OsmServerHistoryReader reader = null;
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54 |
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55 | public HistoryLoadTask() {
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56 | super(tr("Load history"), true);
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57 | toLoad = new HashSet<PrimitiveId>();
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58 | }
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59 |
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60 | /**
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61 | * Creates a new task
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62 | *
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63 | * @param parent the component to be used as reference to find the
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64 | * parent for {@link org.openstreetmap.josm.gui.PleaseWaitDialog}.
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65 | * Must not be <code>null</code>.
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66 | * @throws IllegalArgumentException thrown if parent is <code>null</code>
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67 | */
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68 | public HistoryLoadTask(Component parent) {
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69 | super(parent, tr("Load history"), true);
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70 | CheckParameterUtil.ensureParameterNotNull(parent, "parent");
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71 | toLoad = new HashSet<PrimitiveId>();
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72 | }
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73 |
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74 | /**
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75 | * Adds an object whose history is to be loaded.
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76 | *
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77 | * @param id the object id
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78 | * @param type the object type
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79 | * @return this task
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80 | */
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81 | public HistoryLoadTask add(long id, OsmPrimitiveType type) throws IllegalArgumentException {
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82 | if (id <= 0)
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83 | throw new IllegalArgumentException(MessageFormat.format("Parameter ''{0}'' > 0 expected. Got {1}.", "id", id));
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84 | CheckParameterUtil.ensureParameterNotNull(type, "type");
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85 | SimplePrimitiveId pid = new SimplePrimitiveId(id, type);
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86 | toLoad.add(pid);
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87 | return this;
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88 | }
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89 |
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90 | /**
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91 | * Adds an object whose history is to be loaded.
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92 | *
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93 | * @param pid the primitive id. Must not be null. Id > 0 required.
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94 | * @return this task
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95 | */
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96 | public HistoryLoadTask add(PrimitiveId pid) {
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97 | CheckParameterUtil.ensureValidPrimitiveId(pid, "pid");
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98 | toLoad.add(pid);
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99 | return this;
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100 | }
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101 |
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102 | /**
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103 | * Adds an object to be loaded, the object is specified by a history item.
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104 | *
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105 | * @param primitive the history item
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106 | * @return this task
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107 | * @throws IllegalArgumentException thrown if primitive is null
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108 | */
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109 | public HistoryLoadTask add(HistoryOsmPrimitive primitive) {
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110 | CheckParameterUtil.ensureParameterNotNull(primitive, "primitive");
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111 | toLoad.add(primitive.getPrimitiveId());
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112 | return this;
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113 | }
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114 |
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115 | /**
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116 | * Adds an object to be loaded, the object is specified by an already loaded object history.
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117 | *
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118 | * @param history the history. Must not be null.
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119 | * @return this task
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120 | * @throws IllegalArgumentException thrown if history is null
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121 | */
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122 | public HistoryLoadTask add(History history) {
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123 | CheckParameterUtil.ensureParameterNotNull(history, "history");
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124 | toLoad.add(history.getPrimitiveId());
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125 | return this;
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126 | }
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127 |
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128 | /**
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129 | * Adds an object to be loaded, the object is specified by an OSM primitive.
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130 | *
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131 | * @param primitive the OSM primitive. Must not be null. primitive.getId() > 0 required.
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132 | * @return this task
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133 | * @throws IllegalArgumentException thrown if the primitive is null
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134 | * @throws IllegalArgumentException thrown if primitive.getId() <= 0
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135 | */
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136 | public HistoryLoadTask add(OsmPrimitive primitive) {
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137 | CheckParameterUtil.ensureValidPrimitiveId(primitive, "primitive");
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138 | toLoad.add(primitive.getPrimitiveId());
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139 | return this;
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140 | }
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141 |
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142 | /**
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143 | * Adds a collection of objects to loaded, specified by a collection of OSM primitives.
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144 | *
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145 | * @param primitives the OSM primitives. Must not be <code>null</code>.
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146 | * <code>primitive.getId() > 0</code> required.
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147 | * @return this task
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148 | * @throws IllegalArgumentException thrown if primitives is <code>null</code>
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149 | * @throws IllegalArgumentException thrown if one of the ids in the collection <= 0
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150 | */
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151 | public HistoryLoadTask add(Collection<? extends OsmPrimitive> primitives) {
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152 | CheckParameterUtil.ensureParameterNotNull(primitives, "primitives");
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153 | for (OsmPrimitive primitive: primitives) {
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154 | if (primitive == null) {
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155 | continue;
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156 | }
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157 | add(primitive);
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158 | }
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159 | return this;
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160 | }
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161 |
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162 | @Override
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163 | protected void cancel() {
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164 | if (reader != null) {
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165 | reader.cancel();
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166 | }
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167 | canceled = true;
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168 | }
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169 |
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170 | @Override
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171 | protected void finish() {
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172 | if (isCanceled())
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173 | return;
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174 | if (lastException != null) {
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175 | ExceptionDialogUtil.explainException(lastException);
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176 | return;
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177 | }
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178 | HistoryDataSet.getInstance().mergeInto(loadedData);
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179 | }
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180 |
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181 | @Override
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182 | protected void realRun() throws SAXException, IOException, OsmTransferException {
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183 | loadedData = new HistoryDataSet();
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184 | try {
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185 | progressMonitor.setTicksCount(toLoad.size());
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186 | for(PrimitiveId pid: toLoad) {
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187 | if (canceled) {
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188 | break;
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189 | }
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190 | String msg = "";
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191 | switch(pid.getType()) {
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192 | case NODE: msg = marktr("Loading history for node {0}"); break;
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193 | case WAY: msg = marktr("Loading history for way {0}"); break;
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194 | case RELATION: msg = marktr("Loading history for relation {0}"); break;
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195 | }
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196 | progressMonitor.indeterminateSubTask(tr(msg,
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197 | Long.toString(pid.getUniqueId())));
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198 | reader = null;
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199 | HistoryDataSet ds = null;
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200 | try {
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201 | reader = new OsmServerHistoryReader(pid.getType(), pid.getUniqueId());
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202 | ds = reader.parseHistory(progressMonitor.createSubTaskMonitor(1, false));
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203 | } catch(OsmTransferException e) {
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204 | if (canceled)
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205 | return;
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206 | throw e;
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207 | }
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208 | loadedData.mergeInto(ds);
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209 | }
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210 | } catch(OsmTransferException e) {
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211 | lastException = e;
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212 | return;
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213 | }
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214 | }
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215 |
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216 | public boolean isCanceled() {
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217 | return canceled;
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218 | }
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219 |
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220 | public Exception getLastException() {
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221 | return lastException;
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222 | }
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223 | }
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