1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.io;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 | import static org.openstreetmap.josm.tools.I18n.trn;
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6 |
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7 | import java.io.IOException;
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8 | import java.io.InputStream;
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9 | import java.text.MessageFormat;
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10 | import java.util.ArrayList;
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11 | import java.util.Collection;
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12 | import java.util.Collections;
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13 | import java.util.List;
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14 |
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15 | import org.openstreetmap.josm.Main;
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16 | import org.openstreetmap.josm.data.osm.Changeset;
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17 | import org.openstreetmap.josm.data.osm.ChangesetDataSet;
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18 | import org.openstreetmap.josm.data.osm.DataSet;
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19 | import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
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20 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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21 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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22 | import org.openstreetmap.josm.tools.XmlParsingException;
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23 |
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24 | /**
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25 | * Reads the history of an {@link org.openstreetmap.josm.data.osm.OsmPrimitive} from the OSM API server.
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26 | *
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27 | */
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28 | public class OsmServerChangesetReader extends OsmServerReader {
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29 |
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30 | /**
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31 | * Constructs a new {@code OsmServerChangesetReader}.
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32 | */
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33 | public OsmServerChangesetReader() {
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34 | setDoAuthenticate(false);
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35 | }
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36 |
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37 | /**
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38 | * don't use - not implemented!
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39 | */
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40 | @Override
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41 | public DataSet parseOsm(ProgressMonitor progressMonitor) throws OsmTransferException {
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42 | return null;
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43 | }
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44 |
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45 | protected final InputStream getChangesetInputStream(long id, boolean includeDiscussion, ProgressMonitor monitor)
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46 | throws OsmTransferException {
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47 | StringBuilder sb = new StringBuilder();
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48 | sb.append("changeset/").append(id);
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49 | if (includeDiscussion) {
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50 | sb.append("?include_discussion=true");
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51 | }
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52 | return getInputStream(sb.toString(), monitor.createSubTaskMonitor(1, true));
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53 | }
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54 |
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55 | /**
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56 | * Queries a list
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57 | * @param query the query specification. Must not be null.
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58 | * @param monitor a progress monitor. Set to {@link NullProgressMonitor#INSTANCE} if null
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59 | * @return the list of changesets read from the server
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60 | * @throws IllegalArgumentException if query is null
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61 | * @throws OsmTransferException if something goes wrong w
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62 | */
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63 | public List<Changeset> queryChangesets(ChangesetQuery query, ProgressMonitor monitor) throws OsmTransferException {
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64 | CheckParameterUtil.ensureParameterNotNull(query, "query");
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65 | List<Changeset> result = null;
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66 | if (monitor == null) {
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67 | monitor = NullProgressMonitor.INSTANCE;
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68 | }
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69 | try {
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70 | monitor.beginTask(tr("Reading changesets..."));
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71 | StringBuilder sb = new StringBuilder();
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72 | sb.append("changesets?").append(query.getQueryString());
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73 | try (InputStream in = getInputStream(sb.toString(), monitor.createSubTaskMonitor(1, true))) {
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74 | if (in == null)
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75 | return Collections.emptyList();
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76 | monitor.indeterminateSubTask(tr("Downloading changesets ..."));
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77 | result = OsmChangesetParser.parse(in, monitor.createSubTaskMonitor(1, true));
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78 | } catch (IOException e) {
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79 | Main.warn(e);
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80 | }
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81 | } catch (OsmTransferException e) {
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82 | throw e;
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83 | } catch (IllegalDataException e) {
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84 | throw new OsmTransferException(e);
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85 | } finally {
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86 | monitor.finishTask();
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87 | }
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88 | return result;
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89 | }
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90 |
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91 | /**
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92 | * Reads the changeset with id <code>id</code> from the server.
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93 | *
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94 | * @param id the changeset id. id > 0 required.
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95 | * @param includeDiscussion determines if discussion comments must be downloaded or not
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96 | * @param monitor the progress monitor. Set to {@link NullProgressMonitor#INSTANCE} if null
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97 | * @return the changeset read
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98 | * @throws OsmTransferException if something goes wrong
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99 | * @throws IllegalArgumentException if id <= 0
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100 | * @since 7704
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101 | */
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102 | public Changeset readChangeset(long id, boolean includeDiscussion, ProgressMonitor monitor) throws OsmTransferException {
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103 | if (id <= 0)
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104 | throw new IllegalArgumentException(MessageFormat.format("Parameter ''{0}'' > 0 expected. Got ''{1}''.", "id", id));
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105 | if (monitor == null) {
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106 | monitor = NullProgressMonitor.INSTANCE;
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107 | }
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108 | Changeset result = null;
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109 | try {
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110 | monitor.beginTask(tr("Reading changeset {0} ...", id));
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111 | try (InputStream in = getChangesetInputStream(id, includeDiscussion, monitor)) {
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112 | if (in == null)
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113 | return null;
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114 | monitor.indeterminateSubTask(tr("Downloading changeset {0} ...", id));
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115 | List<Changeset> changesets = OsmChangesetParser.parse(in, monitor.createSubTaskMonitor(1, true));
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116 | if (changesets == null || changesets.isEmpty())
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117 | return null;
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118 | result = changesets.get(0);
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119 | } catch (IOException e) {
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120 | Main.warn(e);
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121 | }
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122 | } catch (OsmTransferException e) {
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123 | throw e;
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124 | } catch (IllegalDataException e) {
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125 | throw new OsmTransferException(e);
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126 | } finally {
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127 | monitor.finishTask();
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128 | }
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129 | return result;
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130 | }
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131 |
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132 | /**
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133 | * Reads the changesets with id <code>ids</code> from the server.
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134 | *
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135 | * @param ids the list of ids. Ignored if null. Only load changesets for ids > 0.
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136 | * @param includeDiscussion determines if discussion comments must be downloaded or not
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137 | * @param monitor the progress monitor. Set to {@link NullProgressMonitor#INSTANCE} if null
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138 | * @return the changeset read
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139 | * @throws OsmTransferException if something goes wrong
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140 | * @throws IllegalArgumentException if id <= 0
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141 | * @since 7704
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142 | */
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143 | public List<Changeset> readChangesets(Collection<Integer> ids, boolean includeDiscussion, ProgressMonitor monitor)
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144 | throws OsmTransferException {
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145 | if (ids == null)
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146 | return Collections.emptyList();
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147 | if (monitor == null) {
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148 | monitor = NullProgressMonitor.INSTANCE;
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149 | }
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150 | try {
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151 | monitor.beginTask(trn("Downloading {0} changeset ...", "Downloading {0} changesets ...", ids.size(), ids.size()));
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152 | monitor.setTicksCount(ids.size());
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153 | List<Changeset> ret = new ArrayList<>();
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154 | int i = 0;
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155 | for (int id : ids) {
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156 | if (id <= 0) {
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157 | continue;
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158 | }
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159 | i++;
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160 | try (InputStream in = getChangesetInputStream(id, includeDiscussion, monitor)) {
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161 | if (in == null)
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162 | return null;
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163 | monitor.indeterminateSubTask(tr("({0}/{1}) Downloading changeset {2} ...", i, ids.size(), id));
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164 | List<Changeset> changesets = OsmChangesetParser.parse(in, monitor.createSubTaskMonitor(1, true));
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165 | if (changesets == null || changesets.isEmpty()) {
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166 | continue;
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167 | }
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168 | ret.addAll(changesets);
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169 | } catch (IOException e) {
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170 | Main.warn(e);
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171 | }
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172 | monitor.worked(1);
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173 | }
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174 | return ret;
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175 | } catch (OsmTransferException e) {
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176 | throw e;
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177 | } catch (IllegalDataException e) {
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178 | throw new OsmTransferException(e);
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179 | } finally {
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180 | monitor.finishTask();
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181 | }
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182 | }
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183 |
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184 | /**
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185 | * Downloads the content of a changeset
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186 | *
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187 | * @param id the changeset id. > 0 required.
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188 | * @param monitor the progress monitor. {@link NullProgressMonitor#INSTANCE} assumed if null.
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189 | * @return the changeset content
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190 | * @throws IllegalArgumentException if id <= 0
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191 | * @throws OsmTransferException if something went wrong
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192 | */
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193 | public ChangesetDataSet downloadChangeset(int id, ProgressMonitor monitor) throws OsmTransferException {
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194 | if (id <= 0)
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195 | throw new IllegalArgumentException(
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196 | MessageFormat.format("Expected value of type integer > 0 for parameter ''{0}'', got {1}", "id", id));
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197 | if (monitor == null) {
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198 | monitor = NullProgressMonitor.INSTANCE;
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199 | }
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200 | ChangesetDataSet result = null;
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201 | try {
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202 | monitor.beginTask(tr("Downloading changeset content"));
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203 | StringBuilder sb = new StringBuilder();
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204 | sb.append("changeset/").append(id).append("/download");
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205 | try (InputStream in = getInputStream(sb.toString(), monitor.createSubTaskMonitor(1, true))) {
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206 | if (in == null)
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207 | return null;
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208 | monitor.setCustomText(tr("Downloading content for changeset {0} ...", id));
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209 | OsmChangesetContentParser parser = new OsmChangesetContentParser(in);
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210 | result = parser.parse(monitor.createSubTaskMonitor(1, true));
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211 | } catch (IOException e) {
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212 | Main.warn(e);
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213 | }
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214 | } catch (XmlParsingException e) {
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215 | throw new OsmTransferException(e);
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216 | } finally {
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217 | monitor.finishTask();
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218 | }
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219 | return result;
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220 | }
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221 | }
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