1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.imagery;
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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.util.ArrayList;
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8 | import java.util.Arrays;
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9 | import java.util.Collection;
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10 | import java.util.Collections;
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11 | import java.util.HashMap;
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12 | import java.util.HashSet;
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13 | import java.util.List;
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14 | import java.util.Map;
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15 | import java.util.Objects;
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16 | import java.util.Set;
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17 | import java.util.TreeSet;
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18 |
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19 | import org.openstreetmap.josm.Main;
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20 | import org.openstreetmap.josm.data.imagery.ImageryInfo.ImageryPreferenceEntry;
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21 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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22 | import org.openstreetmap.josm.io.CachedFile;
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23 | import org.openstreetmap.josm.io.OfflineAccessException;
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24 | import org.openstreetmap.josm.io.OnlineResource;
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25 | import org.openstreetmap.josm.io.imagery.ImageryReader;
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26 | import org.openstreetmap.josm.tools.Utils;
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27 | import org.xml.sax.SAXException;
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28 |
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29 | /**
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30 | * Manages the list of imagery entries that are shown in the imagery menu.
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31 | */
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32 | public class ImageryLayerInfo {
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33 |
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34 | public static final ImageryLayerInfo instance = new ImageryLayerInfo();
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35 | /** List of all usable layers */
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36 | private final List<ImageryInfo> layers = new ArrayList<>();
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37 | /** List of layer ids of all usable layers */
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38 | private final Map<String, ImageryInfo> layerIds = new HashMap<>();
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39 | /** List of all available default layers */
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40 | private static final List<ImageryInfo> defaultLayers = new ArrayList<>();
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41 | /** List of all available default layers (including mirrors) */
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42 | private static final List<ImageryInfo> allDefaultLayers = new ArrayList<>();
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43 | /** List of all layer ids of available default layers (including mirrors) */
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44 | private static final Map<String, ImageryInfo> defaultLayerIds = new HashMap<>();
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45 |
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46 | private static final String[] DEFAULT_LAYER_SITES = {
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47 | Main.getJOSMWebsite()+"/maps"
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48 | };
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49 |
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50 | /**
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51 | * Returns the list of imagery layers sites.
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52 | * @return the list of imagery layers sites
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53 | * @since 7434
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54 | */
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55 | public static Collection<String> getImageryLayersSites() {
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56 | return Main.pref.getCollection("imagery.layers.sites", Arrays.asList(DEFAULT_LAYER_SITES));
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57 | }
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58 |
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59 | private ImageryLayerInfo() {
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60 | }
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61 |
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62 | public ImageryLayerInfo(ImageryLayerInfo info) {
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63 | layers.addAll(info.layers);
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64 | }
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65 |
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66 | public void clear() {
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67 | layers.clear();
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68 | layerIds.clear();
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69 | }
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70 |
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71 | /**
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72 | * Loads the custom as well as default imagery entries.
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73 | * @param fastFail whether opening HTTP connections should fail fast, see {@link ImageryReader#setFastFail(boolean)}
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74 | */
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75 | public void load(boolean fastFail) {
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76 | clear();
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77 | List<ImageryPreferenceEntry> entries = Main.pref.getListOfStructs("imagery.entries", null, ImageryPreferenceEntry.class);
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78 | if (entries != null) {
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79 | for (ImageryPreferenceEntry prefEntry : entries) {
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80 | try {
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81 | ImageryInfo i = new ImageryInfo(prefEntry);
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82 | add(i);
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83 | } catch (IllegalArgumentException e) {
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84 | Main.warn("Unable to load imagery preference entry:"+e);
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85 | }
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86 | }
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87 | Collections.sort(layers);
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88 | }
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89 | loadDefaults(false, true, fastFail);
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90 | }
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91 |
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92 | /**
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93 | * Loads the available imagery entries.
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94 | *
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95 | * The data is downloaded from the JOSM website (or loaded from cache).
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96 | * Entries marked as "default" are added to the user selection, if not
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97 | * already present.
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98 | *
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99 | * @param clearCache if true, clear the cache and start a fresh download.
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100 | * @param quiet whether not the loading should be performed using a {@link PleaseWaitRunnable} in the background
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101 | * @param fastFail whether opening HTTP connections should fail fast, see {@link ImageryReader#setFastFail(boolean)}
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102 | */
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103 | public void loadDefaults(boolean clearCache, boolean quiet, boolean fastFail) {
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104 | final DefaultEntryLoader loader = new DefaultEntryLoader(clearCache, fastFail);
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105 | if (quiet) {
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106 | loader.realRun();
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107 | loader.finish();
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108 | } else {
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109 | Main.worker.execute(new DefaultEntryLoader(clearCache, fastFail));
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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 | * Loader/updater of the available imagery entries
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115 | */
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116 | class DefaultEntryLoader extends PleaseWaitRunnable {
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117 |
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118 | private final boolean clearCache;
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119 | private final boolean fastFail;
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120 | private final List<ImageryInfo> newLayers = new ArrayList<>();
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121 | private ImageryReader reader;
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122 | private boolean canceled;
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123 | private boolean loadError;
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124 |
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125 | DefaultEntryLoader(boolean clearCache, boolean fastFail) {
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126 | super(tr("Update default entries"));
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127 | this.clearCache = clearCache;
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128 | this.fastFail = fastFail;
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129 | }
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130 |
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131 | @Override
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132 | protected void cancel() {
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133 | canceled = true;
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134 | Utils.close(reader);
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135 | }
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136 |
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137 | @Override
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138 | protected void realRun() {
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139 | for (String source : getImageryLayersSites()) {
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140 | if (canceled) {
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141 | return;
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142 | }
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143 | loadSource(source);
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144 | }
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145 | }
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146 |
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147 | protected void loadSource(String source) {
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148 | boolean online = true;
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149 | try {
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150 | OnlineResource.JOSM_WEBSITE.checkOfflineAccess(source, Main.getJOSMWebsite());
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151 | } catch (OfflineAccessException e) {
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152 | Main.warn(e, false);
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153 | online = false;
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154 | }
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155 | if (clearCache && online) {
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156 | CachedFile.cleanup(source);
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157 | }
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158 | try {
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159 | reader = new ImageryReader(source);
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160 | reader.setFastFail(fastFail);
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161 | Collection<ImageryInfo> result = reader.parse();
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162 | newLayers.addAll(result);
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163 | } catch (IOException ex) {
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164 | loadError = true;
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165 | Main.error(ex, false);
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166 | } catch (SAXException ex) {
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167 | loadError = true;
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168 | Main.error(ex);
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169 | }
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170 | }
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171 |
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172 | @Override
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173 | protected void finish() {
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174 | defaultLayers.clear();
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175 | allDefaultLayers.clear();
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176 | defaultLayers.addAll(newLayers);
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177 | for (ImageryInfo layer : newLayers) {
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178 | allDefaultLayers.add(layer);
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179 | for (ImageryInfo sublayer : layer.getMirrors()) {
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180 | allDefaultLayers.add(sublayer);
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181 | }
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182 | }
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183 | defaultLayerIds.clear();
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184 | Collections.sort(defaultLayers);
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185 | Collections.sort(allDefaultLayers);
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186 | buildIdMap(allDefaultLayers, defaultLayerIds);
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187 | updateEntriesFromDefaults(!loadError);
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188 | buildIdMap(layers, layerIds);
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189 | if (!loadError && !defaultLayerIds.isEmpty()) {
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190 | dropOldEntries();
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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 | /**
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196 | * Build the mapping of unique ids to {@link ImageryInfo}s.
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197 | * @param lst input list
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198 | * @param idMap output map
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199 | */
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200 | private static void buildIdMap(List<ImageryInfo> lst, Map<String, ImageryInfo> idMap) {
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201 | idMap.clear();
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202 | Set<String> notUnique = new HashSet<>();
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203 | for (ImageryInfo i : lst) {
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204 | if (i.getId() != null) {
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205 | if (idMap.containsKey(i.getId())) {
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206 | notUnique.add(i.getId());
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207 | Main.error("Id ''{0}'' is not unique - used by ''{1}'' and ''{2}''!",
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208 | i.getId(), i.getName(), idMap.get(i.getId()).getName());
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209 | continue;
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210 | }
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211 | idMap.put(i.getId(), i);
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212 | }
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213 | }
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214 | for (String i : notUnique) {
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215 | idMap.remove(i);
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216 | }
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217 | }
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218 |
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219 | /**
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220 | * Update user entries according to the list of default entries.
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221 | * @param dropold if <code>true</code> old entries should be removed
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222 | * @since 11706
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223 | */
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224 | public void updateEntriesFromDefaults(boolean dropold) {
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225 | // add new default entries to the user selection
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226 | boolean changed = false;
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227 | Collection<String> knownDefaults = new TreeSet<>(Main.pref.getCollection("imagery.layers.default"));
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228 | Collection<String> newKnownDefaults = new TreeSet<>();
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229 | for (ImageryInfo def : defaultLayers) {
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230 | if (def.isDefaultEntry()) {
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231 | boolean isKnownDefault = false;
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232 | for (String entry : knownDefaults) {
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233 | if (entry.equals(def.getId())) {
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234 | isKnownDefault = true;
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235 | newKnownDefaults.add(entry);
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236 | knownDefaults.remove(entry);
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237 | break;
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238 | } else if (isSimilar(entry, def.getUrl())) {
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239 | isKnownDefault = true;
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240 | if (def.getId() != null) {
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241 | newKnownDefaults.add(def.getId());
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242 | }
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243 | knownDefaults.remove(entry);
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244 | break;
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245 | }
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246 | }
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247 | boolean isInUserList = false;
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248 | if (!isKnownDefault) {
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249 | if (def.getId() != null) {
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250 | newKnownDefaults.add(def.getId());
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251 | for (ImageryInfo i : layers) {
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252 | if (isSimilar(def, i)) {
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253 | isInUserList = true;
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254 | break;
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255 | }
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256 | }
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257 | } else {
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258 | Main.error("Default imagery ''{0}'' has no id. Skipping.", def.getName());
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259 | }
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260 | }
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261 | if (!isKnownDefault && !isInUserList) {
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262 | add(new ImageryInfo(def));
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263 | changed = true;
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264 | }
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265 | }
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266 | }
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267 | if (!dropold && !knownDefaults.isEmpty()) {
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268 | newKnownDefaults.addAll(knownDefaults);
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269 | }
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270 | Main.pref.putCollection("imagery.layers.default", newKnownDefaults);
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271 |
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272 | // automatically update user entries with same id as a default entry
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273 | for (int i = 0; i < layers.size(); i++) {
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274 | ImageryInfo info = layers.get(i);
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275 | if (info.getId() == null) {
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276 | continue;
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277 | }
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278 | ImageryInfo matchingDefault = defaultLayerIds.get(info.getId());
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279 | if (matchingDefault != null && !matchingDefault.equalsPref(info)) {
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280 | layers.set(i, matchingDefault);
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281 | Main.info(tr("Update imagery ''{0}''", info.getName()));
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282 | changed = true;
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283 | }
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284 | }
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285 |
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286 | if (changed) {
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287 | save();
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288 | }
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289 | }
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290 |
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291 | /**
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292 | * Drop entries with Id which do no longer exist (removed from defaults).
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293 | * @since 11527
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294 | */
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295 | public void dropOldEntries() {
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296 | List<String> drop = new ArrayList<>();
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297 |
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298 | for (Map.Entry<String, ImageryInfo> info : layerIds.entrySet()) {
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299 | if (!defaultLayerIds.containsKey(info.getKey())) {
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300 | remove(info.getValue());
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301 | drop.add(info.getKey());
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302 | Main.info(tr("Drop old imagery ''{0}''", info.getValue().getName()));
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303 | }
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304 | }
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305 |
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306 | if (!drop.isEmpty()) {
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307 | for (String id : drop) {
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308 | layerIds.remove(id);
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309 | }
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310 | save();
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311 | }
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312 | }
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313 |
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314 | private static boolean isSimilar(ImageryInfo iiA, ImageryInfo iiB) {
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315 | if (iiA == null)
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316 | return false;
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317 | if (!iiA.getImageryType().equals(iiB.getImageryType()))
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318 | return false;
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319 | if (iiA.getId() != null && iiB.getId() != null) return iiA.getId().equals(iiB.getId());
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320 | return isSimilar(iiA.getUrl(), iiB.getUrl());
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321 | }
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322 |
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323 | // some additional checks to respect extended URLs in preferences (legacy workaround)
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324 | private static boolean isSimilar(String a, String b) {
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325 | return Objects.equals(a, b) || (a != null && b != null && !a.isEmpty() && !b.isEmpty() && (a.contains(b) || b.contains(a)));
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326 | }
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327 |
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328 | public void add(ImageryInfo info) {
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329 | layers.add(info);
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330 | }
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331 |
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332 | public void remove(ImageryInfo info) {
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333 | layers.remove(info);
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334 | }
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335 |
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336 | public void save() {
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337 | List<ImageryPreferenceEntry> entries = new ArrayList<>();
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338 | for (ImageryInfo info : layers) {
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339 | entries.add(new ImageryPreferenceEntry(info));
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340 | }
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341 | Main.pref.putListOfStructs("imagery.entries", entries, ImageryPreferenceEntry.class);
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342 | }
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343 |
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344 | /**
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345 | * List of usable layers
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346 | * @return unmodifiable list containing usable layers
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347 | */
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348 | public List<ImageryInfo> getLayers() {
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349 | return Collections.unmodifiableList(layers);
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350 | }
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351 |
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352 | /**
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353 | * List of available default layers
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354 | * @return unmodifiable list containing available default layers
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355 | */
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356 | public List<ImageryInfo> getDefaultLayers() {
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357 | return Collections.unmodifiableList(defaultLayers);
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358 | }
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359 |
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360 | /**
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361 | * List of all available default layers (including mirrors)
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362 | * @return unmodifiable list containing available default layers
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363 | * @since 11570
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364 | */
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365 | public List<ImageryInfo> getAllDefaultLayers() {
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366 | return Collections.unmodifiableList(allDefaultLayers);
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367 | }
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368 |
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369 | public static void addLayer(ImageryInfo info) {
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370 | instance.add(info);
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371 | instance.save();
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372 | }
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373 |
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374 | public static void addLayers(Collection<ImageryInfo> infos) {
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375 | for (ImageryInfo i : infos) {
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376 | instance.add(i);
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377 | }
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378 | instance.save();
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379 | Collections.sort(instance.layers);
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380 | }
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381 |
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382 | /**
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383 | * Get unique id for ImageryInfo.
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384 | *
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385 | * This takes care, that no id is used twice (due to a user error)
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386 | * @param info the ImageryInfo to look up
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387 | * @return null, if there is no id or the id is used twice,
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388 | * the corresponding id otherwise
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389 | */
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390 | public String getUniqueId(ImageryInfo info) {
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391 | if (info.getId() != null && layerIds.get(info.getId()) == info) {
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392 | return info.getId();
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393 | }
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394 | return null;
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395 | }
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396 | }
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