1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.osm;
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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.util.ArrayList;
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7 | import java.util.Collection;
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8 | import java.util.Collections;
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9 | import java.util.HashMap;
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10 | import java.util.HashSet;
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11 | import java.util.Iterator;
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12 | import java.util.List;
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13 | import java.util.Map;
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14 | import java.util.Set;
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15 | import java.util.Map.Entry;
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16 |
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17 | /**
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18 | * TagCollection is a collection of tags which can be used to manipulate
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19 | * tags managed by {@see OsmPrimitive}s.
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20 | *
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21 | * A TagCollection can be created:
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22 | * <ul>
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23 | * <li>from the tags managed by a specific {@see OsmPrimitive} with {@see #from(OsmPrimitive)}</li>
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24 | * <li>from the union of all tags managed by a collection of {@see OsmPrimitive}s with {@see #unionOfAllPrimitives(Collection)}</li>
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25 | * <li>from the union of all tags managed by a {@see DataSet} with {@see #unionOfAllPrimitives(DataSet)}</li>
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26 | * <li>from the intersection of all tags managed by a collection of primitives with {@see #commonToAllPrimitives(Collection)}</li>
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27 | * </ul>
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28 | *
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29 | * It provides methods to query the collection, like {@see #size()}, {@see #hasTagsFor(String)}, etc.
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30 | *
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31 | * Basic set operations allow to create the union, the intersection and the difference
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32 | * of tag collections, see {@see #union(TagCollection)}, {@see #intersect(TagCollection)},
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33 | * and {@see #minus(TagCollection)}.
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34 | *
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35 | *
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36 | */
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37 | public class TagCollection implements Iterable<Tag> {
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38 |
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39 | /**
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40 | * Creates a tag collection from the tags managed by a specific
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41 | * {@see OsmPrimitive}. If <code>primitive</code> is null, replies
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42 | * an empty tag collection.
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43 | *
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44 | * @param primitive the primitive
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45 | * @return a tag collection with the tags managed by a specific
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46 | * {@see OsmPrimitive}
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47 | */
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48 | public static TagCollection from(Tagged primitive) {
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49 | TagCollection tags = new TagCollection();
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50 | for (String key: primitive.keySet()) {
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51 | tags.add(new Tag(key, primitive.get(key)));
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52 | }
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53 | return tags;
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54 | }
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55 |
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56 | /**
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57 | * Creates a tag collection from a map of key/value-pairs. Replies
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58 | * an empty tag collection if {@code tags} is null.
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59 | *
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60 | * @param tags the key/value-pairs
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61 | * @return the tag collection
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62 | */
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63 | public static TagCollection from(Map<String,String> tags) {
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64 | TagCollection ret = new TagCollection();
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65 | if (tags == null) return ret;
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66 | for (Entry<String,String> entry: tags.entrySet()) {
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67 | String key = entry.getKey() == null? "" : entry.getKey();
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68 | String value = entry.getValue() == null ? "" : entry.getValue();
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69 | ret.add(new Tag(key,value));
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70 | }
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71 | return ret;
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72 | }
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73 |
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74 | /**
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75 | * Creates a tag collection from the union of the tags managed by
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76 | * a collection of primitives. Replies an empty tag collection,
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77 | * if <code>primitives</code> is null.
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78 | *
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79 | * @param primitives the primitives
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80 | * @return a tag collection with the union of the tags managed by
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81 | * a collection of primitives
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82 | */
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83 | public static TagCollection unionOfAllPrimitives(Collection<? extends Tagged> primitives) {
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84 | TagCollection tags = new TagCollection();
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85 | if (primitives == null) return tags;
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86 | for (Tagged primitive: primitives) {
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87 | if (primitive == null) {
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88 | continue;
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89 | }
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90 | tags.add(TagCollection.from(primitive));
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91 | }
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92 | return tags;
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93 | }
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94 |
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95 | /**
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96 | * Replies a tag collection with the tags which are common to all primitives in in
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97 | * <code>primitives</code>. Replies an empty tag collection of <code>primitives</code>
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98 | * is null.
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99 | *
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100 | * @param primitives the primitives
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101 | * @return a tag collection with the tags which are common to all primitives
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102 | */
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103 | public static TagCollection commonToAllPrimitives(Collection<? extends Tagged> primitives) {
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104 | TagCollection tags = new TagCollection();
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105 | if (primitives == null || primitives.isEmpty()) return tags;
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106 | // initialize with the first
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107 | //
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108 | tags.add(TagCollection.from(primitives.iterator().next()));
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109 |
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110 | // intersect with the others
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111 | //
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112 | for (Tagged primitive: primitives) {
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113 | if (primitive == null) {
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114 | continue;
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115 | }
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116 | tags.add(tags.intersect(TagCollection.from(primitive)));
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117 | }
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118 | return tags;
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119 | }
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120 |
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121 | /**
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122 | * Replies a tag collection with the union of the tags which are common to all primitives in
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123 | * the dataset <code>ds</code>. Returns an empty tag collection of <code>ds</code> is null.
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124 | *
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125 | * @param ds the dataset
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126 | * @return a tag collection with the union of the tags which are common to all primitives in
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127 | * the dataset <code>ds</code>
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128 | */
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129 | public static TagCollection unionOfAllPrimitives(DataSet ds) {
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130 | TagCollection tags = new TagCollection();
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131 | if (ds == null) return tags;
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132 | tags.add(TagCollection.unionOfAllPrimitives(ds.getNodes()));
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133 | tags.add(TagCollection.unionOfAllPrimitives(ds.getWays()));
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134 | tags.add(TagCollection.unionOfAllPrimitives(ds.getRelations()));
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135 | return tags;
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136 | }
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137 |
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138 | private final HashSet<Tag> tags = new HashSet<Tag>();
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139 |
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140 | /**
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141 | * Creates an empty tag collection
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142 | */
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143 | public TagCollection() {
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144 | }
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145 |
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146 | /**
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147 | * Creates a clone of the tag collection <code>other</code>. Creats an empty
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148 | * tag collection if <code>other</code> is null.
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149 | *
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150 | * @param other the other collection
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151 | */
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152 | public TagCollection(TagCollection other) {
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153 | if (other != null) {
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154 | tags.addAll(other.tags);
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155 | }
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156 | }
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157 |
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158 | /**
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159 | * Replies the number of tags in this tag collection
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160 | *
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161 | * @return the number of tags in this tag collection
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162 | */
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163 | public int size() {
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164 | return tags.size();
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165 | }
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166 |
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167 | /**
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168 | * Replies true if this tag collection is empty
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169 | *
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170 | * @return true if this tag collection is empty; false, otherwise
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171 | */
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172 | public boolean isEmpty() {
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173 | return size() == 0;
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174 | }
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175 |
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176 | /**
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177 | * Adds a tag to the tag collection. If <code>tag</code> is null, nothing is added.
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178 | *
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179 | * @param tag the tag to add
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180 | */
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181 | public void add(Tag tag){
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182 | if (tag == null) return;
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183 | if (tags.contains(tag)) return;
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184 | tags.add(tag);
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185 | }
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186 |
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187 | /**
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188 | * Adds a collection of tags to the tag collection. If <code>tags</code> is null, nothing
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189 | * is added. null values in the collection are ignored.
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190 | *
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191 | * @param tags the collection of tags
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192 | */
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193 | public void add(Collection<Tag> tags) {
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194 | if (tags == null) return;
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195 | for (Tag tag: tags){
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196 | add(tag);
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197 | }
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198 | }
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199 |
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200 | /**
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201 | * Adds the tags of another tag collection to this collection. Adds nothing, if
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202 | * <code>tags</code> is null.
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203 | *
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204 | * @param tags the other tag collection
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205 | */
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206 | public void add(TagCollection tags) {
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207 | if (tags == null) return;
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208 | this.tags.addAll(tags.tags);
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209 | }
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210 |
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211 | /**
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212 | * Removes a specific tag from the tag collection. Does nothing if <code>tag</code> is
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213 | * null.
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214 | *
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215 | * @param tag the tag to be removed
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216 | */
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217 | public void remove(Tag tag) {
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218 | if (tag == null) return;
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219 | tags.remove(tag);
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220 | }
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221 |
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222 | /**
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223 | * Removes a collection of tags from the tag collection. Does nothing if <code>tags</code> is
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224 | * null.
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225 | *
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226 | * @param tags the tags to be removed
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227 | */
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228 | public void remove(Collection<Tag> tags) {
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229 | if (tags == null) return;
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230 | this.tags.removeAll(tags);
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231 | }
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232 |
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233 | /**
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234 | * Removes all tags in the tag collection <code>tags</code> from the current tag collection.
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235 | * Does nothing if <code>tags</code> is null.
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236 | *
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237 | * @param tags the tag collection to be removed.
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238 | */
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239 | public void remove(TagCollection tags) {
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240 | if (tags == null) return;
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241 | this.tags.removeAll(tags.tags);
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242 | }
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243 |
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244 | /**
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245 | * Removes all tags whose keys are equal to <code>key</code>. Does nothing if <code>key</code>
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246 | * is null.
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247 | *
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248 | * @param key the key to be removed
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249 | */
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250 | public void removeByKey(String key) {
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251 | if (key == null) return;
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252 | Iterator<Tag> it = tags.iterator();
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253 | while(it.hasNext()) {
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254 | if (it.next().matchesKey(key)) {
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255 | it.remove();
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256 | }
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257 | }
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258 | }
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259 |
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260 | /**
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261 | * Removes all tags whose key is in the collection <code>keys</code>. Does nothing if
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262 | * <code>keys</code> is null.
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263 | *
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264 | * @param keys the collection of keys to be removed
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265 | */
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266 | public void removeByKey(Collection<String> keys) {
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267 | if (keys == null) return;
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268 | for (String key: keys) {
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269 | removeByKey(key);
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270 | }
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271 | }
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272 |
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273 | /**
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274 | * Replies true if the this tag collection contains <code>tag</code>.
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275 | *
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276 | * @param tag the tag to look up
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277 | * @return true if the this tag collection contains <code>tag</code>; false, otherwise
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278 | */
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279 | public boolean contains(Tag tag) {
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280 | return tags.contains(tag);
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281 | }
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282 |
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283 | /**
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284 | * Replies true if this tag collection contains at least one tag with key <code>key</code>.
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285 | *
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286 | * @param key the key to look up
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287 | * @return true if this tag collection contains at least one tag with key <code>key</code>; false, otherwise
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288 | */
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289 | public boolean containsKey(String key) {
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290 | if (key == null) return false;
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291 | for (Tag tag: tags) {
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292 | if (tag.matchesKey(key)) return true;
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293 | }
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294 | return false;
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295 | }
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296 |
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297 | /**
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298 | * Replies true if this tag collection contains all tags in <code>tags</code>. Replies
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299 | * false, if tags is null.
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300 | *
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301 | * @param tags the tags to look up
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302 | * @return true if this tag collection contains all tags in <code>tags</code>. Replies
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303 | * false, if tags is null.
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304 | */
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305 | public boolean containsAll(Collection<Tag> tags) {
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306 | if (tags == null) return false;
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307 | return this.tags.containsAll(tags);
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308 | }
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309 |
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310 | /**
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311 | * Replies true if this tag collection at least one tag for every key in <code>keys</code>.
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312 | * Replies false, if <code>keys</code> is null. null values in <code>keys</code> are ignored.
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313 | *
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314 | * @param keys the keys to lookup
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315 | * @return true if this tag collection at least one tag for every key in <code>keys</code>.
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316 | */
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317 | public boolean containsAllKeys(Collection<String> keys) {
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318 | if (keys == null) return false;
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319 | for (String key: keys) {
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320 | if (key == null) {
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321 | continue;
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322 | }
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323 | if (! containsKey(key)) return false;
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324 | }
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325 | return true;
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326 | }
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327 |
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328 | /**
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329 | * Replies the number of tags with key <code>key</code>
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330 | *
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331 | * @param key the key to look up
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332 | * @return the number of tags with key <code>key</code>. 0, if key is null.
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333 | */
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334 | public int getNumTagsFor(String key) {
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335 | if (key == null) return 0;
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336 | int count = 0;
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337 | for (Tag tag: tags) {
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338 | if (tag.matchesKey(key)) {
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339 | count++;
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340 | }
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341 | }
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342 | return count;
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343 | }
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344 |
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345 | /**
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346 | * Replies true if there is at least one tag for the given key.
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347 | *
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348 | * @param key the key to look up
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349 | * @return true if there is at least one tag for the given key. false, if key is null.
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350 | */
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351 | public boolean hasTagsFor(String key) {
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352 | return getNumTagsFor(key) > 0;
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353 | }
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354 |
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355 | /**
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356 | * Replies true it there is at least one tag with a non empty value for key.
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357 | * Replies false if key is null.
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358 | *
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359 | * @param key the key
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360 | * @return true it there is at least one tag with a non empty value for key.
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361 | */
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362 | public boolean hasValuesFor(String key) {
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363 | if (key == null) return false;
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364 | Set<String> values = getTagsFor(key).getValues();
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365 | values.remove("");
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366 | return !values.isEmpty();
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367 | }
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368 |
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369 | /**
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370 | * Replies true if there is exactly one tag for <code>key</code> and
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371 | * if the value of this tag is not empty. Replies false if key is
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372 | * null.
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373 | *
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374 | * @param key the key
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375 | * @return true if there is exactly one tag for <code>key</code> and
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376 | * if the value of this tag is not empty
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377 | */
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378 | public boolean hasUniqueNonEmptyValue(String key) {
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379 | if (key == null) return false;
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380 | Set<String> values = getTagsFor(key).getValues();
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381 | return values.size() == 1 && ! values.contains("");
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382 | }
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383 |
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384 | /**
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385 | * Replies true if there is a tag with an empty value for <code>key</code>.
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386 | * Replies false, if key is null.
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387 | *
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388 | * @param key the key
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389 | * @return true if there is a tag with an empty value for <code>key</code>
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390 | */
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391 | public boolean hasEmptyValue(String key) {
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392 | if (key == null) return false;
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393 | Set<String> values = getTagsFor(key).getValues();
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394 | return values.contains("");
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395 | }
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396 |
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397 | /**
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398 | * Replies true if there is exactly one tag for <code>key</code> and if
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399 | * the value for this tag is empty. Replies false if key is null.
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400 | *
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401 | * @param key the key
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402 | * @return true if there is exactly one tag for <code>key</code> and if
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403 | * the value for this tag is empty
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404 | */
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405 | public boolean hasUniqueEmptyValue(String key) {
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406 | if (key == null) return false;
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407 | Set<String> values = getTagsFor(key).getValues();
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408 | return values.size() == 1 && values.contains("");
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409 | }
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410 |
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411 | /**
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412 | * Replies a tag collection with the tags for a given key. Replies an empty collection
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413 | * if key is null.
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414 | *
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415 | * @param key the key to look up
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416 | * @return a tag collection with the tags for a given key. Replies an empty collection
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417 | * if key is null.
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418 | */
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419 | public TagCollection getTagsFor(String key) {
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420 | TagCollection ret = new TagCollection();
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421 | if (key == null)
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422 | return ret;
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423 | for (Tag tag: tags) {
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424 | if (tag.matchesKey(key)) {
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425 | ret.add(tag);
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426 | }
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427 | }
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428 | return ret;
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429 | }
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430 |
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431 | /**
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432 | * Replies a tag collection with all tags whose key is equal to one of the keys in
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433 | * <code>keys</code>. Replies an empty collection if keys is null.
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434 | *
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435 | * @param keys the keys to look up
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436 | * @return a tag collection with all tags whose key is equal to one of the keys in
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437 | * <code>keys</code>
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438 | */
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439 | public TagCollection getTagsFor(Collection<String> keys) {
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440 | TagCollection ret = new TagCollection();
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441 | if (keys == null)
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442 | return ret;
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443 | for(String key : keys) {
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444 | if (key != null) {
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445 | ret.add(getTagsFor(key));
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446 | }
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447 | }
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448 | return ret;
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449 | }
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450 |
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451 | /**
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452 | * Replies the tags of this tag collection as set
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453 | *
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454 | * @return the tags of this tag collection as set
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455 | */
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456 | public Set<Tag> asSet() {
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457 | return new HashSet<Tag>(tags);
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458 | }
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459 |
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460 | /**
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461 | * Replies the tags of this tag collection as list.
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462 | * Note that the order of the list is not preserved between method invocations.
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463 | *
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464 | * @return the tags of this tag collection as list.
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465 | */
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466 | public List<Tag> asList() {
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467 | return new ArrayList<Tag>(tags);
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468 | }
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469 |
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470 | /**
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471 | * Replies an iterator to iterate over the tags in this collection
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472 | *
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473 | * @return the iterator
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474 | */
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475 | public Iterator<Tag> iterator() {
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476 | return tags.iterator();
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477 | }
|
---|
478 |
|
---|
479 | /**
|
---|
480 | * Replies the set of keys of this tag collection.
|
---|
481 | *
|
---|
482 | * @return the set of keys of this tag collection
|
---|
483 | */
|
---|
484 | public Set<String> getKeys() {
|
---|
485 | HashSet<String> ret = new HashSet<String>();
|
---|
486 | for (Tag tag: tags) {
|
---|
487 | ret.add(tag.getKey());
|
---|
488 | }
|
---|
489 | return ret;
|
---|
490 | }
|
---|
491 |
|
---|
492 | /**
|
---|
493 | * Replies the set of keys which have at least 2 matching tags.
|
---|
494 | *
|
---|
495 | * @return the set of keys which have at least 2 matching tags.
|
---|
496 | */
|
---|
497 | public Set<String> getKeysWithMultipleValues() {
|
---|
498 | HashMap<String, Integer> counters = new HashMap<String, Integer>();
|
---|
499 | for (Tag tag: tags) {
|
---|
500 | Integer v = counters.get(tag.getKey());
|
---|
501 | counters.put(tag.getKey(),(v==null) ? 1 : v+1);
|
---|
502 | }
|
---|
503 | Set<String> ret = new HashSet<String>();
|
---|
504 | for (Entry<String, Integer> e : counters.entrySet()) {
|
---|
505 | if (e.getValue() > 1) {
|
---|
506 | ret.add(e.getKey());
|
---|
507 | }
|
---|
508 | }
|
---|
509 | return ret;
|
---|
510 | }
|
---|
511 |
|
---|
512 | /**
|
---|
513 | * Sets a unique tag for the key of this tag. All other tags with the same key are
|
---|
514 | * removed from the collection. Does nothing if tag is null.
|
---|
515 | *
|
---|
516 | * @param tag the tag to set
|
---|
517 | */
|
---|
518 | public void setUniqueForKey(Tag tag) {
|
---|
519 | if (tag == null) return;
|
---|
520 | removeByKey(tag.getKey());
|
---|
521 | add(tag);
|
---|
522 | }
|
---|
523 |
|
---|
524 | /**
|
---|
525 | * Sets a unique tag for the key of this tag. All other tags with the same key are
|
---|
526 | * removed from the collection. Assume the empty string for key and value if either
|
---|
527 | * key or value is null.
|
---|
528 | *
|
---|
529 | * @param key the key
|
---|
530 | * @param value the value
|
---|
531 | */
|
---|
532 | public void setUniqueForKey(String key, String value) {
|
---|
533 | Tag tag = new Tag(key, value);
|
---|
534 | setUniqueForKey(tag);
|
---|
535 | }
|
---|
536 |
|
---|
537 | /**
|
---|
538 | * Replies the set of values in this tag collection
|
---|
539 | *
|
---|
540 | * @return the set of values
|
---|
541 | */
|
---|
542 | public Set<String> getValues() {
|
---|
543 | HashSet<String> ret = new HashSet<String>();
|
---|
544 | for (Tag tag: tags) {
|
---|
545 | ret.add(tag.getValue());
|
---|
546 | }
|
---|
547 | return ret;
|
---|
548 | }
|
---|
549 |
|
---|
550 | /**
|
---|
551 | * Replies the set of values for a given key. Replies an empty collection if there
|
---|
552 | * are no values for the given key.
|
---|
553 | *
|
---|
554 | * @param key the key to look up
|
---|
555 | * @return the set of values for a given key. Replies an empty collection if there
|
---|
556 | * are no values for the given key
|
---|
557 | */
|
---|
558 | public Set<String> getValues(String key) {
|
---|
559 | HashSet<String> ret = new HashSet<String>();
|
---|
560 | if (key == null) return ret;
|
---|
561 | for (Tag tag: tags) {
|
---|
562 | if (tag.matchesKey(key)) {
|
---|
563 | ret.add(tag.getValue());
|
---|
564 | }
|
---|
565 | }
|
---|
566 | return ret;
|
---|
567 | }
|
---|
568 |
|
---|
569 | /**
|
---|
570 | * Replies true if for every key there is one tag only, i.e. exactly one value.
|
---|
571 | *
|
---|
572 | * @return
|
---|
573 | */
|
---|
574 | public boolean isApplicableToPrimitive() {
|
---|
575 | return size() == getKeys().size();
|
---|
576 | }
|
---|
577 |
|
---|
578 | /**
|
---|
579 | * Applies this tag collection to an {@see OsmPrimitive}. Does nothing if
|
---|
580 | * primitive is null
|
---|
581 | *
|
---|
582 | * @param primitive the primitive
|
---|
583 | * @throws IllegalStateException thrown if this tag collection can't be applied
|
---|
584 | * because there are keys with multiple values
|
---|
585 | */
|
---|
586 | public void applyTo(Tagged primitive) throws IllegalStateException {
|
---|
587 | if (primitive == null) return;
|
---|
588 | if (! isApplicableToPrimitive())
|
---|
589 | throw new IllegalStateException(tr("Tag collection cannot be applied to a primitive because there are keys with multiple values."));
|
---|
590 | for (Tag tag: tags) {
|
---|
591 | if (tag.getValue() == null || tag.getValue().equals("")) {
|
---|
592 | primitive.remove(tag.getKey());
|
---|
593 | } else {
|
---|
594 | primitive.put(tag.getKey(), tag.getValue());
|
---|
595 | }
|
---|
596 | }
|
---|
597 | }
|
---|
598 |
|
---|
599 | /**
|
---|
600 | * Applies this tag collection to a collection of {@see OsmPrimitive}s. Does nothing if
|
---|
601 | * primitives is null
|
---|
602 | *
|
---|
603 | * @param primitives the collection of primitives
|
---|
604 | * @throws IllegalStateException thrown if this tag collection can't be applied
|
---|
605 | * because there are keys with multiple values
|
---|
606 | */
|
---|
607 | public void applyTo(Collection<? extends Tagged> primitives) throws IllegalStateException{
|
---|
608 | if (primitives == null) return;
|
---|
609 | if (! isApplicableToPrimitive())
|
---|
610 | throw new IllegalStateException(tr("Tag collection cannot be applied to a primitive because there are keys with multiple values."));
|
---|
611 | for (Tagged primitive: primitives) {
|
---|
612 | applyTo(primitive);
|
---|
613 | }
|
---|
614 | }
|
---|
615 |
|
---|
616 | /**
|
---|
617 | * Replaces the tags of an {@see OsmPrimitive} by the tags in this collection . Does nothing if
|
---|
618 | * primitive is null
|
---|
619 | *
|
---|
620 | * @param primitive the primitive
|
---|
621 | * @throws IllegalStateException thrown if this tag collection can't be applied
|
---|
622 | * because there are keys with multiple values
|
---|
623 | */
|
---|
624 | public void replaceTagsOf(Tagged primitive) throws IllegalStateException {
|
---|
625 | if (primitive == null) return;
|
---|
626 | if (! isApplicableToPrimitive())
|
---|
627 | throw new IllegalStateException(tr("Tag collection cannot be applied to a primitive because there are keys with multiple values."));
|
---|
628 | primitive.removeAll();
|
---|
629 | for (Tag tag: tags) {
|
---|
630 | primitive.put(tag.getKey(), tag.getValue());
|
---|
631 | }
|
---|
632 | }
|
---|
633 |
|
---|
634 | /**
|
---|
635 | * Replaces the tags of a collection of{@see OsmPrimitive}s by the tags in this collection.
|
---|
636 | * Does nothing if primitives is null
|
---|
637 | *
|
---|
638 | * @param primitive the collection of primitives
|
---|
639 | * @throws IllegalStateException thrown if this tag collection can't be applied
|
---|
640 | * because there are keys with multiple values
|
---|
641 | */
|
---|
642 | public void replaceTagsOf(Collection<? extends Tagged> primitives) throws IllegalStateException {
|
---|
643 | if (primitives == null) return;
|
---|
644 | if (! isApplicableToPrimitive())
|
---|
645 | throw new IllegalStateException(tr("Tag collection cannot be applied to a primitive because there are keys with multiple values."));
|
---|
646 | for (Tagged primitive: primitives) {
|
---|
647 | replaceTagsOf(primitive);
|
---|
648 | }
|
---|
649 | }
|
---|
650 |
|
---|
651 | /**
|
---|
652 | * Builds the intersection of this tag collection and another tag collection
|
---|
653 | *
|
---|
654 | * @param other the other tag collection. If null, replies an empty tag collection.
|
---|
655 | * @return the intersection of this tag collection and another tag collection
|
---|
656 | */
|
---|
657 | public TagCollection intersect(TagCollection other) {
|
---|
658 | if (other == null) {
|
---|
659 | other = new TagCollection();
|
---|
660 | }
|
---|
661 | TagCollection ret = new TagCollection(this);
|
---|
662 | for (Tag tag: tags) {
|
---|
663 | if (other.contains(tag)) {
|
---|
664 | ret.add(tag);
|
---|
665 | }
|
---|
666 | }
|
---|
667 | return ret;
|
---|
668 | }
|
---|
669 |
|
---|
670 | /**
|
---|
671 | * Replies the difference of this tag collection and another tag collection
|
---|
672 | *
|
---|
673 | * @param other the other tag collection. May be null.
|
---|
674 | * @return the difference of this tag collection and another tag collection
|
---|
675 | */
|
---|
676 | public TagCollection minus(TagCollection other) {
|
---|
677 | TagCollection ret = new TagCollection(this);
|
---|
678 | if (other != null) {
|
---|
679 | ret.remove(other);
|
---|
680 | }
|
---|
681 | return ret;
|
---|
682 | }
|
---|
683 |
|
---|
684 | /**
|
---|
685 | * Replies the union of this tag collection and another tag collection
|
---|
686 | *
|
---|
687 | * @param other the other tag collection. May be null.
|
---|
688 | * @return the union of this tag collection and another tag collection
|
---|
689 | */
|
---|
690 | public TagCollection union(TagCollection other) {
|
---|
691 | TagCollection ret = new TagCollection(this);
|
---|
692 | if (other != null) {
|
---|
693 | ret.add(other);
|
---|
694 | }
|
---|
695 | return ret;
|
---|
696 | }
|
---|
697 |
|
---|
698 | public TagCollection emptyTagsForKeysMissingIn(TagCollection other) {
|
---|
699 | TagCollection ret = new TagCollection();
|
---|
700 | for(String key: this.minus(other).getKeys()) {
|
---|
701 | ret.add(new Tag(key));
|
---|
702 | }
|
---|
703 | return ret;
|
---|
704 | }
|
---|
705 |
|
---|
706 | /**
|
---|
707 | * Replies the concatenation of all tag values (concatenated by a semicolon)
|
---|
708 | *
|
---|
709 | * @return the concatenation of all tag values
|
---|
710 | */
|
---|
711 | public String getJoinedValues(String key) {
|
---|
712 | StringBuffer buffer = new StringBuffer();
|
---|
713 | List<String> values = new ArrayList<String>(getValues(key));
|
---|
714 | values.remove("");
|
---|
715 | Collections.sort(values);
|
---|
716 | Iterator<String> iter = values.iterator();
|
---|
717 | while (iter.hasNext()) {
|
---|
718 | buffer.append(iter.next());
|
---|
719 | if (iter.hasNext()) {
|
---|
720 | buffer.append(";");
|
---|
721 | }
|
---|
722 | }
|
---|
723 | return buffer.toString();
|
---|
724 | }
|
---|
725 |
|
---|
726 | @Override
|
---|
727 | public String toString() {
|
---|
728 | return tags.toString();
|
---|
729 | }
|
---|
730 | }
|
---|