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 java.util.Objects;
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5 | import java.util.Optional;
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6 |
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7 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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8 |
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9 | /**
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10 | * A linkage class that can be used by an relation to keep a list of members.
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11 | * Since membership may be qualified by a "role", a simple list is not sufficient.
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12 | * @since 343
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13 | */
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14 | public class RelationMember implements IRelationMember<OsmPrimitive> {
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15 |
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16 | /**
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17 | *
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18 | */
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19 | private final String role;
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20 |
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21 | /**
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22 | *
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23 | */
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24 | private final OsmPrimitive member;
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25 |
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26 | @Override
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27 | public String getRole() {
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28 | return role;
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29 | }
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30 |
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31 | @Override
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32 | public boolean isRelation() {
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33 | return member instanceof Relation;
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34 | }
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35 |
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36 | @Override
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37 | public boolean isWay() {
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38 | return member instanceof Way;
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39 | }
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40 |
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41 | @Override
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42 | public boolean isNode() {
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43 | return member instanceof Node;
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44 | }
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45 |
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46 | /**
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47 | * Returns the relation member as a relation.
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48 | * @return Member as relation
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49 | * @since 1937
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50 | */
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51 | public Relation getRelation() {
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52 | return (Relation) member;
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53 | }
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54 |
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55 | /**
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56 | * Returns the relation member as a way.
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57 | * @return Member as way
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58 | * @since 1937
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59 | */
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60 | @Override
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61 | public Way getWay() {
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62 | return (Way) member;
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63 | }
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64 |
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65 | /**
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66 | * Returns the relation member as a node.
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67 | * @return Member as node
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68 | * @since 1937
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69 | */
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70 | public Node getNode() {
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71 | return (Node) member;
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72 | }
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73 |
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74 | @Override
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75 | public OsmPrimitive getMember() {
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76 | return member;
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77 | }
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78 |
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79 | /**
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80 | * Constructs a new {@code RelationMember}.
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81 | * @param role Can be null, in this case it's save as ""
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82 | * @param member Cannot be null
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83 | * @throws IllegalArgumentException if member is <code>null</code>
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84 | */
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85 | public RelationMember(String role, OsmPrimitive member) {
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86 | CheckParameterUtil.ensureParameterNotNull(member, "member");
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87 | this.role = Optional.ofNullable(role).orElse("").intern();
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88 | this.member = member;
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89 | }
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90 |
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91 | /**
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92 | * Copy constructor.
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93 | * This constructor is left only for backwards compatibility. Copying RelationMember doesn't make sense
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94 | * because it's immutable
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95 | * @param other relation member to be copied.
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96 | */
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97 | public RelationMember(RelationMember other) {
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98 | this(other.role, other.member);
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99 | }
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100 |
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101 | @Override
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102 | public String toString() {
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103 | return '"' + role + "\"=" + member;
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104 | }
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105 |
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106 | /**
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107 | * Replies true, if this relation member refers to the primitive
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108 | *
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109 | * @param primitive the primitive to check
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110 | * @return true, if this relation member refers to the primitive
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111 | */
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112 | public boolean refersTo(OsmPrimitive primitive) {
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113 | return member == primitive;
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114 | }
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115 |
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116 | @Override
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117 | public int hashCode() {
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118 | return Objects.hash(role, member);
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119 | }
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120 |
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121 | @Override
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122 | public boolean equals(Object obj) {
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123 | if (this == obj) return true;
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124 | if (obj == null || getClass() != obj.getClass()) return false;
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125 | RelationMember that = (RelationMember) obj;
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126 | return Objects.equals(role, that.role) &&
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127 | Objects.equals(member, that.member);
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128 | }
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129 |
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130 | /**
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131 | * PrimitiveId implementation. Returns the same value as getMember().getType()
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132 | */
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133 | @Override
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134 | public OsmPrimitiveType getType() {
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135 | return member.getType();
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136 | }
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137 |
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138 | /**
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139 | * PrimitiveId implementation. Returns the same value as getMember().getUniqueId()
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140 | */
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141 | @Override
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142 | public long getUniqueId() {
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143 | return member.getUniqueId();
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144 | }
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145 |
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146 | /**
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147 | * PrimitiveId implementation. Returns the same value as getMember().isNew()
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148 | */
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149 | @Override
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150 | public boolean isNew() {
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151 | return member.isNew();
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152 | }
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153 | }
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