1 | // License: GPL. For details, see LICENSE file.
|
---|
2 | package org.openstreetmap.josm.data.osm.visitor;
|
---|
3 |
|
---|
4 | import java.util.ArrayList;
|
---|
5 | import java.util.HashMap;
|
---|
6 | import java.util.List;
|
---|
7 |
|
---|
8 | import org.openstreetmap.josm.data.osm.DataSet;
|
---|
9 | import org.openstreetmap.josm.data.osm.Node;
|
---|
10 | import org.openstreetmap.josm.data.osm.NodeData;
|
---|
11 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
|
---|
12 | import org.openstreetmap.josm.data.osm.PrimitiveData;
|
---|
13 | import org.openstreetmap.josm.data.osm.Relation;
|
---|
14 | import org.openstreetmap.josm.data.osm.RelationData;
|
---|
15 | import org.openstreetmap.josm.data.osm.RelationMember;
|
---|
16 | import org.openstreetmap.josm.data.osm.RelationMemberData;
|
---|
17 | import org.openstreetmap.josm.data.osm.Way;
|
---|
18 | import org.openstreetmap.josm.data.osm.WayData;
|
---|
19 | import org.openstreetmap.josm.tools.CheckParameterUtil;
|
---|
20 |
|
---|
21 | /**
|
---|
22 | * MergeSourceBuildingVisitor helps to build the "hull" of a collection of {@link OsmPrimitive}s
|
---|
23 | * which shall be merged into another layer. The "hull" is slightly bigger than the original
|
---|
24 | * collection. It includes, for instance the nodes of a way in the original collection even though
|
---|
25 | * these nodes might not be present explicitly in the original collection. The "hull" also includes
|
---|
26 | * incomplete {@link OsmPrimitive}s which are referred to by relations in the original collection. And
|
---|
27 | * it turns {@link OsmPrimitive} referred to by {@link Relation}s in the original collection into
|
---|
28 | * incomplete {@link OsmPrimitive}s in the "hull", if they are not themselves present in the
|
---|
29 | * original collection.
|
---|
30 | *
|
---|
31 | */
|
---|
32 | public class MergeSourceBuildingVisitor extends AbstractVisitor {
|
---|
33 | private DataSet selectionBase;
|
---|
34 | private DataSet hull;
|
---|
35 | private HashMap<OsmPrimitive, PrimitiveData> mappedPrimitives;
|
---|
36 |
|
---|
37 | /**
|
---|
38 | * Creates the visitor. The visitor starts to build the "hull" from
|
---|
39 | * the currently selected primitives in the dataset <code>selectionBase</code>,
|
---|
40 | * i.e. from {@link DataSet#getSelected()}.
|
---|
41 | *
|
---|
42 | * @param selectionBase the dataset. Must not be null.
|
---|
43 | * @exception IllegalArgumentException thrown if selectionBase is null
|
---|
44 | *
|
---|
45 | */
|
---|
46 | public MergeSourceBuildingVisitor(DataSet selectionBase) throws IllegalArgumentException {
|
---|
47 | CheckParameterUtil.ensureParameterNotNull(selectionBase, "selectionBase");
|
---|
48 | this.selectionBase = selectionBase;
|
---|
49 | this.hull = new DataSet();
|
---|
50 | this.mappedPrimitives = new HashMap<OsmPrimitive, PrimitiveData>();
|
---|
51 | }
|
---|
52 |
|
---|
53 | protected boolean isInSelectionBase(OsmPrimitive primitive) {
|
---|
54 | return selectionBase.getSelected().contains(primitive);
|
---|
55 | }
|
---|
56 |
|
---|
57 | protected boolean isAlreadyRemembered(OsmPrimitive primitive) {
|
---|
58 | return mappedPrimitives.keySet().contains(primitive);
|
---|
59 | }
|
---|
60 |
|
---|
61 | /**
|
---|
62 | * Remebers a node in the "hull"
|
---|
63 | *
|
---|
64 | * @param n the node
|
---|
65 | */
|
---|
66 | protected void rememberNode(Node n) {
|
---|
67 | if (isAlreadyRemembered(n))
|
---|
68 | return;
|
---|
69 | mappedPrimitives.put(n, n.save());
|
---|
70 | }
|
---|
71 |
|
---|
72 | /**
|
---|
73 | * remembers a way in the hull
|
---|
74 | *
|
---|
75 | * @param w the way
|
---|
76 | */
|
---|
77 | protected void rememberWay(Way w) {
|
---|
78 | if (isAlreadyRemembered(w))
|
---|
79 | return;
|
---|
80 | WayData clone = w.save();
|
---|
81 | List<Long> newNodes = new ArrayList<Long>(w.getNodesCount());
|
---|
82 | for (Node n: w.getNodes()) {
|
---|
83 | newNodes.add(mappedPrimitives.get(n).getUniqueId());
|
---|
84 | }
|
---|
85 | clone.setNodes(newNodes);
|
---|
86 | mappedPrimitives.put(w, clone);
|
---|
87 | }
|
---|
88 |
|
---|
89 | /**
|
---|
90 | * Remembers a relation in the hull
|
---|
91 | *
|
---|
92 | * @param r the relation
|
---|
93 | */
|
---|
94 | protected void rememberRelation(Relation r) {
|
---|
95 | RelationData clone;
|
---|
96 | if (isAlreadyRemembered(r)) {
|
---|
97 | clone = (RelationData)mappedPrimitives.get(r);
|
---|
98 | } else {
|
---|
99 | clone = r.save();
|
---|
100 | mappedPrimitives.put(r, clone);
|
---|
101 | }
|
---|
102 |
|
---|
103 | List<RelationMemberData> newMembers = new ArrayList<RelationMemberData>();
|
---|
104 | for (RelationMember member: r.getMembers()) {
|
---|
105 | newMembers.add(
|
---|
106 | new RelationMemberData(member.getRole(), mappedPrimitives.get(member.getMember())));
|
---|
107 |
|
---|
108 | }
|
---|
109 | clone.setMembers(newMembers);
|
---|
110 | }
|
---|
111 |
|
---|
112 | protected void rememberRelationPartial(Relation r) {
|
---|
113 | if (isAlreadyRemembered(r))
|
---|
114 | return;
|
---|
115 | RelationData clone = r.save();
|
---|
116 | clone.getMembers().clear();
|
---|
117 | mappedPrimitives.put(r, clone);
|
---|
118 | }
|
---|
119 |
|
---|
120 | protected void rememberIncomplete(OsmPrimitive primitive) {
|
---|
121 | if (isAlreadyRemembered(primitive))
|
---|
122 | return;
|
---|
123 | PrimitiveData clone = primitive.save();
|
---|
124 | clone.setIncomplete(true);
|
---|
125 | mappedPrimitives.put(primitive, clone);
|
---|
126 | }
|
---|
127 |
|
---|
128 | public void visit(Node n) {
|
---|
129 | rememberNode(n);
|
---|
130 | }
|
---|
131 |
|
---|
132 | public void visit(Way w) {
|
---|
133 | // remember all nodes this way refers to ...
|
---|
134 | //
|
---|
135 | for (Node n: w.getNodes()) {
|
---|
136 | n.visit(this);
|
---|
137 | }
|
---|
138 | // ... and the way itself
|
---|
139 | rememberWay(w);
|
---|
140 | }
|
---|
141 |
|
---|
142 | public void visit(Relation r) {
|
---|
143 | // first, remember all primitives members refer to (only if necessary, see
|
---|
144 | // below)
|
---|
145 | //
|
---|
146 | rememberRelationPartial(r);
|
---|
147 | for (RelationMember member: r.getMembers()) {
|
---|
148 | if (isAlreadyRemembered(member.getMember())) {
|
---|
149 | // referred primitive already remembered
|
---|
150 | //
|
---|
151 | continue;
|
---|
152 | }
|
---|
153 | if (isInSelectionBase(member.getMember()) || member.getMember().isNew()) {
|
---|
154 | member.getMember().visit(this);
|
---|
155 | } else {
|
---|
156 | rememberIncomplete(member.getMember());
|
---|
157 | }
|
---|
158 | }
|
---|
159 | rememberRelation(r);
|
---|
160 | }
|
---|
161 |
|
---|
162 | protected void buildHull() {
|
---|
163 | // Create all primitives first
|
---|
164 | for (PrimitiveData primitive: mappedPrimitives.values()) {
|
---|
165 | OsmPrimitive newPrimitive = hull.getPrimitiveById(primitive);
|
---|
166 | boolean created = newPrimitive == null;
|
---|
167 | if (created) {
|
---|
168 | newPrimitive = primitive.getType().newInstance(primitive.getUniqueId(), true);
|
---|
169 | }
|
---|
170 | if (newPrimitive instanceof Node && !primitive.isIncomplete()) {
|
---|
171 | newPrimitive.load(primitive);
|
---|
172 | }
|
---|
173 | if (created) {
|
---|
174 | hull.addPrimitive(newPrimitive);
|
---|
175 | }
|
---|
176 | }
|
---|
177 | // Then ways and relations
|
---|
178 | for (PrimitiveData primitive : mappedPrimitives.values()) {
|
---|
179 | if (!(primitive instanceof NodeData) && !primitive.isIncomplete()) {
|
---|
180 | hull.getPrimitiveById(primitive).load(primitive);
|
---|
181 | }
|
---|
182 | }
|
---|
183 | }
|
---|
184 |
|
---|
185 | public DataSet build() {
|
---|
186 | for (OsmPrimitive primitive: selectionBase.getSelected()) {
|
---|
187 | primitive.visit(this);
|
---|
188 | }
|
---|
189 | buildHull();
|
---|
190 | return hull;
|
---|
191 | }
|
---|
192 | }
|
---|