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.ArrayList;
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5 | import java.util.Collection;
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6 | import java.util.HashSet;
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7 | import java.util.List;
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8 | import java.util.Set;
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9 |
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10 | import org.openstreetmap.josm.data.osm.visitor.AbstractVisitor;
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11 |
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12 | /**
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13 | * This class allows to create and keep a deep copy of primitives. Provides methods to access directly added
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14 | * primitives and reference primitives
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15 | *
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16 | */
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17 | public class PrimitiveDeepCopy {
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18 |
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19 | private final List<PrimitiveData> directlyAdded = new ArrayList<PrimitiveData>();
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20 | private final List<PrimitiveData> referenced = new ArrayList<PrimitiveData>();
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21 |
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22 | public PrimitiveDeepCopy() {
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23 |
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24 | }
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25 |
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26 | public PrimitiveDeepCopy(final Collection<OsmPrimitive> primitives) {
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27 | makeCopy(primitives);
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28 | }
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29 |
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30 | /**
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31 | * Replace content of the object with copy of provided primitives
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32 | * @param primitives
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33 | */
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34 | public final void makeCopy(final Collection<OsmPrimitive> primitives) {
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35 | directlyAdded.clear();
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36 | referenced.clear();
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37 |
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38 | final Set<Long> visitedIds = new HashSet<Long>();
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39 |
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40 | new AbstractVisitor() {
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41 | boolean firstIteration;
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42 |
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43 | public void visit(Node n) {
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44 | if (!visitedIds.add(n.getUniqueId()))
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45 | return;
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46 | (firstIteration?directlyAdded:referenced).add(n.save());
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47 | }
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48 | public void visit(Way w) {
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49 | if (!visitedIds.add(w.getUniqueId()))
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50 | return;
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51 | (firstIteration?directlyAdded:referenced).add(w.save());
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52 | firstIteration = false;
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53 | for (Node n : w.getNodes()) {
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54 | visit(n);
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55 | }
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56 | }
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57 | public void visit(Relation e) {
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58 | if (!visitedIds.add(e.getUniqueId()))
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59 | return;
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60 | (firstIteration?directlyAdded:referenced).add(e.save());
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61 | firstIteration = false;
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62 | for (RelationMember m : e.getMembers()) {
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63 | m.getMember().visit(this);
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64 | }
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65 | }
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66 |
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67 | public void visitAll() {
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68 | for (OsmPrimitive osm : primitives) {
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69 | firstIteration = true;
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70 | osm.visit(this);
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71 | }
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72 | }
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73 | }.visitAll();
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74 | }
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75 |
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76 | public List<PrimitiveData> getDirectlyAdded() {
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77 | return directlyAdded;
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78 | }
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79 |
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80 | public List<PrimitiveData> getReferenced() {
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81 | return referenced;
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82 | }
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83 |
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84 | public List<PrimitiveData> getAll() {
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85 | List<PrimitiveData> result = new ArrayList<PrimitiveData>(directlyAdded.size() + referenced.size());
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86 | result.addAll(directlyAdded);
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87 | result.addAll(referenced);
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88 | return result;
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89 | }
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90 |
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91 | public boolean isEmpty() {
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92 | return directlyAdded.isEmpty() && referenced.isEmpty();
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93 | }
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94 |
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95 | }
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