1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.preferences;
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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.Collections;
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7 | import java.util.Iterator;
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8 | import java.util.List;
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9 |
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10 | import org.openstreetmap.josm.tools.Utils;
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11 |
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12 | /**
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13 | * Setting containing a {@link List} of {@code List}s of {@link String} values.
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14 | * @since 9759
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15 | */
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16 | public class ListListSetting extends AbstractSetting<List<List<String>>> {
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17 |
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18 | /**
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19 | * Constructs a new {@code ListListSetting} with the given value
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20 | * @param value The setting value
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21 | */
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22 | public ListListSetting(List<List<String>> value) {
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23 | super(value);
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24 | consistencyTest();
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25 | }
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26 |
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27 | /**
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28 | * Convenience factory method.
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29 | * @param value the value
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30 | * @return a corresponding ListListSetting object
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31 | */
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32 | public static ListListSetting create(Collection<Collection<String>> value) {
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33 | if (value != null) {
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34 | List<List<String>> valueList = new ArrayList<>(value.size());
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35 | for (Collection<String> lst : value) {
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36 | valueList.add(new ArrayList<>(lst));
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37 | }
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38 | return new ListListSetting(valueList);
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39 | }
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40 | return new ListListSetting(null);
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41 | }
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42 |
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43 | @Override
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44 | public boolean equalVal(List<List<String>> otherVal) {
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45 | if (value == null)
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46 | return otherVal == null;
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47 | if (otherVal == null)
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48 | return false;
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49 | if (value.size() != otherVal.size())
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50 | return false;
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51 | Iterator<List<String>> itA = value.iterator();
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52 | Iterator<List<String>> itB = otherVal.iterator();
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53 | while (itA.hasNext()) {
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54 | if (!Utils.equalCollection(itA.next(), itB.next()))
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55 | return false;
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56 | }
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57 | return true;
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58 | }
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59 |
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60 | @Override
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61 | public ListListSetting copy() {
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62 | if (value == null)
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63 | return new ListListSetting(null);
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64 |
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65 | List<List<String>> copy = new ArrayList<>(value.size());
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66 | for (Collection<String> lst : value) {
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67 | List<String> lstCopy = new ArrayList<>(lst);
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68 | copy.add(Collections.unmodifiableList(lstCopy));
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69 | }
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70 | return new ListListSetting(Collections.unmodifiableList(copy));
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71 | }
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72 |
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73 | private void consistencyTest() {
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74 | if (value != null) {
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75 | if (value.contains(null))
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76 | throw new RuntimeException("Error: Null as list element in preference setting");
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77 | for (Collection<String> lst : value) {
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78 | if (lst.contains(null)) {
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79 | throw new RuntimeException("Error: Null as inner list element in preference setting");
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80 | }
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81 | }
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82 | }
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83 | }
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84 |
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85 | @Override
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86 | public void visit(SettingVisitor visitor) {
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87 | visitor.visit(this);
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88 | }
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89 |
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90 | @Override
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91 | public ListListSetting getNullInstance() {
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92 | return new ListListSetting(null);
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93 | }
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94 |
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95 | @Override
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96 | public boolean equals(Object other) {
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97 | if (!(other instanceof ListListSetting))
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98 | return false;
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99 | return equalVal(((ListListSetting) other).getValue());
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100 | }
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101 | }
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