1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.spi.preferences;
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3 |
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4 | import java.util.List;
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5 | import java.util.Map;
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6 |
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7 | import org.openstreetmap.josm.tools.Logging;
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8 |
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9 | /**
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10 | * Abstract implementation of the {@link IPreferences} interface.
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11 | * @since 12847
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12 | */
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13 | public abstract class AbstractPreferences implements IPreferences {
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14 |
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15 | @Override
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16 | public synchronized String get(final String key, final String def) {
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17 | return getSetting(key, new StringSetting(def), StringSetting.class).getValue();
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18 | }
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19 |
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20 | @Override
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21 | public boolean put(final String key, String value) {
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22 | return putSetting(key, value == null || value.isEmpty() ? null : new StringSetting(value));
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23 | }
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24 |
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25 | @Override
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26 | public boolean getBoolean(final String key, final boolean def) {
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27 | return Boolean.parseBoolean(get(key, Boolean.toString(def)));
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28 | }
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29 |
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30 | @Override
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31 | public boolean putBoolean(final String key, final boolean value) {
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32 | return put(key, Boolean.toString(value));
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33 | }
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34 |
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35 | @Override
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36 | public synchronized int getInt(String key, int def) {
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37 | String v = get(key, Integer.toString(def));
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38 | if (v.isEmpty())
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39 | return def;
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40 |
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41 | try {
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42 | return Integer.parseInt(v);
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43 | } catch (NumberFormatException e) {
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44 | // fall out
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45 | Logging.trace(e);
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46 | }
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47 | return def;
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48 | }
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49 |
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50 | @Override
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51 | public boolean putInt(String key, int value) {
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52 | return put(key, Integer.toString(value));
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53 | }
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54 |
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55 | @Override
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56 | public long getLong(String key, long def) {
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57 | String v = get(key, Long.toString(def));
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58 | if (null == v)
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59 | return def;
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60 |
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61 | try {
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62 | return Long.parseLong(v);
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63 | } catch (NumberFormatException e) {
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64 | // fall out
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65 | Logging.trace(e);
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66 | }
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67 | return def;
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68 | }
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69 |
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70 | @Override
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71 | public boolean putLong(final String key, final long value) {
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72 | return put(key, Long.toString(value));
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73 | }
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74 |
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75 | @Override
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76 | public synchronized double getDouble(String key, double def) {
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77 | String v = get(key, Double.toString(def));
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78 | if (null == v)
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79 | return def;
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80 |
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81 | try {
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82 | return Double.parseDouble(v);
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83 | } catch (NumberFormatException e) {
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84 | // fall out
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85 | Logging.trace(e);
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86 | }
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87 | return def;
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88 | }
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89 |
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90 | @Override
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91 | public boolean putDouble(final String key, final double value) {
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92 | return put(key, Double.toString(value));
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93 | }
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94 |
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95 | @Override
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96 | public List<String> getList(String key, List<String> def) {
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97 | return getSetting(key, new ListSetting(def), ListSetting.class).getValue();
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98 | }
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99 |
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100 | @Override
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101 | public boolean putList(String key, List<String> value) {
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102 | return putSetting(key, value == null ? null : new ListSetting(value));
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103 | }
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104 |
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105 | @Override
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106 | public List<List<String>> getListOfLists(String key, List<List<String>> def) {
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107 | return getSetting(key, new ListListSetting(def), ListListSetting.class).getValue();
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108 | }
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109 |
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110 | @Override
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111 | public boolean putListOfLists(String key, List<List<String>> value) {
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112 | return putSetting(key, value == null ? null : new ListListSetting(value));
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113 | }
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114 |
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115 | @Override
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116 | public List<Map<String, String>> getListOfMaps(String key, List<Map<String, String>> def) {
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117 | return getSetting(key, new MapListSetting(def), MapListSetting.class).getValue();
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118 | }
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119 |
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120 | @Override
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121 | public boolean putListOfMaps(String key, List<Map<String, String>> value) {
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122 | return putSetting(key, value == null ? null : new MapListSetting(value));
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123 | }
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124 |
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125 | /**
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126 | * Set a value for a certain setting. The changed setting is saved to the preference file immediately.
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127 | * Due to caching mechanisms on modern operating systems and hardware, this shouldn't be a performance problem.
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128 | * @param key the unique identifier for the setting
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129 | * @param setting the value of the setting. In case it is null, the key-value entry will be removed.
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130 | * @return {@code true}, if something has changed (i.e. value is different than before)
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131 | */
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132 | public abstract boolean putSetting(String key, Setting<?> setting);
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133 |
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134 | /**
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135 | * Get settings value for a certain key and provide default a value.
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136 | * @param <T> the setting type
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137 | * @param key the identifier for the setting
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138 | * @param def the default value. For each call of getSetting() with a given key, the default value must be the same.
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139 | * <code>def</code> must not be null, but the value of <code>def</code> can be null.
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140 | * @param klass the setting type (same as T)
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141 | * @return the corresponding value if the property has been set before, {@code def} otherwise
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142 | */
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143 | public abstract <T extends Setting<?>> T getSetting(String key, T def, Class<T> klass);
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144 | }
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