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org.apache.commons.configuration.MapConfiguration |
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1 | /* |
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2 | * Copyright 2004-2005 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License") |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | ||
17 | package org.apache.commons.configuration; |
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18 | ||
19 | import java.util.ArrayList; |
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20 | import java.util.Iterator; |
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21 | import java.util.List; |
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22 | import java.util.Map; |
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23 | ||
24 | /** |
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25 | * A Map based Configuration. |
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26 | * |
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27 | * @author Emmanuel Bourg |
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28 | * @version $Revision$, $Date: 2005-10-09 20:27:12 +0200 (Sun, 09 Oct 2005) $ |
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29 | * @since 1.1 |
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30 | */ |
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31 | public class MapConfiguration extends AbstractConfiguration |
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32 | { |
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33 | /** The Map decorated by this configuration. */ |
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34 | protected Map map; |
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35 | ||
36 | /** |
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37 | * Create a Configuration decorator around the specified Map. The map is |
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38 | * used to store the configuration properties, any change will also affect |
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39 | * the Map. |
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40 | * |
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41 | * @param map the map |
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42 | */ |
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43 | public MapConfiguration(Map map) |
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44 | 45 | { |
45 | 45 | this.map = map; |
46 | 45 | } |
47 | ||
48 | /** |
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49 | * Return the Map decorated by this configuration. |
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50 | * |
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51 | * @return the map this configuration is based onto |
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52 | */ |
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53 | public Map getMap() |
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54 | { |
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55 | 3 | return map; |
56 | } |
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57 | ||
58 | public Object getProperty(String key) |
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59 | { |
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60 | 384 | Object value = map.get(key); |
61 | 384 | if (value instanceof String) |
62 | { |
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63 | 186 | List list = PropertyConverter.split((String) value, getDelimiter()); |
64 | 186 | return list.size() > 1 ? list : value; |
65 | } |
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66 | else |
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67 | { |
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68 | 198 | return value; |
69 | } |
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70 | } |
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71 | ||
72 | protected void addPropertyDirect(String key, Object value) |
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73 | { |
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74 | 9 | Object previousValue = getProperty(key); |
75 | ||
76 | 9 | if (previousValue == null) |
77 | { |
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78 | 3 | map.put(key, value); |
79 | } |
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80 | 6 | else if (previousValue instanceof List) |
81 | { |
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82 | // the value is added to the existing list |
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83 | 3 | ((List) previousValue).add(value); |
84 | } |
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85 | else |
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86 | { |
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87 | // the previous value is replaced by a list containing the previous value and the new value |
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88 | 3 | List list = new ArrayList(); |
89 | 3 | list.add(previousValue); |
90 | 3 | list.add(value); |
91 | ||
92 | 3 | map.put(key, list); |
93 | } |
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94 | 9 | } |
95 | ||
96 | public boolean isEmpty() |
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97 | { |
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98 | 6 | return map.isEmpty(); |
99 | } |
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100 | ||
101 | public boolean containsKey(String key) |
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102 | { |
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103 | 15 | return map.containsKey(key); |
104 | } |
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105 | ||
106 | public void clearProperty(String key) |
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107 | { |
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108 | 3 | map.remove(key); |
109 | 3 | } |
110 | ||
111 | public Iterator getKeys() |
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112 | { |
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113 | 6 | return map.keySet().iterator(); |
114 | } |
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115 | } |
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