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org.apache.commons.configuration.ConfigurationConverter |
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1 | /* |
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2 | * Copyright 2001-2004 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.Enumeration; |
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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 | import java.util.Properties; |
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24 | import java.util.Vector; |
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25 | ||
26 | import org.apache.commons.collections.ExtendedProperties; |
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27 | ||
28 | /** |
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29 | * Configuration converter. Helper class to convert between Configuration, |
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30 | * ExtendedProperties and standard Properties. |
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31 | * |
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32 | * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a> |
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33 | * @version $Revision: 1.7 $, $Date: 2004/08/12 16:06:01 $ |
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34 | */ |
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35 | public final class ConfigurationConverter |
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36 | { |
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37 | private ConfigurationConverter() |
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38 | 0 | { |
39 | // to prevent instanciation... |
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40 | 0 | } |
41 | ||
42 | /** |
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43 | * Convert a ExtendedProperties class into a Configuration class. |
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44 | * |
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45 | * @param eprops ExtendedProperties object to convert |
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46 | * @return Configuration created from the ExtendedProperties |
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47 | */ |
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48 | public static Configuration getConfiguration(ExtendedProperties eprops) |
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49 | { |
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50 | 1 | Configuration config = new BaseConfiguration(); |
51 | ||
52 | 1 | Iterator keys = eprops.getKeys(); |
53 | ||
54 | 4 | while (keys.hasNext()) |
55 | { |
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56 | 3 | String key = (String) keys.next(); |
57 | 3 | config.setProperty(key, eprops.getProperty(key)); |
58 | } |
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59 | ||
60 | 1 | return config; |
61 | } |
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62 | ||
63 | /** |
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64 | * Convert a standard Properties class into a configuration class. |
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65 | * |
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66 | * @param props properties object to convert |
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67 | * @return Configuration configuration created from the Properties |
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68 | */ |
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69 | public static Configuration getConfiguration(Properties props) |
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70 | { |
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71 | 3 | Configuration config = new BaseConfiguration(); |
72 | ||
73 | 3 | Enumeration keys = props.keys(); |
74 | ||
75 | 104 | while (keys.hasMoreElements()) |
76 | { |
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77 | 101 | String key = (String) keys.nextElement(); |
78 | 101 | config.setProperty(key, props.getProperty(key)); |
79 | } |
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80 | ||
81 | 3 | return config; |
82 | } |
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83 | ||
84 | /** |
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85 | * Convert a Configuration class into a ExtendedProperties class. |
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86 | * |
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87 | * @param config Configuration object to convert |
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88 | * @return ExtendedProperties created from the Configuration |
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89 | */ |
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90 | public static ExtendedProperties getExtendedProperties(Configuration config) |
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91 | { |
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92 | 1 | ExtendedProperties props = new ExtendedProperties(); |
93 | ||
94 | 1 | Iterator keys = config.getKeys(); |
95 | ||
96 | 4 | while (keys.hasNext()) |
97 | { |
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98 | 3 | String key = (String) keys.next(); |
99 | 3 | Object property = config.getProperty(key); |
100 | ||
101 | // turn lists into vectors |
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102 | 3 | if (property instanceof List) |
103 | { |
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104 | 1 | property = new Vector((List) property); |
105 | } |
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106 | ||
107 | 3 | props.setProperty(key, property); |
108 | } |
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109 | ||
110 | 1 | return props; |
111 | } |
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112 | ||
113 | /** |
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114 | * Convert a Configuration class into a Properties class. Multivalue keys |
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115 | * will be collapsed into comma separated values. |
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116 | * |
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117 | * @param config Configuration object to convert |
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118 | * @return Properties created from the Configuration |
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119 | */ |
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120 | public static Properties getProperties(Configuration config) |
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121 | { |
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122 | 1 | Properties props = new Properties(); |
123 | ||
124 | 1 | Iterator keys = config.getKeys(); |
125 | ||
126 | 3 | while (keys.hasNext()) |
127 | { |
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128 | 2 | String key = (String) keys.next(); |
129 | 2 | List list = config.getList(key); |
130 | ||
131 | // turn lists into a string |
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132 | 2 | StringBuffer property = new StringBuffer(); |
133 | 2 | Iterator it = list.iterator(); |
134 | 5 | while (it.hasNext()) |
135 | { |
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136 | 3 | property.append(String.valueOf(it.next())); |
137 | 3 | if (it.hasNext()) |
138 | { |
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139 | 1 | property.append(", "); |
140 | } |
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141 | } |
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142 | ||
143 | 2 | props.setProperty(key, property.toString()); |
144 | } |
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145 | ||
146 | 1 | return props; |
147 | } |
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148 | ||
149 | /** |
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150 | * Convert a Configuration class into a Map class. |
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151 | * |
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152 | * @param config Configuration object to convert |
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153 | * @return Map created from the Configuration |
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154 | */ |
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155 | public static Map getMap(Configuration config) { |
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156 | 0 | return new ConfigurationMap(config); |
157 | } |
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158 | ||
159 | } |
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