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org.apache.commons.configuration.ConfigurationConverter |
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1 | /* |
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2 | * Copyright 2001-2005 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.Iterator; |
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20 | import java.util.List; |
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21 | import java.util.Map; |
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22 | import java.util.Properties; |
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23 | import java.util.Vector; |
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24 | ||
25 | import org.apache.commons.collections.ExtendedProperties; |
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26 | import org.apache.commons.lang.StringUtils; |
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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 $Revision$, $Date: 2005-10-03 20:12:54 +0200 (Mon, 03 Oct 2005) $ |
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34 | */ |
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35 | public final class ConfigurationConverter |
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36 | { |
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37 | /** |
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38 | * Private constructor prevents instances from being created. |
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39 | */ |
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40 | private ConfigurationConverter() |
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41 | 0 | { |
42 | // to prevent instanciation... |
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43 | 0 | } |
44 | ||
45 | /** |
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46 | * Convert a ExtendedProperties class into a Configuration class. |
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47 | * |
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48 | * @param eprops ExtendedProperties object to convert |
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49 | * @return Configuration created from the ExtendedProperties |
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50 | */ |
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51 | public static Configuration getConfiguration(ExtendedProperties eprops) |
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52 | { |
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53 | 3 | return new MapConfiguration(eprops); |
54 | } |
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55 | ||
56 | /** |
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57 | * Convert a standard Properties class into a configuration class. |
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58 | * |
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59 | * @param props properties object to convert |
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60 | * @return Configuration configuration created from the Properties |
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61 | */ |
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62 | public static Configuration getConfiguration(Properties props) |
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63 | { |
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64 | 9 | return new MapConfiguration(props); |
65 | } |
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66 | ||
67 | /** |
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68 | * Convert a Configuration class into a ExtendedProperties class. |
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69 | * |
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70 | * @param config Configuration object to convert |
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71 | * @return ExtendedProperties created from the Configuration |
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72 | */ |
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73 | public static ExtendedProperties getExtendedProperties(Configuration config) |
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74 | { |
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75 | 3 | ExtendedProperties props = new ExtendedProperties(); |
76 | ||
77 | 3 | Iterator keys = config.getKeys(); |
78 | ||
79 | 15 | while (keys.hasNext()) |
80 | { |
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81 | 9 | String key = (String) keys.next(); |
82 | 9 | Object property = config.getProperty(key); |
83 | ||
84 | // turn lists into vectors |
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85 | 9 | if (property instanceof List) |
86 | { |
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87 | 3 | property = new Vector((List) property); |
88 | } |
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89 | ||
90 | 9 | props.setProperty(key, property); |
91 | } |
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92 | ||
93 | 3 | return props; |
94 | } |
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95 | ||
96 | /** |
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97 | * Convert a Configuration class into a Properties class. List properties |
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98 | * are joined into a string using the delimiter of the configuration if it |
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99 | * extends AbstractConfiguration, and a comma otherwise. |
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100 | * |
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101 | * @param config Configuration object to convert |
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102 | * @return Properties created from the Configuration |
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103 | */ |
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104 | public static Properties getProperties(Configuration config) |
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105 | { |
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106 | 6 | Properties props = new Properties(); |
107 | ||
108 | 6 | char delimiter = (config instanceof AbstractConfiguration) |
109 | ? ((AbstractConfiguration) config).getDelimiter() : ','; |
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110 | ||
111 | 6 | Iterator keys = config.getKeys(); |
112 | 36 | while (keys.hasNext()) |
113 | { |
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114 | 24 | String key = (String) keys.next(); |
115 | 24 | List list = config.getList(key); |
116 | ||
117 | // turn the list into a string |
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118 | 24 | props.setProperty(key, StringUtils.join(list.iterator(), delimiter)); |
119 | } |
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120 | ||
121 | 6 | return props; |
122 | } |
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123 | ||
124 | /** |
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125 | * Convert a Configuration class into a Map class. |
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126 | * |
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127 | * @param config Configuration object to convert |
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128 | * @return Map created from the Configuration |
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129 | */ |
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130 | public static Map getMap(Configuration config) |
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131 | { |
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132 | 3 | return new ConfigurationMap(config); |
133 | } |
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134 | ||
135 | } |
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