1 * Implementation Notes:
2 * 1. String prefix = configName + ".";
3 * 2. Create Properties instance for inner configuration:
4 * result = new Properties();
5 * 3. For each (String key; String value) from properties do:
6 * 3.1. If key.startsWith(prefix) then
7 * 3.1.1. Remove the prefix from the key:
8 * String newKey = key.substring(prefix.length());
9 * 3.1.2. Put key/value pair to the inner configuration:
10 * result.put(newKey, value);
11 * 4. Return result.
12 * @param configName the name of the inner configuration
13 * @param properties the properties with the main configuration
14 * @return the Properties container with the extracted inner configuration (not null)
15 */
16 public static Properties getSubConfiguration(Properties properties, String configName) {
17 String prefix = configName + ".";
18 Properties result = new Properties();
19 Enumeration enumer = properties.keys();
20 while(enumer.hasMoreElements()) {
21 String key = (String) enumer.nextElement();
22 String value = properties.getProperty(key);
23 if(key.startsWith(prefix)){
24 String newKey = key.substring(prefix.length());
25 result.put(newKey, value);
26 }
27 }
28 return result;
29 }