Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
PropertiesExpander |
|
| 2.0;2 |
1 | //////////////////////////////////////////////////////////////////////////////// | |
2 | // checkstyle: Checks Java source code for adherence to a set of rules. | |
3 | // Copyright (C) 2001-2014 Oliver Burn | |
4 | // | |
5 | // This library is free software; you can redistribute it and/or | |
6 | // modify it under the terms of the GNU Lesser General Public | |
7 | // License as published by the Free Software Foundation; either | |
8 | // version 2.1 of the License, or (at your option) any later version. | |
9 | // | |
10 | // This library is distributed in the hope that it will be useful, | |
11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | // Lesser General Public License for more details. | |
14 | // | |
15 | // You should have received a copy of the GNU Lesser General Public | |
16 | // License along with this library; if not, write to the Free Software | |
17 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | //////////////////////////////////////////////////////////////////////////////// | |
19 | package com.puppycrawl.tools.checkstyle; | |
20 | ||
21 | import java.util.Properties; | |
22 | ||
23 | /** | |
24 | * Resolves external properties from an | |
25 | * underlying <code>Properties</code> object. | |
26 | * | |
27 | * @author lkuehne | |
28 | */ | |
29 | public final class PropertiesExpander | |
30 | implements PropertyResolver | |
31 | { | |
32 | /** the underlying Properties object. */ | |
33 | private final Properties mProperties; | |
34 | ||
35 | /** | |
36 | * Creates a new PropertiesExpander. | |
37 | * @param aProperties the underlying properties to use for | |
38 | * property resolution. | |
39 | * @throws IllegalArgumentException indicates null was passed | |
40 | */ | |
41 | public PropertiesExpander(Properties aProperties) | |
42 | 35 | { |
43 | 35 | if (aProperties == null) { |
44 | 0 | throw new IllegalArgumentException("cannot pass null"); |
45 | } | |
46 | 35 | mProperties = aProperties; |
47 | 35 | } |
48 | ||
49 | /** {@inheritDoc} */ | |
50 | public String resolve(String aPropertyName) | |
51 | { | |
52 | 25 | return mProperties.getProperty(aPropertyName); |
53 | } | |
54 | } |