1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.fulcrum.yaafi.framework.configuration;
20
21 import java.util.Properties;
22
23 /**
24 * A implementation to provide out-of-the-box component configuration properties
25 * using the following algorithm:
26 *
27 * <ul>
28 * <li>add the user-supplied defaults to the result<li>
29 * <li>add the system properties to the result<li>
30 * <li>add the Merlin context entries to the result<li>
31 * </ul>
32 *
33 * @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
34 */
35 public class ComponentConfigurationPropertiesResolverImpl
36 extends ComponentConfigurationPropertiesResolverBaseImpl
37 {
38 /**
39 * @see org.apache.fulcrum.yaafi.framework.configuration.ComponentConfigurationPropertiesResolver#resolve(java.util.Properties)
40 */
41 public Properties resolve(Properties defaults) throws Exception
42 {
43 String location = this.getLocation();
44 Properties result = this.loadProperties(location);
45
46 if(defaults != null)
47 {
48 result.putAll(defaults);
49 }
50
51 result.putAll(System.getProperties());
52 this.addAvalonContext(result);
53
54 return result;
55 }
56 }