1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.configuration2.spring;
19
20 import java.util.ArrayList;
21 import java.util.List;
22
23 import org.apache.commons.configuration2.Configuration;
24 import org.apache.commons.lang3.ArrayUtils;
25 import org.springframework.core.env.EnumerablePropertySource;
26
27 /**
28 * Allow use of Apache Commons Configuration Objects as Spring PropertySources
29 */
30 public class ConfigurationPropertySource extends EnumerablePropertySource<Configuration> {
31
32 /**
33 * Constructs a new instance.
34 *
35 * @param name the associated name.
36 */
37 protected ConfigurationPropertySource(final String name) {
38 super(name);
39 }
40
41 /**
42 * Constructs a new instance.
43 *
44 * @param name the associated name.
45 * @param source the source object.
46 */
47 public ConfigurationPropertySource(final String name, final Configuration source) {
48 super(name, source);
49 }
50
51 @Override
52 public Object getProperty(final String name) {
53 if (source.getProperty(name) == null) {
54 return null;
55 }
56 final String[] propValue = source.getStringArray(name);
57 if (propValue == null || propValue.length == 0) {
58 return "";
59 }
60 if (propValue.length == 1) {
61 return propValue[0];
62 }
63 return propValue;
64 }
65
66 @Override
67 public String[] getPropertyNames() {
68 final List<String> keys = new ArrayList<>();
69 source.getKeys().forEachRemaining(keys::add);
70 return keys.toArray(ArrayUtils.EMPTY_STRING_ARRAY);
71 }
72 }