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;
19
20 import java.util.Iterator;
21
22 /**
23 * Strict comparator for configurations.
24 *
25 * @since 1.0
26 */
27 public class StrictConfigurationComparator implements ConfigurationComparator {
28
29 /**
30 * Create a new strict comparator.
31 */
32 public StrictConfigurationComparator() {
33 }
34
35 /**
36 * Compare two configuration objects.
37 *
38 * @param a the first configuration
39 * @param b the second configuration
40 * @return true if keys from a are found in b and keys from b are found in a and for each key in a, the corresponding
41 * value is the sale in for the same key in b
42 */
43 @Override
44 public boolean compare(final Configuration a, final Configuration b) {
45 if (a == null && b == null) {
46 return true;
47 }
48 if (a == null || b == null) {
49 return false;
50 }
51
52 for (final Iterator<String> keys = a.getKeys(); keys.hasNext();) {
53 final String key = keys.next();
54 final Object value = a.getProperty(key);
55 if (!value.equals(b.getProperty(key))) {
56 return false;
57 }
58 }
59
60 for (final Iterator<String> keys = b.getKeys(); keys.hasNext();) {
61 final String key = keys.next();
62 final Object value = b.getProperty(key);
63 if (!value.equals(a.getProperty(key))) {
64 return false;
65 }
66 }
67
68 return true;
69 }
70 }