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 * http://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 * Create a new strict comparator.
30 */
31 public StrictConfigurationComparator() {
32 }
33
34 /**
35 * Compare two configuration objects.
36 *
37 * @param a the first configuration
38 * @param b the second configuration
39 * @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
40 * value is the sale in for the same key in b
41 */
42 @Override
43 public boolean compare(final Configuration a, final Configuration b) {
44 if (a == null && b == null) {
45 return true;
46 }
47 if (a == null || b == null) {
48 return false;
49 }
50
51 for (final Iterator<String> keys = a.getKeys(); keys.hasNext();) {
52 final String key = keys.next();
53 final Object value = a.getProperty(key);
54 if (!value.equals(b.getProperty(key))) {
55 return false;
56 }
57 }
58
59 for (final Iterator<String> keys = b.getKeys(); keys.hasNext();) {
60 final String key = keys.next();
61 final Object value = b.getProperty(key);
62 if (!value.equals(a.getProperty(key))) {
63 return false;
64 }
65 }
66
67 return true;
68 }
69 }