01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.configuration;
19:
20: import java.util.Iterator;
21:
22: /**
23: * Strict comparator for configurations.
24: *
25: * @since 1.0
26: *
27: * @author <a href="mailto:herve.quiroz@esil.univ-mrs.fr">Herve Quiroz</a>
28: * @author <a href="mailto:shapira@mpi.com">Yoav Shapira</a>
29: * @version $Revision: 439648 $, $Date: 2006-09-02 22:42:10 +0200 (Sa, 02 Sep 2006) $
30: */
31: public class StrictConfigurationComparator implements
32: ConfigurationComparator {
33: /**
34: * Create a new strict comparator.
35: */
36: public StrictConfigurationComparator() {
37: }
38:
39: /**
40: * Compare two configuration objects.
41: *
42: * @param a the first configuration
43: * @param b the second configuration
44: * @return true if keys from a are found in b and keys from b are
45: * found in a and for each key in a, the corresponding value
46: * is the sale in for the same key in b
47: */
48: public boolean compare(Configuration a, Configuration b) {
49: if (a == null && b == null) {
50: return true;
51: } else if (a == null || b == null) {
52: return false;
53: }
54:
55: for (Iterator keys = a.getKeys(); keys.hasNext();) {
56: String key = (String) keys.next();
57: Object value = a.getProperty(key);
58: if (!value.equals(b.getProperty(key))) {
59: return false;
60: }
61: }
62:
63: for (Iterator keys = b.getKeys(); keys.hasNext();) {
64: String key = (String) keys.next();
65: Object value = b.getProperty(key);
66: if (!value.equals(a.getProperty(key))) {
67: return false;
68: }
69: }
70:
71: return true;
72: }
73: }
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