001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.commons.configuration2; 019 020import java.util.Iterator; 021 022/** 023 * Strict comparator for configurations. 024 * 025 * @since 1.0 026 * 027 */ 028public class StrictConfigurationComparator implements ConfigurationComparator { 029 /** 030 * Create a new strict comparator. 031 */ 032 public StrictConfigurationComparator() { 033 } 034 035 /** 036 * Compare two configuration objects. 037 * 038 * @param a the first configuration 039 * @param b the second configuration 040 * @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 041 * value is the sale in for the same key in b 042 */ 043 @Override 044 public boolean compare(final Configuration a, final Configuration b) { 045 if (a == null && b == null) { 046 return true; 047 } 048 if (a == null || b == null) { 049 return false; 050 } 051 052 for (final Iterator<String> keys = a.getKeys(); keys.hasNext();) { 053 final String key = keys.next(); 054 final Object value = a.getProperty(key); 055 if (!value.equals(b.getProperty(key))) { 056 return false; 057 } 058 } 059 060 for (final Iterator<String> keys = b.getKeys(); keys.hasNext();) { 061 final String key = keys.next(); 062 final Object value = b.getProperty(key); 063 if (!value.equals(a.getProperty(key))) { 064 return false; 065 } 066 } 067 068 return true; 069 } 070}