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 /** 031 * Create a new strict comparator. 032 */ 033 public StrictConfigurationComparator() 034 { 035 } 036 037 /** 038 * Compare two configuration objects. 039 * 040 * @param a the first configuration 041 * @param b the second configuration 042 * @return true if keys from a are found in b and keys from b are 043 * found in a and for each key in a, the corresponding value 044 * is the sale in for the same key in b 045 */ 046 @Override 047 public boolean compare(final Configuration a, final Configuration b) 048 { 049 if (a == null && b == null) 050 { 051 return true; 052 } 053 else if (a == null || b == null) 054 { 055 return false; 056 } 057 058 for (final Iterator<String> keys = a.getKeys(); keys.hasNext();) 059 { 060 final String key = keys.next(); 061 final Object value = a.getProperty(key); 062 if (!value.equals(b.getProperty(key))) 063 { 064 return false; 065 } 066 } 067 068 for (final Iterator<String> keys = b.getKeys(); keys.hasNext();) 069 { 070 final String key = keys.next(); 071 final Object value = b.getProperty(key); 072 if (!value.equals(a.getProperty(key))) 073 { 074 return false; 075 } 076 } 077 078 return true; 079 } 080}