001 package org.fest.util; 002 003 /* 004 * Created on Sep 17, 2010 005 * 006 * Licensed under the Apache License, Version 2.0 (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 distributed under the License is distributed on 012 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the 013 * specific language governing permissions and limitations under the License. 014 * 015 * Copyright @2010-2011 the original author or authors. 016 */ 017 018 import static java.lang.reflect.Array.getLength; 019 020 import static org.fest.util.Collections.isEmpty; 021 022 import java.lang.reflect.Array; 023 import java.util.HashSet; 024 import java.util.Set; 025 026 /** 027 * Base implementation of {@link ComparisonStrategy} contract. 028 * 029 * @author Joel Costigliola 030 */ 031 public abstract class AbstractComparisonStrategy implements ComparisonStrategy { 032 033 public Iterable<?> duplicatesFrom(Iterable<?> iterable) { 034 Set<Object> duplicates = new HashSet<Object>(); 035 if (isEmpty(iterable)) return duplicates; 036 Set<Object> noDuplicates = new HashSet<Object>(); 037 for (Object element : iterable) { 038 if (iterableContains(noDuplicates, element)) { 039 duplicates.add(element); 040 continue; 041 } 042 noDuplicates.add(element); 043 } 044 return duplicates; 045 } 046 047 public boolean arrayContains(Object array, Object value) { 048 for (int i = 0; i < getLength(array); i++) { 049 Object element = Array.get(array, i); 050 if (areEqual(element, value)) return true; 051 } 052 return false; 053 } 054 055 public boolean isLessThan(Object actual, Object other) { 056 if (areEqual(actual, other)) return false; 057 return !isGreaterThan(actual, other); 058 } 059 060 public boolean isLessThanOrEqualTo(Object actual, Object other) { 061 if (areEqual(actual, other)) return true; 062 return isLessThan(actual, other); 063 } 064 065 public boolean isGreaterThanOrEqualTo(Object actual, Object other) { 066 if (areEqual(actual, other)) return true; 067 return isGreaterThan(actual, other); 068 } 069 070 }