001/* 002 * Copyright (C) 2008 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.google.common.collect.testing.features; 018 019import com.google.common.annotations.GwtCompatible; 020import com.google.common.collect.testing.Helpers; 021import java.util.Collections; 022import java.util.Set; 023 024/** 025 * Encapsulates the constraints that a class under test must satisfy in order for a tester method to 026 * be run against that class. 027 * 028 * @author George van den Driessche 029 */ 030@GwtCompatible 031public final class TesterRequirements { 032 private final Set<Feature<?>> presentFeatures; 033 private final Set<Feature<?>> absentFeatures; 034 035 public TesterRequirements(Set<Feature<?>> presentFeatures, Set<Feature<?>> absentFeatures) { 036 this.presentFeatures = Helpers.copyToSet(presentFeatures); 037 this.absentFeatures = Helpers.copyToSet(absentFeatures); 038 } 039 040 public TesterRequirements(TesterRequirements tr) { 041 this(tr.getPresentFeatures(), tr.getAbsentFeatures()); 042 } 043 044 public TesterRequirements() { 045 this(Collections.<Feature<?>>emptySet(), Collections.<Feature<?>>emptySet()); 046 } 047 048 public final Set<Feature<?>> getPresentFeatures() { 049 return presentFeatures; 050 } 051 052 public final Set<Feature<?>> getAbsentFeatures() { 053 return absentFeatures; 054 } 055 056 @Override 057 public boolean equals(Object object) { 058 if (object == this) { 059 return true; 060 } 061 if (object instanceof TesterRequirements) { 062 TesterRequirements that = (TesterRequirements) object; 063 return this.presentFeatures.equals(that.presentFeatures) 064 && this.absentFeatures.equals(that.absentFeatures); 065 } 066 return false; 067 } 068 069 @Override 070 public int hashCode() { 071 return presentFeatures.hashCode() * 31 + absentFeatures.hashCode(); 072 } 073 074 @Override 075 public String toString() { 076 return "{TesterRequirements: present=" + presentFeatures + ", absent=" + absentFeatures + "}"; 077 } 078 079 private static final long serialVersionUID = 0; 080}