001/* 002 * Copyright (C) 2010 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; 018 019import com.google.common.annotations.GwtCompatible; 020import java.io.Serializable; 021import org.checkerframework.checker.nullness.qual.Nullable; 022 023/** 024 * Simple base class to verify that we handle generics correctly. 025 * 026 * @author Kevin Bourrillion 027 */ 028@GwtCompatible 029public class BaseComparable implements Comparable<BaseComparable>, Serializable { 030 private final String s; 031 032 public BaseComparable(String s) { 033 this.s = s; 034 } 035 036 @Override 037 public int hashCode() { // delegate to 's' 038 return s.hashCode(); 039 } 040 041 @Override 042 public boolean equals(@Nullable Object other) { 043 if (other == null) { 044 return false; 045 } else if (other instanceof BaseComparable) { 046 return s.equals(((BaseComparable) other).s); 047 } else { 048 return false; 049 } 050 } 051 052 @Override 053 public int compareTo(BaseComparable o) { 054 return s.compareTo(o.s); 055 } 056 057 private static final long serialVersionUID = 0; 058}