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}