1 /* 2 * Copyright (C) 2011 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 11 * express or implied. See the License for the specific language governing permissions and 12 * limitations under the License. 13 */ 14 15 package com.google.common.collect; 16 17 import com.google.common.annotations.GwtCompatible; 18 import java.io.Serializable; 19 import org.checkerframework.checker.nullness.qual.Nullable; 20 21 /** 22 * A mutable value of type {@code int}, for multisets to use in tracking counts of values. 23 * 24 * @author Louis Wasserman 25 */ 26 @GwtCompatible 27 final class Count implements Serializable { 28 private int value; 29 Count(int value)30 Count(int value) { 31 this.value = value; 32 } 33 get()34 public int get() { 35 return value; 36 } 37 add(int delta)38 public void add(int delta) { 39 value += delta; 40 } 41 addAndGet(int delta)42 public int addAndGet(int delta) { 43 return value += delta; 44 } 45 set(int newValue)46 public void set(int newValue) { 47 value = newValue; 48 } 49 getAndSet(int newValue)50 public int getAndSet(int newValue) { 51 int result = value; 52 value = newValue; 53 return result; 54 } 55 56 @Override hashCode()57 public int hashCode() { 58 return value; 59 } 60 61 @Override equals(@ullable Object obj)62 public boolean equals(@Nullable Object obj) { 63 return obj instanceof Count && ((Count) obj).value == value; 64 } 65 66 @Override toString()67 public String toString() { 68 return Integer.toString(value); 69 } 70 } 71