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 19 import java.io.Serializable; 20 21 import javax.annotation.Nullable; 22 23 /** 24 * A mutable value of type {@code int}, for multisets to use in tracking counts of values. 25 * 26 * @author Louis Wasserman 27 */ 28 @GwtCompatible 29 final class Count implements Serializable { 30 private int value; 31 32 Count(int value) { 33 this.value = value; 34 } 35 36 public int get() { 37 return value; 38 } 39 40 public int getAndAdd(int delta) { 41 int result = value; 42 value = result + delta; 43 return result; 44 } 45 46 public int addAndGet(int delta) { 47 return value += delta; 48 } 49 50 public void set(int newValue) { 51 value = newValue; 52 } 53 54 public int getAndSet(int newValue) { 55 int result = value; 56 value = newValue; 57 return result; 58 } 59 60 @Override 61 public int hashCode() { 62 return value; 63 } 64 65 @Override 66 public boolean equals(@Nullable Object obj) { 67 return obj instanceof Count && ((Count) obj).value == value; 68 } 69 70 @Override 71 public String toString() { 72 return Integer.toString(value); 73 } 74 } 75
