/*
    * Copyright (C) 2011 The Guava Authors
    *
    * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
    * in compliance with the License. You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software distributed under the
   * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
   * express or implied. See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.common.collect;
  
  import com.google.common.annotations.GwtCompatible;
  
  import java.io.Serializable;
  
  import javax.annotation.Nullable;
  
  /**
   * A mutable value of type {@code int}, for multisets to use in tracking counts of values.
   *
   * @author Louis Wasserman
   */
  @GwtCompatible
  final class Count implements Serializable {
    private int value;
  
    Count(int value) {
      this.value = value;
    }
  
    public int get() {
      return value;
    }
  
    public int getAndAdd(int delta) {
      int result = value;
      value = result + delta;
      return result;
    }
  
    public int addAndGet(int delta) {
      return value += delta;
    }
  
    public void set(int newValue) {
      value = newValue;
    }
  
    public int getAndSet(int newValue) {
      int result = value;
      value = newValue;
      return result;
    }
  
    @Override
    public int hashCode() {
      return value;
    }
  
    @Override
    public boolean equals(@Nullable Object obj) {
      return obj instanceof Count && ((Count) obj).value == value;
    }
  
    @Override
    public String toString() {
      return Integer.toString(value);
    }
  }