// Copyright 2012 Google Inc. All Rights Reserved.
//
// 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.collide.client.util.collections;
/**
* Object that is used for counting, how many times object is added to "bag".
*
* <p>New instance have counter equal to 1.
* <p>{@link #decrement()} returns {@code true} if counter reaches 0.
*/
final class Counter {
private int counter = 1;
public final void increment() {
counter++;
}
/**
* @return {@code true} if counter reaches 0.
*/
public final boolean decrement() {
counter--;
return counter == 0;
}
}