sviolet.thistle.model.math.BallotTicket Maven / Gradle / Ivy
/*
* Copyright (C) 2015-2017 S.Violet
*
* 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.
*
* Project GitHub: https://github.com/shepherdviolet/thistle
* Email: [email protected]
*/
package sviolet.thistle.model.math;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
/**
* Ballot Ticket
*
* @author S.Violet
*/
public class BallotTicket {
private AtomicReference ballotBox;
private AtomicBoolean value;
public BallotTicket(boolean initialValue){
this.ballotBox = new AtomicReference<>(null);
this.value = new AtomicBoolean(initialValue);
}
public void bind(BallotBox ballotBox){
if (ballotBox == null){
return;
}
if (this.ballotBox.compareAndSet(null, ballotBox)) {
if (value.get()) {
ballotBox.increase();
}
}
}
public boolean getValue(){
return value.get();
}
public void pro(){
if (value.compareAndSet(false, true)){
BallotBox ballotBox = this.ballotBox.get();
if (ballotBox != null) {
ballotBox.increase();
}
}
}
public void con(){
if (value.compareAndSet(true, false)){
BallotBox ballotBox = this.ballotBox.get();
if (ballotBox != null) {
ballotBox.decrease();
}
}
}
}