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| 1 | +package io.github.dunwu.leetcode; |
| 2 | + |
| 3 | +import java.time.LocalDateTime; |
| 4 | +import java.time.ZoneOffset; |
| 5 | +import java.util.concurrent.TimeUnit; |
| 6 | +import java.util.concurrent.atomic.AtomicInteger; |
| 7 | +import java.util.concurrent.atomic.AtomicLong; |
| 8 | + |
| 9 | +/** |
| 10 | + * @author <a href="mailto:forbreak@163.com">Zhang Peng</a> |
| 11 | + * @since 2020-05-13 |
| 12 | + */ |
| 13 | +public class Parklot { |
| 14 | + |
| 15 | + private volatile AtomicInteger space; |
| 16 | + private volatile AtomicLong sum; |
| 17 | + private volatile int MAX = 1000; |
| 18 | + |
| 19 | + public boolean enter(Car car) { |
| 20 | + if (space.get() >= MAX) { |
| 21 | + // reject |
| 22 | + return false; |
| 23 | + } |
| 24 | + |
| 25 | + // TODO 判断车类型 |
| 26 | + |
| 27 | + car.enter(); |
| 28 | + space.getAndIncrement(); |
| 29 | + return true; |
| 30 | + } |
| 31 | + |
| 32 | + public long exit(Car car) { |
| 33 | + if (space.get() >= MAX) { |
| 34 | + // reject |
| 35 | + return 0L; |
| 36 | + } |
| 37 | + |
| 38 | + // TODO 判断车类型 |
| 39 | + car.exit(); |
| 40 | + long money = car.money(); |
| 41 | + // 扣费 |
| 42 | + space.getAndDecrement(); |
| 43 | + sum.getAndAdd(money); |
| 44 | + return money; |
| 45 | + } |
| 46 | + |
| 47 | + public void getSum() { |
| 48 | + |
| 49 | + } |
| 50 | + |
| 51 | + public interface Parking { |
| 52 | + |
| 53 | + enum Type { |
| 54 | + car, |
| 55 | + truck |
| 56 | + } |
| 57 | + |
| 58 | + int getPrice(); |
| 59 | + |
| 60 | + int getMax(); |
| 61 | + |
| 62 | + void enter(); |
| 63 | + |
| 64 | + void exit(); |
| 65 | + |
| 66 | + LocalDateTime getBeginTime(); |
| 67 | + |
| 68 | + LocalDateTime getEndTime(); |
| 69 | + |
| 70 | + default long money() { |
| 71 | + if (getEndTime() == null) { |
| 72 | + return 0; |
| 73 | + } |
| 74 | + long l2 = getEndTime().toEpochSecond(ZoneOffset.UTC); |
| 75 | + long l1 = getBeginTime().toEpochSecond(ZoneOffset.UTC); |
| 76 | + long time = l2 - l1; |
| 77 | + long hours = TimeUnit.NANOSECONDS.toHours(time); |
| 78 | + long total = getPrice() * hours; |
| 79 | + return Math.min(total, getMax()); |
| 80 | + } |
| 81 | + |
| 82 | + } |
| 83 | + |
| 84 | + public abstract class Car implements Parking { |
| 85 | + |
| 86 | + private static final int price = 5; |
| 87 | + private static final int max = 60; |
| 88 | + private LocalDateTime beginTime; |
| 89 | + private LocalDateTime endTime; |
| 90 | + |
| 91 | + @Override |
| 92 | + public int getPrice() { |
| 93 | + return price; |
| 94 | + } |
| 95 | + |
| 96 | + @Override |
| 97 | + public int getMax() { |
| 98 | + return max; |
| 99 | + } |
| 100 | + |
| 101 | + @Override |
| 102 | + public void enter() { |
| 103 | + beginTime = LocalDateTime.now(); |
| 104 | + } |
| 105 | + |
| 106 | + @Override |
| 107 | + public void exit() { |
| 108 | + endTime = LocalDateTime.now(); |
| 109 | + } |
| 110 | + |
| 111 | + @Override |
| 112 | + public LocalDateTime getBeginTime() { |
| 113 | + return beginTime; |
| 114 | + } |
| 115 | + |
| 116 | + @Override |
| 117 | + public LocalDateTime getEndTime() { |
| 118 | + return endTime; |
| 119 | + } |
| 120 | + |
| 121 | + } |
| 122 | + |
| 123 | + public class LittleCar extends Car { |
| 124 | + |
| 125 | + private static final int price = 5; |
| 126 | + private static final int max = 60; |
| 127 | + |
| 128 | + @Override |
| 129 | + public int getPrice() { |
| 130 | + return price; |
| 131 | + } |
| 132 | + |
| 133 | + @Override |
| 134 | + public int getMax() { |
| 135 | + return max; |
| 136 | + } |
| 137 | + |
| 138 | + } |
| 139 | + |
| 140 | + public class Truck extends Car implements Parking { |
| 141 | + |
| 142 | + private static final int price = 10; |
| 143 | + private static final int max = 120; |
| 144 | + |
| 145 | + @Override |
| 146 | + public int getPrice() { |
| 147 | + return price; |
| 148 | + } |
| 149 | + |
| 150 | + @Override |
| 151 | + public int getMax() { |
| 152 | + return max; |
| 153 | + } |
| 154 | + |
| 155 | + } |
| 156 | + |
| 157 | +} |
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