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1 package com.db4o.f1.chapter4;
2
3 import java.util.*;
4
5 public class Car {
6 private String  model;
7 private Pilot pilot;
8 private List history;
9
10 public Car(String model) {
11 this.model=model;
12 this.pilot=null;
13 this.history=new ArrayList();
14 }
15
16 public Pilot getPilot() {
17 return pilot;
18 }
19
20 public void setPilot(Pilot pilot) {
21 this.pilot=pilot;
22 }
23
24 public String getModel() {
25 return model;
26 }
27
28 public SensorReadout[] getHistory() {
29 return (SensorReadout[])history.toArray(new SensorReadout[history.size()]);
30 }
31
32 public void snapshot() {
33 history.add(new TemperatureSensorReadout(
34 new Date(),this,"oil",pollOilTemperature()));
35 history.add(new TemperatureSensorReadout(
36 new Date(),this,"water",pollWaterTemperature()));
37 history.add(new PressureSensorReadout(
38 new Date(),this,"oil",pollOilPressure()));
39 }
40
41 protected double pollOilTemperature() {
42 return 0.1*history.size();
43 }
44
45 protected double pollWaterTemperature() {
46 return 0.2*history.size();
47 }
48
49 protected double pollOilPressure() {
50 return 0.3*history.size();
51 }
52
53 public String toString() {
54 return model+"["+pilot+"]/"+history.size();
55 }
56 } |
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Java API By Example, From Geeks To Geeks.