薪水支付案例（2）

下面对各个用例进行详细分析

增加雇员

增加雇员采用命令模式（适用于数据库事务操作）
增加雇员将雇员的支付薪水时间表和他们的支付薪水类别关联起来

现在采用测试优先的方法去编写代码：由于是增量迭代的过程，所以代码只是部分片段，完整代码后期会上传至github以及csdn上

package salary;import implement.classification.CommissionedClassification;import implement.classification.HourlyClassification;import implement.classification.SalariedClassification;import implement.database.PayrollDatabase;import implement.transaction.AddCommissionedEmployee;import implement.transaction.AddHourlyEmployee;import implement.entity.Employee;import implement.method.HoldMethod;import implement.schedule.MonthlySchedule;import implement.transaction.AddSalariedEmployee;import org.junit.Test;import static org.junit.Assert.assertEquals;import static org.junit.Assert.assertNotNull;/** * 1.增加雇员测试 * Created by ZD on 2017/10/24. */public class AddEmployTransactionTest {    PayrollDatabase payrollDatabase = PayrollDatabase.getPayrollDatabase();/**增加正常雇员*/    @Test    public void testaddSalariedEmployee(){        int empId = 1;        String name = "Bob";        String address = "Bob.home";        double monthlyPay = 1000.0;        AddSalariedEmployee addSalariedEmployee = new AddSalariedEmployee(empId,name,address,monthlyPay);        addSalariedEmployee.execute();        Employee e = payrollDatabase.getEmployeeById(empId);        SalariedClassification salariedClassification = (SalariedClassification) e.getPaymentClassification();        MonthlySchedule monthlySchedule = (MonthlySchedule) e.getPaymentSchedule();        System.out.println(monthlySchedule.toString());        HoldMethod holdMethod = (HoldMethod) e.getPaymentMethod();        assertNotNull(e);    }/**增加钟点工*/    @Test    public void testaddHourlyEmployee(){        long id = 2;        String name = "Bobh";        String address = "Bobh.home";        double hourPay = 150;        AddHourlyEmployee addHourlyEmployee = new AddHourlyEmployee(id,name,address,hourPay);        addHourlyEmployee.execute();        Employee e = payrollDatabase.getEmployeeById(id);      assertEquals(e.getName(),name);        HourlyClassification classification = (HourlyClassification) e.getPaymentClassification();        assertEquals(hourPay,classification.getHourlyPay(),0.01);    }/**增加带薪雇员*/    @Test    public void testAddCommissionedEmployee(){        long id = 3;        String name = "Bob3";        String address = "Bob3.home";        double monthPay = 200;        double commissionRate = 5;        AddCommissionedEmployee addCommissionedEmployee = new AddCommissionedEmployee(id,name,address,monthPay,commissionRate);        addCommissionedEmployee.execute();        Employee e = payrollDatabase.getEmployeeById(id);      assertEquals(e.getName(),name);        CommissionedClassification commissionedClassification = (CommissionedClassification) e.getPaymentClassification();    }}

在上述测试用例中可知，有一个名为PayrollDatabase的类，该类用于存放所有Employee对象和所有Member对象，该类采用FACADE模式（为一组复杂而且全面的接口对象提供一个简单且特定的接口）

package implement.transaction;/** * 使用command模式定义一个Transaction基类来代表操作 * Created by ZD on 2017/10/24. */public interface Transaction {    public void execute();}

package implement.database;import implement.entity.Employee;import java.util.ArrayList;import java.util.EnumMap;import java.util.List;import java.util.concurrent.ConcurrentHashMap;/** * 利用外观模式 * 以empId为键，Employee为值 * 以memberId为键，empId为值 * Created by ZD on 2017/10/24. */public class PayrollDatabase {    private static PayrollDatabase payrollDatabase = new PayrollDatabase();    private ConcurrentHashMap<Long,Employee> employees = new ConcurrentHashMap<Long, Employee>();    public static PayrollDatabase getPayrollDatabase(){        return payrollDatabase;    }    public Employee getEmployeeById(long id){        return employees.get(id);    }    public void addEmployee(int empId,Employee e){        employees.put((long) empId,e);    }}

使用template模式来增加雇员

下面为增加雇员的动态模型：（这里默认的支付方式是从出纳手里获取支票）

下面给出部分代码：

package implement.transaction;import implement.classification.PaymentClassification;import implement.database.PayrollDatabase;import implement.entity.Employee;import implement.method.HoldMethod;import implement.method.PaymentMethod;import implement.schedule.PaymentSchedule;/** *采用模板模式实现 * Created by ZD on 2017/10/24. */public abstract class AddEmployeeTransaction implements Transaction {    private long id;    private String name;    private String address;    public AddEmployeeTransaction(){}    public AddEmployeeTransaction(long empid,String name,String address){        this.id = empid;        this.name = name;        this.address = address;    }    public void execute(){        PaymentClassification pc = getClassification();        PaymentSchedule ps = getSchdule();        PaymentMethod pm = getMethod();        Employee e = new Employee(id,name,address);        e.setClassification(pc);        e.setSchedule(ps);        e.setMethod(pm);        PayrollDatabase.getPayrollDatabase().addEmployee((int) id,e);    }    protected PaymentMethod getMethod(){        return new HoldMethod();    }    protected abstract PaymentSchedule getSchdule();    protected abstract PaymentClassification getClassification();}

下面展示其中AddHourlyEmployee代码：

package implement.transaction;import implement.classification.HourlyClassification;import implement.classification.PaymentClassification;import implement.schedule.PaymentSchedule;import implement.schedule.WeeklySchedule;/** * Created by ZD on 2017/10/24. */public class AddHourlyEmployee extends AddEmployeeTransaction {    private double hourlyPay;    public AddHourlyEmployee(long id,String name,String address,double hourlyPay){        super(id,name,address);        this.hourlyPay = hourlyPay;    }    protected PaymentSchedule getSchdule() {        return new WeeklySchedule();    }    protected PaymentClassification getClassification() {        return new HourlyClassification(hourlyPay);    }}