Keshav: fix single responsibility principle violation

src/oops/SOLID/singleResponsibilityPrinciple/after/Employee.java

@@ -0,0 +1,60 @@
+package oops.SOLID.singleResponsibilityPrinciple.after;
+
+/*
+Models an employee form a business perspective
+ */
+public abstract class Employee {
+    private String firstName;
+    private String lastName;
+    private int monthlyIncome;
+    private int nbHoursPerWeek;
+
+    public Employee(String fullName, int monthlyIncome){
+        setMonthlyIncome(monthlyIncome);
+
+        String[] names = fullName.split(" ");
+        this.firstName = names[0];
+        this.lastName = names[1];
+    }
+
+    public String getEmail() {
+        return this.firstName + "." +
+                this.lastName +
+                "@globomanticshr.com";
+    }
+
+    @Override
+    public String toString() {
+        return this.firstName + " " +
+                this.lastName + " - " +
+                this.monthlyIncome;
+    }
+
+    public int getMonthlyIncome() {
+        return monthlyIncome;
+    }
+
+    public void setMonthlyIncome(int monthlyIncome) {
+        if(monthlyIncome < 0){
+            throw new IllegalArgumentException("Income must be positive");
+        }
+
+        this.monthlyIncome = monthlyIncome;
+    }
+
+    public int getNbHoursPerWeek() {
+        return nbHoursPerWeek;
+    }
+
+    public void setNbHoursPerWeek(int nbHoursPerWeek) {
+        if(nbHoursPerWeek <= 0){
+            throw new IllegalArgumentException("Income must be positive");
+        }
+
+        this.nbHoursPerWeek = nbHoursPerWeek;
+    }
+
+    public String getFullName(){
+        return this.firstName + " " + this.lastName;
+    }
+}

src/oops/SOLID/singleResponsibilityPrinciple/after/EmployeeRepository.java

@@ -0,0 +1,19 @@
+package oops.SOLID.singleResponsibilityPrinciple.after;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class EmployeeRepository {
+
+    public List<Employee> findAll(){
+
+        // Employees are kept in memory for simplicity
+        Employee anna = new FullTimeEmployee("Anna Smith", 2000);
+        Employee billy = new FullTimeEmployee("Billy Leech", 920);
+
+        Employee steve = new PartTimeEmployee("Steve Jones", 800);
+        Employee magda = new PartTimeEmployee("Magda Iovan", 920);
+
+        return Arrays.asList(anna, billy, steve, magda);
+    }
+}

src/oops/SOLID/singleResponsibilityPrinciple/after/FullTimeEmployee.java

@@ -0,0 +1,8 @@
+package oops.SOLID.singleResponsibilityPrinciple.after;
+
+public class FullTimeEmployee extends Employee {
+    public FullTimeEmployee(String fullName, int monthlyIncome) {
+        super(fullName, monthlyIncome);
+        this.setNbHoursPerWeek(40);
+    }
+}

src/oops/SOLID/singleResponsibilityPrinciple/after/PartTimeEmployee.java

@@ -0,0 +1,8 @@
+package oops.SOLID.singleResponsibilityPrinciple.after;
+
+public class PartTimeEmployee extends Employee {
+    public PartTimeEmployee(String fullName, int monthlyIncome) {
+        super(fullName, monthlyIncome);
+        this.setNbHoursPerWeek(20);
+    }
+}

src/oops/SOLID/singleResponsibilityPrinciple/after/SaveEmployeesMain.java

@@ -0,0 +1,17 @@
+package oops.SOLID.singleResponsibilityPrinciple.after;
+
+import java.util.List;
+
+public class SaveEmployeesMain {
+    public static void main(String[] args) {
+        // Grab employees
+        EmployeeRepository repository = new EmployeeRepository();
+        SaveToDisk util = new SaveToDisk();
+        List<Employee> employees = repository.findAll();
+
+        // Save all
+        for (Employee e : employees){
+            util.saveEmployee(e);
+        }
+    }
+}

src/oops/SOLID/singleResponsibilityPrinciple/after/SaveToDisk.java

@@ -0,0 +1,40 @@
+package oops.SOLID.singleResponsibilityPrinciple.after;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+public class SaveToDisk{
+    public void saveEmployee(Employee employee){
+        try {
+            StringBuilder employeeFileDetails = saveEmployeeHelper(employee);
+            Path path = Paths.get(employee.getFullName()
+                    .replace(" ","_") + ".rec");
+            Files.write(path, employeeFileDetails.toString().getBytes());
+
+            System.out.println("Saved employee " + employee.toString());
+        } catch (IOException e){
+            System.out.println("ERROR: Could not save employee. " + e);
+        }
+    }
+    private StringBuilder saveEmployeeHelper(Employee employee){
+        StringBuilder sb = new StringBuilder();
+        String [] fullName = employee.getFullName().split(" ");
+        sb.append("### EMPLOYEE RECORD ####");
+        sb.append(System.lineSeparator());
+        sb.append("NAME: ");
+        sb.append(fullName[0] + " " + fullName[1]);
+        sb.append(System.lineSeparator());
+        sb.append("POSITION: ");
+        sb.append(employee.getClass().getTypeName());
+        sb.append(System.lineSeparator());
+        sb.append("EMAIL: ");
+        sb.append(employee.getEmail());
+        sb.append(System.lineSeparator());
+        sb.append("MONTHLY WAGE: ");
+        sb.append(employee.getMonthlyIncome());
+        sb.append(System.lineSeparator());
+        return sb;
+    }
+}