Batch : ACADEMY OCT-NOV 20 SUPERX , LLD1 , email : [email protected]

Anna_Smith.rec

@@ -0,0 +1,5 @@
+### EMPLOYEE RECORD ####
+NAME: Anna Smith
+POSITION: oops.SOLID.singleResponsibilityPrinciple.before.FullTimeEmployee
+EMAIL: [email protected]
+MONTHLY WAGE: 2000

Billy_Leech.rec

@@ -0,0 +1,5 @@
+### EMPLOYEE RECORD ####
+NAME: Billy Leech
+POSITION: oops.SOLID.singleResponsibilityPrinciple.before.FullTimeEmployee
+EMAIL: [email protected]
+MONTHLY WAGE: 920

Magda_Iovan.rec

@@ -0,0 +1,5 @@
+### EMPLOYEE RECORD ####
+NAME: Magda Iovan
+POSITION: oops.SOLID.singleResponsibilityPrinciple.before.PartTimeEmployee
+EMAIL: [email protected]
+MONTHLY WAGE: 920

Steve_Jones.rec

@@ -0,0 +1,5 @@
+### EMPLOYEE RECORD ####
+NAME: Steve Jones
+POSITION: oops.SOLID.singleResponsibilityPrinciple.before.PartTimeEmployee
+EMAIL: [email protected]
+MONTHLY WAGE: 800

bin/.gitignore

@@ -0,0 +1 @@
+/oops/

src/oops/SOLID/lsp/stack/before/StackBehavior.java

@@ -0,0 +1,11 @@
+package oops.SOLID.lsp.stack.before;
+
+public interface StackBehavior<T> {
+
+	public void push(T a);
+
+	public void pop();
+
+	public T top();
+
+}

src/oops/SOLID/lsp/stack/before/StackWrong.java

@@ -1,6 +1,8 @@
 package oops.SOLID.lsp.stack.before;
 
 import java.util.ArrayList;
+import java.util.EmptyStackException;
+import java.util.List;
 /*
  * Stack is-a list with push() pop() methods.
  * So can we create a stack by extending an ArrayList class?
@@ -14,29 +16,42 @@
  * so objects of ArrayList are not fully replaceable by the objects of stack.   
  * 
  */
-public class StackWrong extends ArrayList<Integer>{
+public class StackWrong<T> implements StackBehavior<T> {
 	private int topPointer = 0;
 
-	public void push(Integer a) {
-		add(topPointer, a);
+	private List<T> stack;
+
+	public StackWrong() {
+		stack = new ArrayList<T>();
+	}
+
+	public void push(T a) {
+		stack.add(topPointer, a);
 		topPointer++;
 	}	
 	public void pop() {
-		remove(topPointer-1);
+		if(topPointer == 0) {
+			throw new EmptyStackException();
+		}
+		stack.remove(topPointer-1);
 		topPointer--;
 	}
-	public Integer top() {
-		return get(topPointer-1);
+
+	public T top() {
+		if(topPointer == 0) {
+			throw new EmptyStackException();
+		}
+		return stack.get(topPointer-1);
 	}
 
 	public static void main(String[] args) {
-		StackWrong st = new StackWrong();
+		StackWrong<Integer> st = new StackWrong<>();
 		st.push(1);
 		st.push(2);
 		System.out.println(st.top());
 		st.pop();
 		System.out.println(st.top());
-		st.clear();
+//		st.clear(); // not supported 
 		System.out.println(st.top());
 	}
 }

src/oops/SOLID/openClosePrinciple/before/client/CalculateTaxesClient.java

@@ -27,9 +27,11 @@ public static void main(String[] args) {
 
             // compute individual tax
             double tax = TaxCalculator.calculate(employee);
-            String formattedTax = currencyFormatter.format(tax);
-            // add to company total taxes
-            totalTaxes += TaxCalculator.calculate(employee);
+            totalTaxes += tax;
         }
+        String formattedTax = currencyFormatter.format(totalTaxes);
+
+
+        System.out.println("totalTaxes : \t" + formattedTax);
     }
 }

src/oops/SOLID/openClosePrinciple/before/employees/EducationalTax.java

@@ -0,0 +1,6 @@
+package oops.SOLID.openClosePrinciple.before.employees;
+
+public interface EducationalTax {
+
+	int getEducationalTax();
+}

src/oops/SOLID/openClosePrinciple/before/employees/Employee.java

@@ -8,6 +8,8 @@ public abstract class Employee {
     private String lastName;
     private int monthlyIncome;
     private int nbHoursPerWeek;
+
+    public abstract double calculate();
 
     public Employee(String fullName, int monthlyIncome){
         setMonthlyIncome(monthlyIncome);
@@ -57,5 +59,6 @@ public void setNbHoursPerWeek(int nbHoursPerWeek) {
     public String getFullName(){
         return this.firstName + " " + this.lastName;
     }
+
 }
 

src/oops/SOLID/openClosePrinciple/before/employees/FullTimeEmployee.java

@@ -1,8 +1,34 @@
 package oops.SOLID.openClosePrinciple.before.employees;
 
-public class FullTimeEmployee extends Employee {
-    public FullTimeEmployee(String fullName, int monthlyIncome) {
+public class FullTimeEmployee extends Employee implements IncomeTax , ProfessionalTax,EducationalTax {
+
+	private final static int INCOME_TAX_PERCENTAGE = 30;
+	private final static int EDUCATIONAL_TAX_PERCENTAGE = 1;
+	private final static int PROFESSIONAL_TAX_PERCENTAGE = 2;
+
+	public FullTimeEmployee(String fullName, int monthlyIncome) {
         super(fullName, monthlyIncome);
         this.setNbHoursPerWeek(40);
     }
+
+	@Override
+	public double calculate() {
+		return (this.getMonthlyIncome() * getIncomeTax()) / 100 + (this.getMonthlyIncome() * getProfessionalTax()) / 100
+				+ (this.getMonthlyIncome() * getEducationalTax()) / 100;
+	}
+
+	@Override
+	public int getEducationalTax() {
+		return EDUCATIONAL_TAX_PERCENTAGE;
+	}
+
+	@Override
+	public int getProfessionalTax() {
+		return PROFESSIONAL_TAX_PERCENTAGE;
+	}
+
+	@Override
+	public int getIncomeTax() {
+		return INCOME_TAX_PERCENTAGE;
+	}
 }

src/oops/SOLID/openClosePrinciple/before/employees/IncomeTax.java

@@ -0,0 +1,6 @@
+package oops.SOLID.openClosePrinciple.before.employees;
+
+public interface IncomeTax {
+
+	int getIncomeTax();
+}

src/oops/SOLID/openClosePrinciple/before/employees/Intern.java

@@ -1,8 +1,27 @@
 package oops.SOLID.openClosePrinciple.before.employees;
 
-public class Intern extends Employee {
-    public Intern(String fullName, int monthlyIncome, int nbHours) {
+public class Intern extends Employee implements IncomeTax{
+
+	private final static int INCOME_TAX_PERCENTAGE = 15;
+
+	public Intern(String fullName, int monthlyIncome, int nbHours) {
         super(fullName, monthlyIncome);
         setNbHoursPerWeek(nbHours);
     }
+
+	@Override
+	public double calculate() {
+		Double tax = 0.0;
+
+		if ((this.getMonthlyIncome() * 12) > 30000) {
+			tax = (getIncomeTax() * getIncomeTax()) / 100.0;
+		}
+		return tax;
+	}
+
+
+	@Override
+	public int getIncomeTax() {
+		return INCOME_TAX_PERCENTAGE;
+	}
 }

src/oops/SOLID/openClosePrinciple/before/employees/PartTimeEmployee.java

@@ -1,8 +1,36 @@
 package oops.SOLID.openClosePrinciple.before.employees;
 
-public class PartTimeEmployee extends Employee {
-    public PartTimeEmployee(String fullName, int monthlyIncome) {
+public class PartTimeEmployee extends Employee implements IncomeTax , ProfessionalTax,EducationalTax{
+
+	private final static int INCOME_TAX_PERCENTAGE = 20;
+	private final static int EDUCATIONAL_TAX_PERCENTAGE = 1;
+	private final static int PROFESSIONAL_TAX_PERCENTAGE = 3;
+
+	public PartTimeEmployee(String fullName, int monthlyIncome) {
         super(fullName, monthlyIncome);
         this.setNbHoursPerWeek(20);
     }
+
+	@Override
+	public
+	double calculate() {
+		return (this.getMonthlyIncome() * getIncomeTax()) / 100 + (this.getMonthlyIncome() * getProfessionalTax()) / 100
+				+ (this.getMonthlyIncome() * getEducationalTax()) / 100;
+	}
+
+
+	@Override
+	public int getEducationalTax() {
+		return EDUCATIONAL_TAX_PERCENTAGE;
+	}
+
+	@Override
+	public int getProfessionalTax() {
+		return PROFESSIONAL_TAX_PERCENTAGE;
+	}
+
+	@Override
+	public int getIncomeTax() {
+		return INCOME_TAX_PERCENTAGE;
+	}
 }

src/oops/SOLID/openClosePrinciple/before/employees/ProfessionalTax.java

@@ -0,0 +1,7 @@
+package oops.SOLID.openClosePrinciple.before.employees;
+
+public interface ProfessionalTax {
+
+	int getProfessionalTax();
+
+}

src/oops/SOLID/openClosePrinciple/before/persistence/EmployeeRepository.java

@@ -1,23 +1,40 @@
 package oops.SOLID.openClosePrinciple.before.persistence;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
 import oops.SOLID.openClosePrinciple.before.employees.Employee;
 import oops.SOLID.openClosePrinciple.before.employees.FullTimeEmployee;
+import oops.SOLID.openClosePrinciple.before.employees.Intern;
 import oops.SOLID.openClosePrinciple.before.employees.PartTimeEmployee;
 
 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);
+    List<Employee> employees = new ArrayList<Employee>();
+    private final static int NB_HOURS_PER_WEEK= 10;
+
+	public EmployeeRepository(){
+
+		  // 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);
+       Employee steve = new PartTimeEmployee("Steve Jones", 800);
+       Employee magda = new PartTimeEmployee("Magda Iovan", 920);
+
+       Employee intern1 = new Intern("ravi kumar", 800,NB_HOURS_PER_WEEK);
+       Employee intern2 = new Intern("syam kumar", 920,NB_HOURS_PER_WEEK);
+
+       addEmployee(anna, billy, steve, magda,intern1,intern2);
+	}
+
+	public  void addEmployee(Employee... employees) {
+			this.employees.addAll(Arrays.asList(employees));
+	}
 
-        return Arrays.asList(anna, billy, steve, magda);
+
+    public List<Employee> findAll(){
+        return employees;
     }
 }

src/oops/SOLID/openClosePrinciple/before/taxes/TaxCalculator.java

@@ -3,14 +3,9 @@
 import oops.SOLID.openClosePrinciple.before.employees.Employee;
 
 public class TaxCalculator {
-    private final static int INCOME_TAX_PERCENTAGE = 20;
-    private final static int PROFESSIONAL_TAX_PERCENTAGE = 3;
-
 
     public static double calculate(Employee employee) {
-        return 
-                (employee.getMonthlyIncome() * PROFESSIONAL_TAX_PERCENTAGE) / 100 +
-                (employee.getMonthlyIncome() * INCOME_TAX_PERCENTAGE) / 100;
-
+    	return employee.calculate();
     }
+
 }

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

@@ -1,10 +1,5 @@
 package oops.SOLID.singleResponsibilityPrinciple.before;
 
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-
 /*
 Models an employee form a business perspective
  */
@@ -62,33 +57,26 @@ public void setNbHoursPerWeek(int nbHoursPerWeek) {
     public String getFullName(){
         return this.firstName + " " + this.lastName;
     }
-
-    public  void save(){
-        try {
-        	Employee employee =this;
-            StringBuilder sb = new StringBuilder();
-            sb.append("### EMPLOYEE RECORD ####");
-            sb.append(System.lineSeparator());
-            sb.append("NAME: ");
-            sb.append(employee.firstName + " " + employee.lastName);
-            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.monthlyIncome);
-            sb.append(System.lineSeparator());
-
-            Path path = Paths.get(employee.getFullName()
-                    .replace(" ","_") + ".rec");
-            Files.write(path, sb.toString().getBytes());
-
-            System.out.println("Saved employee " + employee.toString());
-        } catch (IOException e){
-            System.out.println("ERROR: Could not save employee. " + e);
-        }
-    }
+
+
+  	public String employeeFormat() {
+      	 StringBuilder sb = new StringBuilder();
+           sb.append("### EMPLOYEE RECORD ####");
+           sb.append(System.lineSeparator());
+           sb.append("NAME: ");
+           sb.append(this.getFullName());
+           sb.append(System.lineSeparator());
+           sb.append("POSITION: ");
+           sb.append(this.getClass().getTypeName());
+           sb.append(System.lineSeparator());
+           sb.append("EMAIL: ");
+           sb.append(this.getEmail());
+           sb.append(System.lineSeparator());
+           sb.append("MONTHLY WAGE: ");
+           sb.append(this.getMonthlyIncome());
+           sb.append(System.lineSeparator());
+           return sb.toString();
+  	}
+
+
 }