Programming 3 Question 2

.gitignore

@@ -0,0 +1,39 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+.kotlin
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/copilot.data.migration.ask2agent.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Ask2AgentMigrationStateService">
+    <option name="migrationStatus" value="COMPLETED" />
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

pom.xml

@@ -0,0 +1,9 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.example</groupId>
+  <artifactId>Prog3-AssignmentQ2</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <name>Archetype - Prog3-AssignmentQ2</name>
+  <url>http://maven.apache.org</url>
+</project>

src/main/resources/META-INF/maven/archetype.xml

@@ -0,0 +1,9 @@
+<archetype>
+  <id>Prog3-AssignmentQ2</id>
+  <sources>
+    <source>src/main/java/App.java</source>
+  </sources>
+  <testSources>
+    <source>src/test/java/AppTest.java</source>
+  </testSources>
+</archetype>

src/main/resources/archetype-resources/pom.xml

@@ -0,0 +1,15 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>$org.example</groupId>
+  <artifactId>$Prog3-AssignmentQ2</artifactId>
+  <version>$1.0-SNAPSHOT</version>
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>

src/main/resources/archetype-resources/src/main/java/App.java

@@ -0,0 +1,55 @@
+package $org.example;
+
+/**
+ * Taxables Question for Programming 3
+ *
+ */
+import java.util.*;
+import java.util.stream.*;
+
+public class App {
+
+    public static void main(String[] args) {
+
+        TaxCalculator taxCalculator = (income) -> {
+            if (income <= 12_570) {
+                return 0;
+            } else if (income <= 50_270) {
+                return (income - 12_570) * 0.20;
+            } else {
+                return (50_270 - 12_570) * 0.20
+                        + (income - 50_270) * 0.40;
+            }
+        };
+
+        // Create Employee objects
+        List<Employee> employees = new ArrayList<>();
+        employees.add(new Employee("u1", "pass123", "Alice", "London", 30_000));
+        employees.add(new Employee("u2", "password", "Bob", "Leeds", 55_000));
+        employees.add(new Employee("u3", "hello", "Charlie", "Manchester", 12_000));
+        employees.add(new Employee("u4", "secure1234", "Daisy", "Bristol", 80_000));
+
+        // Apply tax calculation to all employees (Lambda + Stream)
+        employees.forEach(e ->
+                e.setTaxToPay(taxCalculator.calculate(e.getIncome()))
+        );
+
+        // Sort employees by income (ascending)
+        List<Employee> sortedByIncome = employees.stream()
+                .sorted(Comparator.comparingDouble(Employee::getIncome))
+                .toList();
+
+        // Filter employees who pay tax (income above personal allowance)
+        List<Employee> taxableEmployees = employees.stream()
+                .filter(e -> e.getIncome() > 12_570)
+                .toList();
+
+        // Optional output to demonstrate integration
+        sortedByIncome.forEach(e ->
+                System.out.println(e.getName() +
+                        " | Income: £" + e.getIncome() +
+                        " | Tax: £" + e.getTaxToPay())
+        );
+    }
+}
+

src/main/resources/archetype-resources/src/main/java/Employee.java

@@ -0,0 +1,42 @@
+package $org.example;
+
+/**
+ * Employee class for Taxables Question
+ *
+ */
+
+public class Employee extends User {
+
+    private String name;
+    private String address;
+    private double income;
+    private double taxToPay;
+
+    public Employee(String username, String password,
+                    String name, String address, double income) {
+        super(username, password);
+        this.name = name;
+        this.address = address;
+        this.income = income;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public double getIncome() {
+        return income;
+    }
+
+    public double getTaxToPay() {
+        return taxToPay;
+    }
+
+    public void setTaxToPay(double taxToPay) {
+        this.taxToPay = taxToPay;
+    }
+}

src/main/resources/archetype-resources/src/main/java/PasswordService.java

@@ -0,0 +1,25 @@
+package $org.example;
+
+/**
+ * Password Service for Taxables Question
+ *
+ */
+
+import java.util.*;
+import java.util.stream.*;
+
+public class PasswordService {
+
+    private List<String> passwords = new ArrayList<>();
+
+    public void addPassword(String password) {
+        passwords.add(password);
+    }
+
+    public double getAveragePasswordLength() {
+        return passwords.stream()
+                .mapToInt(String::length)
+                .average()
+                .orElse(0);
+    }
+}

src/main/resources/archetype-resources/src/main/java/User.java

@@ -0,0 +1,24 @@
+package $org.example;
+
+/**
+ * User class for Taxables Question
+ *
+ */
+
+public class User {
+    protected String username;
+    protected String password;
+
+    public User(String username, String password) {
+        this.username = username;
+        this.password = password;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+}

src/main/resources/archetype-resources/src/test/java/AppTest.java

@@ -0,0 +1,38 @@
+package $org.example;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+    extends TestCase
+{
+    /**
+     * Create the test case
+     *
+     * @param testName name of the test case
+     */
+    public AppTest( String testName )
+    {
+        super( testName );
+    }
+
+    /**
+     * @return the suite of tests being tested
+     */
+    public static Test suite()
+    {
+        return new TestSuite( AppTest.class );
+    }
+
+    /**
+     * Rigourous Test :-)
+     */
+    public void testApp()
+    {
+        assertTrue( true );
+    }
+}

src/main/resources/archetype-resources/src/test/java/EmployeeTaxTest.java

@@ -0,0 +1,58 @@
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
+import java.util.*;
+
+public class EmployeeTaxTest {
+
+    TaxCalculator taxCalculator = (income) -> {
+        if (income <= 12_570) return 0;
+        else if (income <= 50_270)
+            return (income - 12_570) * 0.20;
+        else
+            return (50_270 - 12_570) * 0.20
+                    + (income - 50_270) * 0.40;
+    };
+
+    @Test
+    void testPersonalAllowanceBand() {
+        assertEquals(0, taxCalculator.calculate(10_000));
+    }
+
+    @Test
+    void testBasicRateBand() {
+        assertEquals(3_486, taxCalculator.calculate(30_000), 0.01);
+    }
+
+    @Test
+    void testHigherRateBand() {
+        assertEquals(19_432, taxCalculator.calculate(80_000), 0.01);
+    }
+
+    @Test
+    void testSortingByIncome() {
+        List<Employee> employees = List.of(
+                new Employee("u1", "p1", "A", "X", 40_000),
+                new Employee("u2", "p2", "B", "Y", 20_000)
+        );
+
+        List<Employee> sorted = employees.stream()
+                .sorted(Comparator.comparingDouble(Employee::getIncome))
+                .toList();
+
+        assertEquals(20_000, sorted.get(0).getIncome());
+    }
+
+    @Test
+    void testFilteringHighEarners() {
+        List<Employee> employees = List.of(
+                new Employee("u1", "p1", "A", "X", 60_000),
+                new Employee("u2", "p2", "B", "Y", 30_000)
+        );
+
+        List<Employee> result = employees.stream()
+                .filter(e -> e.getIncome() > 50_000)
+                .toList();
+
+        assertEquals(1, result.size());
+    }
+}

src/main/resources/archetype-resources/src/test/java/PasswordServiceTest.java

@@ -0,0 +1,15 @@
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
+
+public class PasswordServiceTest {
+
+    @Test
+    void testAveragePasswordLength() {
+        PasswordService service = new PasswordService();
+        service.addPassword("abc");       // 3
+        service.addPassword("password");  // 8
+        service.addPassword("hello");     // 5
+
+        assertEquals(5.33, service.getAveragePasswordLength(), 0.01);
+    }
+}