Merge remote-tracking branch 'upstream/master'

algorithms/src/main/java/com/baeldung/algorithms/prime/PrimeGenerator.java

@@ -0,0 +1,59 @@
+package com.baeldung.algorithms.prime;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public class PrimeGenerator {
+    public static List<Integer> sieveOfEratosthenes(int n) {
+        final boolean prime[] = new boolean[n + 1];
+        Arrays.fill(prime, true);
+
+        for (int p = 2; p * p <= n; p++) {
+            if (prime[p]) {
+                for (int i = p * 2; i <= n; i += p)
+                    prime[i] = false;
+            }
+        }
+
+        final List<Integer> primes = new LinkedList<>();
+        for (int i = 2; i <= n; i++) {
+            if (prime[i])
+                primes.add(i);
+        }
+        return primes;
+    }
+
+    public static List<Integer> primeNumbersBruteForce(int max) {
+        final List<Integer> primeNumbers = new LinkedList<Integer>();
+        for (int i = 2; i <= max; i++) {
+            if (isPrimeBruteForce(i)) {
+                primeNumbers.add(i);
+            }
+        }
+        return primeNumbers;
+    }
+
+    private static boolean isPrimeBruteForce(int x) {
+        for (int i = 2; i < x; i++) {
+            if (x % i == 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static List<Integer> primeNumbersTill(int max) {
+        return IntStream.rangeClosed(2, max)
+            .filter(x -> isPrime(x))
+            .boxed()
+            .collect(Collectors.toList());
+    }
+
+    private static boolean isPrime(int x) {
+        return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
+            .allMatch(n -> x % n != 0);
+    }
+}

algorithms/src/test/java/com/baeldung/algorithms/prime/PrimeGeneratorTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.algorithms.prime;
+
+import static com.baeldung.algorithms.prime.PrimeGenerator.*;
+
+import java.util.Arrays;
+import java.util.List;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class PrimeGeneratorTest {
+    @Test
+    public void whenBruteForced_returnsSuccessfully() {
+        final List<Integer> primeNumbers = primeNumbersBruteForce(20);
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+    }
+
+    @Test
+    public void whenOptimized_returnsSuccessfully() {
+        final List<Integer> primeNumbers = primeNumbersTill(20);
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+    }
+
+    @Test
+    public void whenSieveOfEratosthenes_returnsSuccessfully() {
+        final List<Integer> primeNumbers = sieveOfEratosthenes(20);
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+    }
+}

core-java-8/src/main/java/com/baeldung/prime/PrimeGenerator.java

@@ -0,0 +1,59 @@
+package com.baeldung.prime;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public class PrimeGenerator {
+    public static List<Integer> sieveOfEratosthenes(int n) {
+        final boolean prime[] = new boolean[n + 1];
+        Arrays.fill(prime, true);
+
+        for (int p = 2; p * p <= n; p++) {
+            if (prime[p]) {
+                for (int i = p * 2; i <= n; i += p)
+                    prime[i] = false;
+            }
+        }
+
+        final List<Integer> primes = new LinkedList<>();
+        for (int i = 2; i <= n; i++) {
+            if (prime[i])
+                primes.add(i);
+        }
+        return primes;
+    }
+
+    public static List<Integer> primeNumbersBruteForce(int max) {
+        final List<Integer> primeNumbers = new LinkedList<Integer>();
+        for (int i = 2; i <= max; i++) {
+            if (isPrimeBruteForce(i)) {
+                primeNumbers.add(i);
+            }
+        }
+        return primeNumbers;
+    }
+
+    private static boolean isPrimeBruteForce(int x) {
+        for (int i = 2; i < x; i++) {
+            if (x % i == 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static List<Integer> primeNumbersTill(int max) {
+        return IntStream.rangeClosed(2, max)
+            .filter(x -> isPrime(x))
+            .boxed()
+            .collect(Collectors.toList());
+    }
+
+    private static boolean isPrime(int x) {
+        return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
+            .allMatch(n -> x % n != 0);
+    }
+}

core-java-8/src/test/java/com/baeldung/prime/PrimeGeneratorTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.prime;
+
+import static com.baeldung.prime.PrimeGenerator.*;
+
+import java.util.Arrays;
+import java.util.List;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class PrimeGeneratorTest {
+    @Test
+    public void whenBruteForced_returnsSuccessfully() {
+        final List<Integer> primeNumbers = primeNumbersBruteForce(20);
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+    }
+
+    @Test
+    public void whenOptimized_returnsSuccessfully() {
+        final List<Integer> primeNumbers = primeNumbersTill(20);
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+    }
+
+    @Test
+    public void whenSieveOfEratosthenes_returnsSuccessfully() {
+        final List<Integer> primeNumbers = sieveOfEratosthenes(20);
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+    }
+}

core-java/src/test/java/com/baeldung/stack/StackUnitTest.java

@@ -0,0 +1,137 @@
+package com.baeldung.stack;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.*;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Stack;
+
+import org.junit.Test;
+public class StackUnitTest {
+
+    @Test
+    public void whenStackIsCreated_thenItHasSize0() {
+        Stack intStack = new Stack();
+        assertEquals(0, intStack.size());
+    }
+
+    @Test
+    public void givenEmptyStack_whenElementIsPushed_thenStackSizeisIncreased() {
+        Stack intStack = new Stack();
+        intStack.push(1);
+        assertEquals(1, intStack.size());
+    }
+
+    @Test
+    public void givenEmptyStack_whenMultipleElementsArePushed_thenStackSizeisIncreased() {
+        Stack intStack = new Stack();
+        List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
+        boolean result = intStack.addAll(intList);
+        assertTrue(result);
+        assertEquals(7, intList.size());
+    }
+
+    @Test
+    public void whenElementIsPoppedFromStack_thenElementIsRemovedAndSizeChanges() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        intStack.pop();
+        assertTrue(intStack.isEmpty());
+    }
+
+    @Test
+    public void whenElementIsPeeked_thenElementIsNotRemovedAndSizeDoesNotChange() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        intStack.peek();
+        assertEquals(1, intStack.search(5));
+        assertEquals(1, intStack.size());
+    }
+
+    @Test
+    public void whenElementIsOnStack_thenSearchReturnsItsDistanceFromTheTop() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        assertEquals(1, intStack.search(5));
+    }
+
+    @Test
+    public void whenElementIsOnStack_thenIndexOfReturnsItsIndex() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        int indexOf = intStack.indexOf(5);
+        assertEquals(0, indexOf);
+    }
+
+    @Test
+    public void whenMultipleElementsAreOnStack_thenIndexOfReturnsLastElementIndex() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        intStack.push(5);
+        intStack.push(5);
+        int lastIndexOf = intStack.lastIndexOf(5);
+        assertEquals(2, lastIndexOf);
+    }
+
+    @Test
+    public void givenElementOnStack_whenRemoveElementIsInvoked_thenElementIsRemoved() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        intStack.push(5);
+        intStack.removeElement(5);
+        assertEquals(1, intStack.size());
+    }
+
+    @Test
+    public void givenElementOnStack_whenRemoveElementAtIsInvoked_thenElementIsRemoved() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        intStack.push(7);
+        intStack.removeElementAt(1);
+        assertEquals(-1, intStack.search(7));
+    }
+
+    @Test
+    public void givenElementsOnStack_whenRemoveAllElementsIsInvoked_thenAllElementsAreRemoved() {
+        Stack<Integer> intStack = new Stack();
+        intStack.push(5);
+        intStack.push(7);
+        intStack.removeAllElements();
+        assertTrue(intStack.isEmpty());
+    }
+
+    @Test
+    public void givenElementsOnStack_whenRemoveAllIsInvoked_thenAllElementsFromCollectionAreRemoved() {
+        Stack<Integer> intStack = new Stack();
+        List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
+        intStack.addAll(intList);
+        intStack.add(500);
+        intStack.removeAll(intList);
+        assertEquals(1, intStack.size());
+    }
+
+    @Test
+    public void givenElementsOnStack_whenRemoveIfIsInvoked_thenAllElementsSatysfyingConditionAreRemoved() {
+        Stack<Integer> intStack = new Stack();
+        List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
+        intStack.addAll(intList);
+        intStack.removeIf(element -> element < 6);
+        assertEquals(2, intStack.size());
+    }
+
+    @Test
+    public void whenAnotherStackCreatedWhileTraversingStack_thenStacksAreEqual() {
+        Stack<Integer> intStack = new Stack<>();
+        List<Integer> intList = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
+        intStack.addAll(intList);
+        ListIterator<Integer> it = intStack.listIterator();
+        Stack<Integer> result = new Stack();
+        while(it.hasNext()) {
+            result.push(it.next());
+        }
+
+        assertThat(result, equalTo(intStack));
+    }
+}

core-java/src/test/java/com/baeldung/stringpool/StringPoolUnitTest.java

@@ -0,0 +1,43 @@
+package com.baeldung.stringpool;
+
+import org.junit.Test;
+import static org.assertj.core.api.Assertions.*;
+
+public class StringPoolUnitTest {
+
+    @Test
+    public void whenCreatingConstantStrings_thenTheirAddressesAreEqual() {
+        String constantString1 = "Baeldung";
+        String constantString2 = "Baeldung";
+
+        assertThat(constantString1).isSameAs(constantString2);
+    }
+
+    @Test
+    public void whenCreatingStringsWithTheNewOperator_thenTheirAddressesAreDifferent() {
+        String newString1 = new String("Baeldung");
+        String newString2 = new String("Baeldung");
+
+        assertThat(newString1).isNotSameAs(newString2);
+    }
+
+    @Test
+    public void whenComparingConstantAndNewStrings_thenTheirAddressesAreDifferent() {
+        String constantString = "Baeldung";
+        String newString = new String("Baeldung");
+
+        assertThat(constantString).isNotSameAs(newString);
+    }
+
+    @Test
+    public void whenInterningAStringWithIdenticalValueToAnother_thenTheirAddressesAreEqual() {
+        String constantString = "interned Baeldung";
+        String newString = new String("interned Baeldung");
+
+        assertThat(constantString).isNotSameAs(newString);
+
+        String internedString = newString.intern();
+
+        assertThat(constantString).isSameAs(internedString);
+    }
+}

drools/backward-chaining/pom.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <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/xsd/maven-4.0.0.xsd">
-
 	<modelVersion>4.0.0</modelVersion>
 
 	<artifactId>drools-backward-chaining</artifactId>
@@ -17,7 +16,6 @@
 	<properties>
 		<runtime.version>6.4.0.Final</runtime.version>
 	</properties>
-
 	<dependencies>
 		<dependency>
 			<groupId>org.kie</groupId>
@@ -26,7 +24,6 @@
 		</dependency>
 		<dependency>
 			<groupId>org.drools</groupId>
-			<artifactId>drools-core</artifactId>
 			<version>${runtime.version}</version>
 		</dependency>
 		<dependency>
@@ -35,4 +32,4 @@
 			<version>${runtime.version}</version>
 		</dependency>
 	</dependencies>
-</project>
+</project>

drools/backward-chaining/src/main/java/com/baeldung/drools/BackwardChaining.java

@@ -21,13 +21,11 @@ public class BackwardChaining {
         KieSession ksession = kContainer.newKieSession("ksession-backward-chaining");
         ksession.setGlobal("result", result);
         ksession.insert(new Fact("Asia", "Planet Earth"));
-//        ksession.insert(new Fact("China", "Asia"));
+        // ksession.insert(new Fact("China", "Asia"));
         ksession.insert(new Fact("Great Wall of China", "China"));
 
         ksession.fireAllRules();
 
         return result;
-
     }
-
 }

drools/backward-chaining/src/main/resources/com/baeldung/drools/backward_chaining/rules.drl

@@ -0,0 +1,27 @@
+package com.baeldung
+
+import com.baeldung.drools.model.Fact;
+
+global com.baeldung.drools.model.Result result;
+
+dialect  "mvel"
+
+query belongsTo(String x, String y)
+  Fact(x, y;)
+  or
+  (Fact(z, y;) and belongsTo(x, z;))
+end
+
+rule "Great Wall of China BELONGS TO Planet Earth"
+when
+    belongsTo("Great Wall of China", "Planet Earth";)
+then
+	result.setValue("Decision one taken: Great Wall of China BELONGS TO Planet Earth");
+end
+
+rule "print all facts"
+when
+    belongsTo(element, place;)
+then
+    result.addFact(element + " IS ELEMENT OF " + place);
+end

drools/backward-chaining/src/test/java/com/baeldung/test/BackwardChainingTest.java

@@ -2,8 +2,6 @@ package com.baeldung.test;
 
 import org.junit.Before;
 import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.JUnit4;
 import org.kie.api.KieServices;
 import org.kie.api.runtime.KieContainer;
 import org.kie.api.runtime.KieSession;
@@ -13,7 +11,6 @@ import com.baeldung.drools.model.Result;
 
 import static junit.framework.TestCase.assertEquals;
 
-@RunWith(value = JUnit4.class)
 public class BackwardChainingTest {
     private Result result;
     private KieServices ks;

drools/pom.xml

@@ -7,6 +7,8 @@
     <groupId>com.baeldung</groupId>
     <artifactId>drools</artifactId>
     <version>1.0.0-SNAPSHOT</version>
+	
+	<packaging>pom</packaging>
 
     <parent>
         <groupId>com.baeldung</groupId>

guest/spring-security/README.md

@@ -0,0 +1,17 @@
+## Building
+
+To build the module, use Maven's `package` goal:
+
+```
+mvn clean package
+```
+
+## Running
+
+To run the application, use Spring Boot's `run` goal:
+
+```
+mvn spring-boot:run
+```
+
+The application will be accessible at [http://localhost:8080/](http://localhost:8080/)

guest/spring-security/pom.xml

@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.stackify.guest</groupId>
+    <artifactId>spring-security</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.0.M6</version>
+        <relativePath/>
+    </parent>
+
+    <name>spring-security</name>
+    <description>Spring Security Sample Project</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.thymeleaf</groupId>
+            <artifactId>thymeleaf-spring5</artifactId>
+            <version>3.0.8.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <repositories>
+        <repository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+    <pluginRepositories>
+        <pluginRepository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </pluginRepository>
+    </pluginRepositories>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+</project>

guest/spring-security/src/main/java/com/stackify/guest/springsecurity/Application.java

@@ -0,0 +1,15 @@
+package com.stackify.guest.springsecurity;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@ComponentScan(basePackages = {"com.stackify.guest.springsecurity"})
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+}

guest/spring-security/src/main/java/com/stackify/guest/springsecurity/config/WebMvcConfiguration.java

@@ -0,0 +1,16 @@
+package com.stackify.guest.springsecurity.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebMvcConfiguration implements WebMvcConfigurer {
+
+    @Override
+    public void addViewControllers(ViewControllerRegistry registry) {
+        registry.addViewController("/customLogin").setViewName("customLogin");
+        registry.addViewController("/loginSuccess").setViewName("index");
+    }
+
+}

guest/spring-security/src/main/java/com/stackify/guest/springsecurity/config/WebSecurityConfig.java

@@ -0,0 +1,40 @@
+package com.stackify.guest.springsecurity.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.provisioning.JdbcUserDetailsManager;
+
+import javax.sql.DataSource;
+
+@EnableWebSecurity
+public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
+
+    @Bean
+    public UserDetailsService jdbcUserDetailsService(DataSource dataSource) {
+        JdbcUserDetailsManager manager = new JdbcUserDetailsManager();
+        manager.setDataSource(dataSource);
+        return manager;
+    }
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http.authorizeRequests()
+                .antMatchers("/css/**").permitAll()
+                .anyRequest().authenticated()
+                .and().formLogin()
+                .loginPage("/customLogin")
+                .defaultSuccessUrl("/loginSuccess", true)
+                .permitAll();
+    }
+
+}

guest/spring-security/src/main/resources/data.sql

@@ -0,0 +1,2 @@
+INSERT INTO users VALUES ('jill', '$2a$04$qUlqAEEYF1YvrpJMosodoewgL6aO.qgHytl2k5L7kdXEWnJsFdxvq', TRUE);
+INSERT INTO authorities VALUES ('jill', 'USERS');

guest/spring-security/src/main/resources/schema.sql

@@ -0,0 +1,10 @@
+CREATE TABLE users (
+  username VARCHAR(256) PRIMARY KEY,
+  password VARCHAR(256),
+  enabled  BOOLEAN
+);
+
+CREATE TABLE authorities (
+  username  VARCHAR(256) REFERENCES users (username),
+  authority VARCHAR(256)
+);

guest/spring-security/src/main/resources/static/css/styles.css

@@ -0,0 +1,3 @@
+.bad-login {
+  color: red;
+}

guest/spring-security/src/main/resources/templates/customLogin.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:th="http://www.thymeleaf.org">
+<head>
+    <link rel="stylesheet" href="/css/styles.css">
+</head>
+<body>
+<form th:action="@{/customLogin}" method="post">
+    <fieldset>
+        <label for="username">Login:</label>
+        <input id="username" name="username">
+        <label for="password">Password:</label>
+        <input id="password" name="password" type="password">
+    </fieldset>
+    <input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}"/>
+    <input type="submit" value="Login">
+    <div th:if="${param.error}" class="bad-login">Bad login or password.</div>
+    <div th:if="${param.logout}">Log out successful.</div>
+</form>
+</body>
+</html>

guest/spring-security/src/main/resources/templates/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:th="http://www.thymeleaf.org">
+<p>Hello, <span th:text="${
+    T(org.springframework.security.core.context.SecurityContextHolder)
+      .context.authentication.principal.username}"></span>!</p>
+<form action="/logout" method="post">
+    <input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}"/>
+    <input type="submit" value="Log Out">
+</form>
+</html>

hibernate5/src/main/java/com/baeldung/hibernate/HibernateUtil.java

@@ -2,8 +2,17 @@ package com.baeldung.hibernate;
 
 import com.baeldung.hibernate.pojo.Employee;
 import com.baeldung.hibernate.pojo.EntityDescription;
+import com.baeldung.hibernate.pojo.OrderEntry;
+import com.baeldung.hibernate.pojo.OrderEntryIdClass;
+import com.baeldung.hibernate.pojo.OrderEntryPK;
+import com.baeldung.hibernate.pojo.Product;
 import com.baeldung.hibernate.pojo.Phone;
 import com.baeldung.hibernate.pojo.TemporalValues;
+import com.baeldung.hibernate.pojo.Course;
+import com.baeldung.hibernate.pojo.Student;
+import com.baeldung.hibernate.pojo.User;
+import com.baeldung.hibernate.pojo.UserProfile;
+
 import org.hibernate.SessionFactory;
 import org.hibernate.boot.Metadata;
 import org.hibernate.boot.MetadataSources;
@@ -33,6 +42,14 @@ public class HibernateUtil {
         metadataSources.addAnnotatedClass(Phone.class);
         metadataSources.addAnnotatedClass(EntityDescription.class);
         metadataSources.addAnnotatedClass(TemporalValues.class);
+        metadataSources.addAnnotatedClass(User.class);
+        metadataSources.addAnnotatedClass(Student.class);
+        metadataSources.addAnnotatedClass(Course.class);
+        metadataSources.addAnnotatedClass(Product.class);
+        metadataSources.addAnnotatedClass(OrderEntryPK.class);
+        metadataSources.addAnnotatedClass(OrderEntry.class);
+        metadataSources.addAnnotatedClass(OrderEntryIdClass.class);
+        metadataSources.addAnnotatedClass(UserProfile.class);
 
         Metadata metadata = metadataSources.buildMetadata();
         return metadata.getSessionFactoryBuilder()

hibernate5/src/main/java/com/baeldung/hibernate/pojo/Course.java

@@ -0,0 +1,27 @@
+package com.baeldung.hibernate.pojo;
+
+import java.util.UUID;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+public class Course {
+
+    @Id
+    @GeneratedValue
+    private UUID courseId;
+
+    public UUID getCourseId() {
+        return courseId;
+    }
+
+    public void setCourseId(UUID courseId) {
+        this.courseId = courseId;
+    }
+    
+    
+
+   
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/Department.java

@@ -0,0 +1,25 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.TableGenerator;
+
+@Entity
+public class Department {
+    @Id
+    @GeneratedValue(strategy = GenerationType.TABLE, generator="table-generator")
+    @TableGenerator (name="table-generator", table="dep_ids", pkColumnName="seq_id", valueColumnName="seq_value")
+    private long depId;
+
+    public long getDepId() {
+        return depId;
+    }
+
+    public void setDepId(long depId) {
+        this.depId = depId;
+    }
+    
+    
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntry.java

@@ -0,0 +1,20 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.EmbeddedId;
+import javax.persistence.Entity;
+
+@Entity
+public class OrderEntry {
+
+    @EmbeddedId
+    private OrderEntryPK entryId;
+
+    public OrderEntryPK getEntryId() {
+        return entryId;
+    }
+
+    public void setEntryId(OrderEntryPK entryId) {
+        this.entryId = entryId;
+    }
+
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntryIdClass.java

@@ -0,0 +1,31 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.IdClass;
+
+@Entity
+@IdClass(OrderEntryPK.class)
+public class OrderEntryIdClass {
+    @Id
+    private long orderId;
+    @Id
+    private long productId;
+
+    public long getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(long orderId) {
+        this.orderId = orderId;
+    }
+
+    public long getProductId() {
+        return productId;
+    }
+
+    public void setProductId(long productId) {
+        this.productId = productId;
+    }
+
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/OrderEntryPK.java

@@ -0,0 +1,46 @@
+package com.baeldung.hibernate.pojo;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class OrderEntryPK implements Serializable {
+
+    private long orderId;
+    private long productId;
+
+    public long getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(long orderId) {
+        this.orderId = orderId;
+    }
+
+    public long getProductId() {
+        return productId;
+    }
+
+    public void setProductId(long productId) {
+        this.productId = productId;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        OrderEntryPK pk = (OrderEntryPK) o;
+        return Objects.equals(orderId, pk.orderId) && Objects.equals(productId, pk.productId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(orderId, productId);
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/Product.java

@@ -0,0 +1,26 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+import org.hibernate.annotations.GenericGenerator;
+import org.hibernate.annotations.Parameter;
+
+@Entity
+public class Product {
+
+    @Id
+    @GeneratedValue(generator = "prod-generator")
+    @GenericGenerator(name = "prod-generator", parameters = @Parameter(name = "prefix", value = "prod"), strategy = "com.baeldung.hibernate.pojo.generator.MyGenerator")
+    private String prodId;
+
+    public String getProdId() {
+        return prodId;
+    }
+
+    public void setProdId(String prodId) {
+        this.prodId = prodId;
+    }
+
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/Student.java

@@ -0,0 +1,23 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Student {
+
+    @Id
+    @GeneratedValue (strategy = GenerationType.SEQUENCE)
+    private long studentId;
+
+    public long getStudentId() {
+        return studentId;
+    }
+
+    public void setStudent_id(long studentId) {
+        this.studentId = studentId;
+    }
+    
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/User.java

@@ -0,0 +1,24 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.SequenceGenerator;
+
+@Entity
+public class User {
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence-generator")
+    @SequenceGenerator(name = "sequence-generator", sequenceName = "user_sequence", initialValue = 4)
+    private long userId;
+
+    public long getUserId() {
+        return userId;
+    }
+
+    public void setUserId(long userId) {
+        this.userId = userId;
+    }
+
+}