dependencies: iluwatar#2449 bump maven-checkstyle-plugin from 3.1.0 to 3.2.0 + resolve chec… (iluwatar#2464)

* iluwatar#2449 bump maven-checkstyle-plugin from 3.1.0 to 3.2.0 + resolve checkstyle issues

* remove FileSelectorJFrame.java to resolve checkstyle issue

* remove FileSelectorJFrame.java to resolve checkstyle issue

* remove FileSelectorJFrame.java to resolve checkstyle issue

* add refactored file with correct filename to resolve checkstyle issue

* add the test data

* change filenames from JFrame to Jframe for checkstyle

* fix code smell from  sonar report

* add new testcases to improve the test coverage

* remove code smell

Author: rahul-raj

abstract-document/src/test/java/com/iluwatar/abstractdocument/AbstractDocumentTest.java

@@ -25,7 +25,6 @@
 package com.iluwatar.abstractdocument;
 
 import org.junit.jupiter.api.Test;
-
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

abstract-document/src/test/java/com/iluwatar/abstractdocument/DomainTest.java

@@ -28,7 +28,6 @@
 import com.iluwatar.abstractdocument.domain.Part;
 import com.iluwatar.abstractdocument.domain.enums.Property;
 import org.junit.jupiter.api.Test;
-
 import java.util.List;
 import java.util.Map;
 

abstract-factory/src/main/java/com/iluwatar/abstractfactory/Kingdom.java

@@ -27,6 +27,9 @@
 import lombok.Getter;
 import lombok.Setter;
 
+/**
+ * Helper class to manufacture {@link KingdomFactory} beans. 
+ */
 @Getter
 @Setter
 public class Kingdom {

active-object/src/main/java/com/iluwatar/activeobject/ActiveCreature.java

@@ -26,7 +26,6 @@
 
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -77,8 +76,8 @@ protected ActiveCreature(String name) {
    */
   public void eat() throws InterruptedException {
     requests.put(() -> {
-      logger.info("{} is eating!",name());
-      logger.info("{} has finished eating!",name());
+      logger.info("{} is eating!", name());
+      logger.info("{} has finished eating!", name());
     });
   }
 
@@ -88,7 +87,7 @@ public void eat() throws InterruptedException {
    */
   public void roam() throws InterruptedException {
     requests.put(() ->
-        logger.info("{} has started to roam in the wastelands.",name())
+        logger.info("{} has started to roam in the wastelands.", name())
     );
   }
 

active-object/src/main/java/com/iluwatar/activeobject/App.java

@@ -26,7 +26,6 @@
 
 import java.util.ArrayList;
 import java.util.List;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -58,7 +57,7 @@ public static void main(String[] args) {
   public void run() {
     List<ActiveCreature> creatures = new ArrayList<>();
     try {
-      for (int i = 0;i < NUM_CREATURES;i++) {
+      for (int i = 0; i < NUM_CREATURES; i++) {
         creatures.add(new Orc(Orc.class.getSimpleName() + i));
         creatures.get(i).eat();
         creatures.get(i).roam();
@@ -68,7 +67,7 @@ public void run() {
       logger.error(e.getMessage());
       Thread.currentThread().interrupt();
     } finally {
-      for (int i = 0;i < NUM_CREATURES;i++) {
+      for (int i = 0; i < NUM_CREATURES; i++) {
         creatures.get(i).kill(0);
       }
     }

adapter/src/test/java/com/iluwatar/adapter/AdapterPatternTest.java

@@ -26,7 +26,6 @@
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
-
 import java.util.HashMap;
 import java.util.Map;
 

business-delegate/src/test/java/com/iluwatar/business/delegate/AppTest.java

@@ -25,7 +25,6 @@
 package com.iluwatar.business.delegate;
 
 import org.junit.jupiter.api.Test;
-
 import java.io.IOException;
 
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;

caching/src/main/java/com/iluwatar/caching/AppManager.java

@@ -25,9 +25,7 @@
 package com.iluwatar.caching;
 
 import com.iluwatar.caching.database.DbManager;
-
 import java.util.Optional;
-
 import lombok.extern.slf4j.Slf4j;
 
 /**

caching/src/main/java/com/iluwatar/caching/CacheStore.java

@@ -28,7 +28,6 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
-
 import lombok.extern.slf4j.Slf4j;
 
 /**

caching/src/main/java/com/iluwatar/caching/database/MongoDb.java

@@ -52,7 +52,7 @@ public class MongoDb implements DbManager {
   private MongoClient client;
   private MongoDatabase db;
 
-  void setDB(MongoDatabase db) {
+  void setDb(MongoDatabase db) {
     this.db = db;
   }
 

caching/src/main/java/com/iluwatar/caching/database/VirtualDb.java

@@ -25,7 +25,6 @@
 package com.iluwatar.caching.database;
 
 import com.iluwatar.caching.UserAccount;
-
 import java.util.HashMap;
 import java.util.Map;
 

caching/src/test/java/com/iluwatar/caching/database/MongoDbTest.java

@@ -55,7 +55,7 @@ class MongoDbTest {
   @BeforeEach
   void init() {
     db = mock(MongoDatabase.class);
-    mongoDb.setDB(db);
+    mongoDb.setDb(db);
     userAccount = new UserAccount(ID, NAME, ADDITIONAL_INFO);
   }
 

checkstyle-suppressions.xml

@@ -7,4 +7,5 @@
   <suppress checks="[a-zA-Z0-9]*" files="[\\/]src[\\/]main[\\/]resources[\\/]" />
   <suppress checks="LineLength" files="." />
   <suppress checks="EmptyLineSeparator" files="." />
+  <suppress checks="RequireEmptyLineBeforeBlockTagGroup" files=".*\.java"/>
 </suppressions>

collecting-parameter/src/test/java/com/iluwatar/collectingparameter/CollectingParameterTest.java

@@ -27,7 +27,6 @@
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.Timeout;
-
 import java.util.LinkedList;
 import java.util.Queue;
 

collecting-parameter/src/test/java/com/iluwatar/collectingparameter/PrinterQueueTest.java

@@ -27,7 +27,6 @@
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.Timeout;
-
 import java.util.LinkedList;
 import java.util.Queue;
 

commander/src/main/java/com/iluwatar/commander/Service.java

@@ -25,7 +25,6 @@
 package com.iluwatar.commander;
 
 import com.iluwatar.commander.exceptions.DatabaseUnavailableException;
-
 import java.security.SecureRandom;
 import java.util.ArrayList;
 import java.util.Hashtable;

commander/src/main/java/com/iluwatar/commander/employeehandle/EmployeeDatabase.java

@@ -27,7 +27,6 @@
 import com.iluwatar.commander.Database;
 import com.iluwatar.commander.Order;
 import com.iluwatar.commander.exceptions.DatabaseUnavailableException;
-
 import java.util.HashMap;
 import java.util.Map;
 

commander/src/test/java/com/iluwatar/commander/CommanderTest.java

@@ -37,10 +37,8 @@
 import com.iluwatar.commander.queue.QueueDatabase;
 import com.iluwatar.commander.shippingservice.ShippingDatabase;
 import com.iluwatar.commander.shippingservice.ShippingService;
-
 import org.junit.jupiter.api.Test;
 import org.junit.platform.commons.util.StringUtils;
-
 import java.util.ArrayList;
 import java.util.List;
 

composite-view/src/test/java/com/iluwatar/compositeview/AppServletTest.java

@@ -29,7 +29,6 @@
 import jakarta.servlet.http.HttpServletResponse;
 import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
-
 import java.io.PrintWriter;
 import java.io.StringWriter;
 

context-object/src/main/java/com/iluwatar/context/object/LayerA.java

@@ -26,6 +26,9 @@
 
 import lombok.Getter;
 
+/**
+ * Layer A in the context object pattern.
+ */
 @Getter
 public class LayerA {
 

context-object/src/main/java/com/iluwatar/context/object/LayerB.java

@@ -26,6 +26,9 @@
 
 import lombok.Getter;
 
+/**
+ * Layer B in the context object pattern.
+ */
 @Getter
 public class LayerB {
 

context-object/src/main/java/com/iluwatar/context/object/LayerC.java

@@ -26,6 +26,9 @@
 
 import lombok.Getter;
 
+/**
+ * Layer C in the context object pattern.
+ */
 @Getter
 public class LayerC {
 

cqrs/src/main/java/com/iluwatar/cqrs/commandes/ICommandService.java renamed to cqrs/src/main/java/com/iluwatar/cqrs/commandes/CommandService.java

@@ -27,7 +27,7 @@
 /**
  * This interface represents the commands of the CQRS pattern.
  */
-public interface ICommandService {
+public interface CommandService {
 
   void authorCreated(String username, String name, String email);
 

cqrs/src/main/java/com/iluwatar/cqrs/commandes/CommandServiceImpl.java

@@ -30,10 +30,10 @@
 import org.hibernate.SessionFactory;
 
 /**
- * This class is an implementation of {@link ICommandService} interface. It uses Hibernate as an api
+ * This class is an implementation of {@link CommandService} interface. It uses Hibernate as an api
  * for persistence.
  */
-public class CommandServiceImpl implements ICommandService {
+public class CommandServiceImpl implements CommandService {
 
   private final SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
 

cqrs/src/main/java/com/iluwatar/cqrs/queries/IQueryService.java renamed to cqrs/src/main/java/com/iluwatar/cqrs/queries/QueryService.java

@@ -32,7 +32,7 @@
 /**
  * This interface represents the query methods of the CQRS pattern.
  */
-public interface IQueryService {
+public interface QueryService {
 
   Author getAuthorByUsername(String username);
 

cqrs/src/main/java/com/iluwatar/cqrs/queries/QueryServiceImpl.java

@@ -34,51 +34,51 @@
 import org.hibernate.query.Query;
 
 /**
- * This class is an implementation of {@link IQueryService}. It uses Hibernate native queries to
+ * This class is an implementation of {@link QueryService}. It uses Hibernate native queries to
  * return DTOs from the database.
  */
-public class QueryServiceImpl implements IQueryService {
+public class QueryServiceImpl implements QueryService {
 
   private final SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
 
   @Override
   public Author getAuthorByUsername(String username) {
-    Author authorDTo;
+    Author authorDto;
     try (var session = sessionFactory.openSession()) {
       Query<Author> sqlQuery = session.createQuery(
               "select new com.iluwatar.cqrs.dto.Author(a.name, a.email, a.username)"
                       + " from com.iluwatar.cqrs.domain.model.Author a where a.username=:username");
       sqlQuery.setParameter(AppConstants.USER_NAME, username);
-      authorDTo = sqlQuery.uniqueResult();
+      authorDto = sqlQuery.uniqueResult();
     }
-    return authorDTo;
+    return authorDto;
   }
 
   @Override
   public Book getBook(String title) {
-    Book bookDTo;
+    Book bookDto;
     try (var session = sessionFactory.openSession()) {
       Query<Book> sqlQuery = session.createQuery(
               "select new com.iluwatar.cqrs.dto.Book(b.title, b.price)"
                       + " from com.iluwatar.cqrs.domain.model.Book b where b.title=:title");
       sqlQuery.setParameter("title", title);
-      bookDTo = sqlQuery.uniqueResult();
+      bookDto = sqlQuery.uniqueResult();
     }
-    return bookDTo;
+    return bookDto;
   }
 
   @Override
   public List<Book> getAuthorBooks(String username) {
-    List<Book> bookDTos;
+    List<Book> bookDtos;
     try (var session = sessionFactory.openSession()) {
       Query<Book> sqlQuery = session.createQuery(
               "select new com.iluwatar.cqrs.dto.Book(b.title, b.price)"
                       + " from com.iluwatar.cqrs.domain.model.Author a, com.iluwatar.cqrs.domain.model.Book b "
                       + "where b.author.id = a.id and a.username=:username");
       sqlQuery.setParameter(AppConstants.USER_NAME, username);
-      bookDTos = sqlQuery.list();
+      bookDtos = sqlQuery.list();
     }
-    return bookDTos;
+    return bookDtos;
   }
 
   @Override

cqrs/src/test/java/com/iluwatar/cqrs/IntegrationTest.java

@@ -30,7 +30,7 @@
 import com.iluwatar.cqrs.commandes.CommandServiceImpl;
 import com.iluwatar.cqrs.dto.Author;
 import com.iluwatar.cqrs.dto.Book;
-import com.iluwatar.cqrs.queries.IQueryService;
+import com.iluwatar.cqrs.queries.QueryService;
 import com.iluwatar.cqrs.queries.QueryServiceImpl;
 import java.math.BigInteger;
 import org.junit.jupiter.api.BeforeAll;
@@ -41,7 +41,7 @@
  */
 class IntegrationTest {
 
-  private static IQueryService queryService;
+  private static QueryService queryService;
 
   @BeforeAll
   static void initializeAndPopulateDatabase() {

currying/src/test/java/com/iluwatar/currying/BookCurryingTest.java

@@ -28,7 +28,6 @@
 
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
-
 import java.time.LocalDate;
 
 /**

data-transfer-object/src/test/java/com/iluwatar/datatransfer/customer/CustomerResourceTest.java

@@ -29,7 +29,6 @@
 
 import java.util.ArrayList;
 import java.util.List;
-
 import com.iluwatar.datatransfer.customer.CustomerDto;
 import com.iluwatar.datatransfer.customer.CustomerResource;
 import org.junit.jupiter.api.Test;

dependency-injection/src/test/java/com/iluwatar/dependency/injection/utils/InMemoryAppender.java

@@ -28,7 +28,6 @@
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
 import org.slf4j.LoggerFactory;
-
 import java.util.LinkedList;
 import java.util.List;
 

domain-model/src/main/java/com/iluwatar/domainmodel/App.java

@@ -29,7 +29,6 @@
 import java.sql.SQLException;
 import java.time.LocalDate;
 import javax.sql.DataSource;
-
 import org.h2.jdbcx.JdbcDataSource;
 import org.joda.money.Money;
 

domain-model/src/main/java/com/iluwatar/domainmodel/Customer.java

@@ -28,7 +28,6 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
-
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NonNull;

domain-model/src/main/java/com/iluwatar/domainmodel/CustomerDao.java

@@ -27,6 +27,9 @@
 import java.sql.SQLException;
 import java.util.Optional;
 
+/**
+ * DAO interface for customer transactions.
+ */
 public interface CustomerDao {
 
   Optional<Customer> findByName(String name) throws SQLException;