Add a simple code formatting configuration

Author: marko-bekhta

.gitignore

@@ -38,6 +38,7 @@ nb-configuration.xml
 
 # Local environment
 .env
+.cache
 
 # Plugin directory
 /.quarkus/cli/plugins/

pom.xml

@@ -18,6 +18,8 @@
         <version.assertj>3.26.0</version.assertj>
         <skipITs>true</skipITs>
         <surefire-plugin.version>3.3.1</surefire-plugin.version>
+        <spotless-maven-plugin.version>2.43.0</spotless-maven-plugin.version>
+        <spotless.goal>apply</spotless.goal>
     </properties>
 
     <dependencyManagement>
@@ -164,6 +166,50 @@
                     </systemPropertyVariables>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>com.diffplug.spotless</groupId>
+                <artifactId>spotless-maven-plugin</artifactId>
+                <version>${spotless-maven-plugin.version}</version>
+                <configuration>
+                    <upToDateChecking>
+                        <enabled>true</enabled>
+                        <indexFile>.cache/spotless-index-${spotless-maven-plugin.version}</indexFile>
+                    </upToDateChecking>
+                    <java>
+                        <toggleOffOn/>
+                        <includes>
+                            <include>src/**/*.java</include>
+                        </includes>
+                        <indent>
+                            <tabs>true</tabs>
+                            <spacesPerTab>4</spacesPerTab>
+                        </indent>
+                        <importOrder>
+                            <order>\#,java,javax,org.hibernate,org.junit,org.jboss,</order>
+                        </importOrder>
+                        <trimTrailingWhitespace/>
+                        <endWithNewline/>
+                        <eclipse></eclipse>
+                        <removeUnusedImports>
+                            <!-- default one fails to process the classes -->
+                            <engine>cleanthat-javaparser-unnecessaryimport</engine>
+                        </removeUnusedImports>
+                        <replaceRegex>
+                            <name>Remove wildcard imports</name>
+                            <searchRegex>^import\s+[^\*\s]+\*;$</searchRegex>
+                            <replacement>$1</replacement>
+                        </replaceRegex>
+                    </java>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>${spotless.goal}</goal>
+                        </goals>
+                        <phase>compile</phase>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 
@@ -180,5 +226,11 @@
                 <quarkus.native.enabled>true</quarkus.native.enabled>
             </properties>
         </profile>
+        <profile>
+            <id>ci-build</id>
+            <properties>
+                <spotless.goal>check</spotless.goal>
+            </properties>
+        </profile>
     </profiles>
 </project>