Merged master (#13525)

* Bump to Groovy `3.0.8`

* SQL queries conventions

* Test `JsonGenerator`

* Align tests with `Spock` testing framework

* Reformat and single liner `read*` methods

* Minor fixes for Trait subject

* Align tests with `Spock` testing framework

* Minor fixes for Trait subject

* fix: Typos in Avro module

* Data Type in Groovy: align with `Spock` testing framework

* Metaprogramming: Align with groovy version `3.0.8` and use spock testing framework

* Categories: code reformat

* Maps in Groovy: convert to spock test framework

* Finding Elements in Collections in Groovy: refactor to use spock testing framework

* Lists in Groovy: refactor to use spock testing framework

* A Quick Guide to Iterating a Map in Groovy: refactor to use spock testing framework

* How to Remove a Prefix From Strings in Groovy: refactor to use spock testing framework

* added code of collections-vs-stream

* added setup and teardown method

* rename the package

* removed unwanted code

* removed transactional annotation

* renamed the Test class

* Feature/bael 6101 singleton (#13325)

* BAEL-6101: singleton bean and pattern example

* BAEL-6101: change package

* BAEL-6101: refactor

* BAEL-6101: refactor

* BAEL-6101: PR comment fix

* [BAEL-5788] Accessing Private Constructor

* BAEL-6097: Pitfalls on Testing with Spring Boot (#13441)

* BAEL-6097: Create project

* BAEL-6097: Implement sample code and tests with custom test slices

* BAEL-6097: Fix application-test.yml

* BAEL-6097: Rename tests to match BDD naming strategy, add test for Mapper Integration Test

* Difference Between Function(String… args) and Function(String[] args) (#13473)

* BAEL-6210: Examples for RethinkDB article (#13481)

* JAVA-17608 Restored AtomicInteger default increment method

* [JAVA-16376] Moved apache-poi, apache-velocity,di-modules,asciidoctor… (#13461)

* [JAVA-16376] Moved apache-poi, apache-velocity,di-modules,asciidoctor,aws-modules to jdk9-and-above profile

* [JAVA-16376] testing war plugin

* [JAVA-16376] Upgraded asciidoctor dependencies

* [JAVA-16376] Upgraded lombok version

* [JAVA-16376] Upgraded guice version

* [JAVA-16376] Clean up properties

* BAEL-6046 - MongoDB - Field Level Encryption (#13440)

* bael-6046 - first draft

* review 1

* review 2

* null checks and lambda

* BAEL-6162: Code examples from article (#13458)

* Code example from article

* BAEL-6162: Add unit tests

* Rename test class

* Updated Instancio version

* [JAVA-16376] Moved spring-reactive-modules to jdk9-and-above profile (#13470)

* [JAVA-16376] Moved spring-reactive-modules to jdk9-and-above profile

* [JAVA-16376] Upgraded geotools dependencies and moved module to jdk9-and-above profile

* [JAVA-16376] Replaced vividsolutions artifact with  locationtech

* [JAVA-16376] Moved data-structures to jdk9-and-above profile

* [JAVA-16376] Moved deeplearning4j module to jdk9-and-above profile

---------

Co-authored-by: Dhawal Kapil <dhawalkapil@gmail.com>

* BAEL-5288 Code for the Map Date Types With openapi generator article (#13467)

Co-authored-by: thibault.faure <thibault.faure@mimacom.com>

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Create README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* Update README.md

[skip ci]

* [2lists-to-map] Combining Two Lists into a Map in Java (#13484)

* [2lists-to-map] Combining Two Lists into a Map in Java

* [2lists-to-map] rename package

* JAVA-17429 Upgrade to latest spring-boot-2 (#13480)

* [BAEL-6027] Add example for Awaitility and Thread.sleep comparison (#13450)

* Add example for Awaitility and Thread.sleep comparison

* Fix unit test method name and indentation.

* Use property in pom.xml for awaitility dependency version.

---------

Co-authored-by: Uhrin Attila <attila.uhrin@frontendart.com>

* BAEL-6100-Add-example-code-for-integer-array-to-strings-using-streams… (#13375)

* BAEL-6100-Add-example-code-for-integer-array-to-strings-using-streams-tutorial

* BAEL-6100 remove wrongly added README update

* BAEL-6100 Add interger array to single string example

* BAEL-6100 Correct typo in test class name

* BAEL-4487 remove padding that causes non-deterministic behaviour (#13425)

* BAEL-6046 - MongoDB - Field Level Encryption (#13494)

* [JAVA-6143] java copy from one hashmap to another (#13497)

Co-authored-by: Bhaskar <bhaskar.dastidar@freshworks.com>

* Update README.md

[skip ci]

* Update README.md

* Update README.md

* Bael 5190: Verify Digital Signatures in Java article (#13439)

* #BAEL-5190: add keystore and certificate files

* #BAEL-5190: add keystore address

* #BAEL-5190: update hashing

* #BAEL-5190: delete main classes

* #BAEL-5190: move keystore files to test directory

* #BAEL-5190: rename to DigitalSignatureUtils

* #BAEL-5190: main source code

* #BAEL-5190: main test source

* #BAEL-5190: update for testing

* #BAEL-5190: update keystore type

* #BAEL-5190: remove p12 keystores

* #BAEL-5190: add jks keystores

---------

Co-authored-by: h_sharifi <h_sharifi@modernisc.com>

* BAEL-6154: Migrate from Java 8 to Java 17 + tests (#13474)

* BAEL-4971 - Object mapping with Cassandra (#13427)

* BAEL-4971 - Object mapping with Cassandra

* BAEL-4971 - Object mapping with Cassandra

* BAEL-4971 - Object mapping with Cassandra - changing test name

* BAEL-4971 - Object mapping with Cassandra - code formatting

* BAEL-4971 - Object mapping with Cassandra - review incorporation

* JAVA-17818 Split or move spring-cloud-openfeign module (conti-2) (#13485)

Co-authored-by: timis1 <noreplay@yahoo.com>

* JAVA-2420 Merge spring-apache-camel and spring-boot-camel modules (#13409)

* JAVA-2420 Merge spring-apache-camel and spring-boot-camel modules

* JAVA-2420 Migrate spring-boot-camel to spring-apache camel

* JAVA-2420 Update README.md file

* JAVA-2420 Remove spring-boot-camel

---------

Co-authored-by: timis1 <noreplay@yahoo.com>

* JAVA-14723 Convert spring-mvc-basics-4 to Spring Boot project and upd… (#13399)

* JAVA-14723 Convert spring-mvc-basics-4 to Spring Boot project and update articles

* JAVA-14723 Refactoring and remove unused files

* JAVA-14723 remove the WEB-INF and migrate jsp to html

* JAVA-14723 Add back the removed test and rename the test into: ArticleViewerControllerWithRequiredAttributeIntegrationTest

---------

Co-authored-by: timis1 <noreplay@yahoo.com>

* JAVA-18445 Cleanup un-committed or un-ignored artifacts - Week 6 - 2023 (conti-1) (moved-1) (#13510)

Co-authored-by: timis1 <noreplay@yahoo.com>

* JAVA-18132 Upgrade custom-pmd module to JDK 11 (#13500)

Co-authored-by: timis1 <noreplay@yahoo.com>

* BAEL-6069: Exclude dependency in a Maven plugin (#13508)

* BAEL-5549: feat: Hibernate Keywords - using keywords as table column names (#13355)

* BAEL-5549: feat: Hibernate Keywords - using keywords as table column names

* BAEL-5549: feat: Hibernate Keywords - using keywords as table column names

* BAEL-5549: feat: Hibernate Keywords - using keywords as table column names

* BAEL-5549: fix: Hibernate Keywords - alter the "where" value to make sure it is obvious that it is not the value but the @Column that is causing the error.

* BAEL-5549: doc: Hibernate Keywords - revert README changes

* [JAVA-18124] Moved apache-libraries module to jdk9-and-above profile (#13502)

* [JAVA-18124] Moved apache-libraries module to jdk9-and-above profile

* [JAVA-18124] Upgrade beam version

* BAEL-5912 Introduction to RoaringBitmap (#13326)

* Finding All Duplicates in a List in Java- BAEL-6075 (#13291)

* Deep & Shallow Copy

* Revert "Deep & Shallow Copy"

This reverts commit 62f75b00

.

* duplicates in a list in java

* Unit test changes

* unit test changes

* Tests change after review

* Code formatted

* code formatted

* new module core-java-lang-6

* entry in parent pom and test setup method name change

* module renamed

* parent pom entry added

* pom.xml changes reverted

* Bael 6069 (#13521)

* BAEL-6069: Exclude dependency in a Maven plugin

* BAEL-6069: rename project

* [JAVA-16376] Moved quarkus-modules to jdk9-and-above profile (#13487)

* [JAVA-16376] Moved quarkus-modules to jdk9-and-above profile

* [JAVA-18171] Moved reactive-systems module to jdk9-and-above profile

* [JAVA-18170] Moved rxjava-modules to jdk9-and-above profile

* [JAVA-18165] Moved patterns-modules to jdk9-and-above profile

* [JAVA-18168] Upgraded quarkus version

* [JAVA-16394] Moved groovy modules to jdk9-and-above profile

* [JAVA-18165] Reverted changes for pattern-modules

* [JAVA-16394] Upgraded dependencies to latest versions

* [JAVA-18134] Upgraded guava-modules to java 11 and moved to jdk9-and-above profile

* [JAVA-16394] Fixed groovy-eclipse-batch dependency version

---------

Co-authored-by: Dhawal Kapil <dhawalkapil@gmail.com>

---------

Co-authored-by: Alex Golub <a12thu@gmail.com>
Co-authored-by: gantoin <gantoin@pm.me>
Co-authored-by: Amit Kumatr <amit.kumar@fyndna.com>
Co-authored-by: Daniel Strmecki <daniel.strmecki@gmail.com>
Co-authored-by: Stef Serban-Cristian <stef.serban.cristian@gmail.com>
Co-authored-by: Ralf Ueberfuhr <40685729+ueberfuhr@users.noreply.github.com>
Co-authored-by: davidmartinezbarua <davmb5@gmail.com>
Co-authored-by: Iniubong LA <arthurshur@gmail.com>
Co-authored-by: Graham Cox <graham@grahamcox.co.uk>
Co-authored-by: Anastasios Ioannidis <anastasios.ioannidisa@gmail.com>
Co-authored-by: Loredana Crusoveanu <lore.crusoveanu@gmail.com>
Co-authored-by: panos-kakos <102670093+panos-kakos@users.noreply.github.com>
Co-authored-by: Ulisses Lima <ulisseslima@users.noreply.github.com>
Co-authored-by: Michael Pratt <prattm@gmail.com>
Co-authored-by: Arman Sharif <armandino@gmail.com>
Co-authored-by: thibaultfaure <thibault.faure.pro@gmail.com>
Co-authored-by: thibault.faure <thibault.faure@mimacom.com>
Co-authored-by: edizor <113095366+edizor@users.noreply.github.com>
Co-authored-by: Kai Yuan <kent.yuan@Gmail.com>
Co-authored-by: Anastasios Ioannidis <121166333+anastasiosioannidis@users.noreply.github.com>
Co-authored-by: AttilaUhrin <uhrin.attila1@gmail.com>
Co-authored-by: Uhrin Attila <attila.uhrin@frontendart.com>
Co-authored-by: sam-gardner <53271849+sam-gardner@users.noreply.github.com>
Co-authored-by: Shaun Phillips <61982125+ShaPhi7@users.noreply.github.com>
Co-authored-by: Bhaskar Ghosh Dastidar <dastidar.bhaskar@gmail.com>
Co-authored-by: Bhaskar <bhaskar.dastidar@freshworks.com>
Co-authored-by: Hamid Reza Sharifi <hmdrzsharifi@gmail.com>
Co-authored-by: h_sharifi <h_sharifi@modernisc.com>
Co-authored-by: Palaniappan Arunachalam <palaniappan.ar@gmail.com>
Co-authored-by: Abhinav Pandey <abhinavpandey312@gmail.com>
Co-authored-by: timis1 <12120641+timis1@users.noreply.github.com>
Co-authored-by: timis1 <noreplay@yahoo.com>
Co-authored-by: ACHRAF TAITAI <43656331+achraftt@users.noreply.github.com>
Co-authored-by: Grzegorz Musiał <grzegorz@musial.tk>
Co-authored-by: alemoles <alemolerio@gmail.com>
Co-authored-by: 2406ankita <41814570+2406ankita@users.noreply.github.com>

.gitignore

@@ -107,4 +107,7 @@ spring-boot-modules/spring-boot-properties-3/*.log
 .sdkmanrc
 
 # Localstack
-**/.localstack
\ No newline at end of file
+**/.localstack
+
+#web-modules/ninja
+devDb*.db
\ No newline at end of file

README.md

@@ -31,7 +31,7 @@ The projects are broadly divided into 3 lists: first, second and heavy.
 
 Next, they are segregated further on the basis of the tests that we want to execute.
 
-Additionally, there are 2 profiles dedicated for JDK9 and above builds.
+Additionally, there are 2 profiles dedicated for JDK9 and above builds - **which require JDK 17**.
 
 We also have a parents profile to build only parent modules.
 

apache-libraries/pom.xml

@@ -118,11 +118,6 @@
             <artifactId>curator-recipes</artifactId>
             <version>${curator.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.zookeeper</groupId>
-            <artifactId>zookeeper</artifactId>
-            <version>${zookeeper.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-core</artifactId>
@@ -191,10 +186,8 @@
     </build>
 
     <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
         <avro.version>1.8.2</avro.version>
-        <beam.version>2.19.0</beam.version>
+        <beam.version>2.45.0</beam.version>
         <bval.version>1.1.2</bval.version>
         <javax.validation.validation-api.version>1.1.0.Final</javax.validation.validation-api.version>
         <meecrowave-junit.version>1.2.0</meecrowave-junit.version>

apache-libraries/src/main/java/com/baeldung/avro/util/serealization/AvroDeSerealizer.java → apache-libraries/src/main/java/com/baeldung/avro/util/serialization/AvroDeSerializer.java

-package com.baeldung.avro.util.serealization;
+package com.baeldung.avro.util.serialization;
 
 import com.baeldung.avro.util.model.AvroHttpRequest;
 import org.apache.avro.io.DatumReader;
@@ -10,11 +10,11 @@ import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 
-public class AvroDeSerealizer {
+public class AvroDeSerializer {
 
-    private static Logger logger = LoggerFactory.getLogger(AvroDeSerealizer.class);
+    private static Logger logger = LoggerFactory.getLogger(AvroDeSerializer.class);
 
-    public AvroHttpRequest deSerealizeAvroHttpRequestJSON(byte[] data) {
+    public AvroHttpRequest deSerializeAvroHttpRequestJSON(byte[] data) {
         DatumReader<AvroHttpRequest> reader = new SpecificDatumReader<>(AvroHttpRequest.class);
         Decoder decoder = null;
         try {
@@ -27,7 +27,7 @@ public class AvroDeSerealizer {
         return null;
     }
 
-    public AvroHttpRequest deSerealizeAvroHttpRequestBinary(byte[] data) {
+    public AvroHttpRequest deSerializeAvroHttpRequestBinary(byte[] data) {
         DatumReader<AvroHttpRequest> employeeReader = new SpecificDatumReader<>(AvroHttpRequest.class);
         Decoder decoder = DecoderFactory.get()
             .binaryDecoder(data, null);

apache-libraries/src/main/java/com/baeldung/avro/util/serealization/AvroSerealizer.java → apache-libraries/src/main/java/com/baeldung/avro/util/serialization/AvroSerializer.java

-package com.baeldung.avro.util.serealization;
+package com.baeldung.avro.util.serialization;
 
 import com.baeldung.avro.util.model.AvroHttpRequest;
 import org.apache.avro.io.*;
@@ -9,11 +9,11 @@ import org.slf4j.LoggerFactory;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 
-public class AvroSerealizer {
+public class AvroSerializer {
 
-    private static final Logger logger = LoggerFactory.getLogger(AvroSerealizer.class);
+    private static final Logger logger = LoggerFactory.getLogger(AvroSerializer.class);
 
-    public byte[] serealizeAvroHttpRequestJSON(AvroHttpRequest request) {
+    public byte[] serializeAvroHttpRequestJSON(AvroHttpRequest request) {
         DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
         byte[] data = new byte[0];
         ByteArrayOutputStream stream = new ByteArrayOutputStream();
@@ -30,7 +30,7 @@ public class AvroSerealizer {
         return data;
     }
 
-    public byte[] serealizeAvroHttpRequestBinary(AvroHttpRequest request) {
+    public byte[] serializeAvroHttpRequestBinary(AvroHttpRequest request) {
         DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
         byte[] data = new byte[0];
         ByteArrayOutputStream stream = new ByteArrayOutputStream();

apache-libraries/src/test/java/com/baeldung/avro/util/serealization/AvroSerealizerDeSerealizerIntegrationTest.java → apache-libraries/src/test/java/com/baeldung/avro/util/serialization/AvroSerializerDeSerializerIntegrationTest.java

-package com.baeldung.avro.util.serealization;
+package com.baeldung.avro.util.serialization;
 
 import com.baeldung.avro.util.model.Active;
 import com.baeldung.avro.util.model.AvroHttpRequest;
@@ -13,16 +13,16 @@ import java.util.Objects;
 
 import static org.junit.Assert.*;
 
-public class AvroSerealizerDeSerealizerIntegrationTest {
+public class AvroSerializerDeSerializerIntegrationTest {
 
-    AvroSerealizer serealizer;
-    AvroDeSerealizer deSerealizer;
+    AvroSerializer serializer;
+    AvroDeSerializer deserializer;
     AvroHttpRequest request;
 
     @Before
     public void setUp() throws Exception {
-        serealizer = new AvroSerealizer();
-        deSerealizer = new AvroDeSerealizer();
+        serializer = new AvroSerializer();
+        deserializer = new AvroDeSerializer();
 
         ClientIdentifier clientIdentifier = ClientIdentifier.newBuilder()
             .setHostName("localhost")
@@ -49,22 +49,22 @@ public class AvroSerealizerDeSerealizerIntegrationTest {
 
     @Test
     public void WhenSerializedUsingJSONEncoder_thenObjectGetsSerialized() {
-        byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
+        byte[] data = serializer.serializeAvroHttpRequestJSON(request);
         assertTrue(Objects.nonNull(data));
         assertTrue(data.length > 0);
     }
 
     @Test
     public void WhenSerializedUsingBinaryEncoder_thenObjectGetsSerialized() {
-        byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
+        byte[] data = serializer.serializeAvroHttpRequestBinary(request);
         assertTrue(Objects.nonNull(data));
         assertTrue(data.length > 0);
     }
 
     @Test
     public void WhenDeserializeUsingJSONDecoder_thenActualAndExpectedObjectsAreEqual() {
-        byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
-        AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestJSON(data);
+        byte[] data = serializer.serializeAvroHttpRequestJSON(request);
+        AvroHttpRequest actualRequest = deserializer.deSerializeAvroHttpRequestJSON(data);
         assertEquals(actualRequest, request);
         assertTrue(actualRequest.getRequestTime()
             .equals(request.getRequestTime()));
@@ -72,12 +72,12 @@ public class AvroSerealizerDeSerealizerIntegrationTest {
 
     @Test
     public void WhenDeserializeUsingBinaryecoder_thenActualAndExpectedObjectsAreEqual() {
-        byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
-        AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestBinary(data);
+        byte[] data = serializer.serializeAvroHttpRequestBinary(request);
+        AvroHttpRequest actualRequest = deserializer.deSerializeAvroHttpRequestBinary(data);
         assertEquals(actualRequest, request);
         assertTrue(actualRequest.getRequestTime()
             .equals(request.getRequestTime()));
     }
-    
+
 }
 

apache-velocity/pom.xml

@@ -63,6 +63,7 @@
         <org.apache.httpcomponents.version>4.5.2</org.apache.httpcomponents.version>
         <velocity-version>1.7</velocity-version>
         <velocity-tools-version>2.0</velocity-tools-version>
+        <maven-war-plugin.version>3.3.2</maven-war-plugin.version>
     </properties>
 
 </project>
\ No newline at end of file

asciidoctor/pom.xml

@@ -62,10 +62,10 @@
     </build>
 
     <properties>
-        <asciidoctor-maven-plugin.version>1.5.6</asciidoctor-maven-plugin.version>
-        <asciidoctorj.version>1.5.6</asciidoctorj.version>
-        <asciidoctorj-pdf.version>1.5.0-alpha.15</asciidoctorj-pdf.version>
-        <asciidoctorj-pdf.plugin.version>1.5.0-alpha.15</asciidoctorj-pdf.plugin.version>
+        <asciidoctor-maven-plugin.version>2.2.2</asciidoctor-maven-plugin.version>
+        <asciidoctorj.version>2.5.7</asciidoctorj.version>
+        <asciidoctorj-pdf.version>2.3.4</asciidoctorj-pdf.version>
+        <asciidoctorj-pdf.plugin.version>2.3.4</asciidoctorj-pdf.plugin.version>
     </properties>
 
 </project>
\ No newline at end of file

aws-modules/aws-reactive/pom.xml

@@ -77,6 +77,7 @@
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
         </dependency>
     </dependencies>
 
@@ -92,6 +93,7 @@
     <properties>
         <spring.version>2.2.1.RELEASE</spring.version>
         <awssdk.version>2.17.283</awssdk.version>
+        <lombok.version>1.18.20</lombok.version>
     </properties>
 
 </project>
\ No newline at end of file

azure/pom.xml

@@ -36,8 +36,8 @@
             <scope>runtime</scope>
         </dependency>
         <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
             <scope>runtime</scope>
         </dependency>
     </dependencies>

core-groovy-modules/core-groovy-2/pom.xml

@@ -83,7 +83,7 @@
                     <dependency>
                         <groupId>org.codehaus.groovy</groupId>
                         <artifactId>groovy-eclipse-batch</artifactId>
-                        <version>${groovy.version}-01</version>
+                        <version>${groovy-eclipse-batch.version}</version>
                     </dependency>
                 </dependencies>
             </plugin>
@@ -155,16 +155,18 @@
 
     <repositories>
         <repository>
-            <id>central</id>
-            <url>https://jcenter.bintray.com</url>
+            <id>maven_central</id>
+            <name>Maven Central</name>
+            <url>https://repo.maven.apache.org/maven2/</url>
         </repository>
     </repositories>
 
     <properties>
         <groovy-wslite.version>1.1.3</groovy-wslite.version>
-        <assembly.plugin.version>3.1.0</assembly.plugin.version>
-        <compiler.plugin.version>3.8.0</compiler.plugin.version>
-        <groovy.compiler.version>3.3.0-01</groovy.compiler.version>
+        <assembly.plugin.version>3.4.2</assembly.plugin.version>
+        <compiler.plugin.version>3.8.1</compiler.plugin.version>
+        <groovy.compiler.version>3.7.0</groovy.compiler.version>
+        <groovy-eclipse-batch.version>3.0.8-01</groovy-eclipse-batch.version>
     </properties>
 
-</project>
\ No newline at end of file
+</project>

core-groovy-modules/core-groovy-2/src/main/groovy/com/baeldung/category/BaeldungCategory.groovy

-package com.baeldung.category;
+package com.baeldung.category
 
 class BaeldungCategory {
 
-    public static String capitalize(String self) {
-        String capitalizedStr = self;
+    static String capitalize(String self) {
+        String capitalizedStr = self
         if (self.size() > 0) {
-            capitalizedStr = self.substring(0, 1).toUpperCase() + self.substring(1);
+            capitalizedStr = self.substring(0, 1).toUpperCase() + self.substring(1)
         }
+        
         return capitalizedStr
     }
-    
-    public static double toThePower(Number self, Number exponent) {
-        return Math.pow(self, exponent);
-    }
 
+    static double toThePower(Number self, Number exponent) {
+        return Math.pow(self, exponent)
+    }
 }

core-groovy-modules/core-groovy-2/src/main/groovy/com/baeldung/category/NumberCategory.groovy

-package com.baeldung.category;
-
-import groovy.lang.Category
+package com.baeldung.category
 
 @Category(Number)
 class NumberCategory {
 
-    public Number cube() {
-        return this*this*this
+    Number cube() {
+        return this**3
     }
 
-    public int divideWithRoundUp(BigDecimal divisor, boolean isRoundUp) {
+    int divideWithRoundUp(BigDecimal divisor, boolean isRoundUp) {
         def mathRound = isRoundUp ? BigDecimal.ROUND_UP : BigDecimal.ROUND_DOWN
-        return (int)new BigDecimal(this).divide(divisor, 0, mathRound)
+        
+        return (int) new BigDecimal(this).divide(divisor, 0, mathRound)
     }
-
 }

core-groovy-modules/core-groovy-2/src/main/groovy/com/baeldung/determinedatatype/Person.groovy

 package com.baeldung.determinedatatype
 
 class Person {
-    
-    private int ageAsInt
-    private Double ageAsDouble
-    private String ageAsString
-    
+
+    int ageAsInt
+    Double ageAsDouble
+    String ageAsString
+
     Person() {}
-    Person(int ageAsInt) { this.ageAsInt =  ageAsInt}
-    Person(Double ageAsDouble) { this.ageAsDouble =  ageAsDouble}
-    Person(String ageAsString) { this.ageAsString =  ageAsString}    
+
+    Person(int ageAsInt) { this.ageAsInt = ageAsInt }
+
+    Person(Double ageAsDouble) { this.ageAsDouble = ageAsDouble }
+
+    Person(String ageAsString) { this.ageAsString = ageAsString }
+}
+
+class Student extends Person {
 }
-class Student extends Person {}

core-groovy-modules/core-groovy-2/src/main/groovy/com/baeldung/metaprogramming/Employee.groovy

 package com.baeldung.metaprogramming
 
-import groovy.transform.AutoClone
-import groovy.transform.Canonical
-import groovy.transform.EqualsAndHashCode
-import groovy.transform.ToString
-import groovy.transform.TupleConstructor
-import groovy.util.logging.*
+import groovy.transform.*
+import groovy.util.logging.Log
 
-@Canonical
+@ToString(includePackage = false, excludes = ['id'])
 @TupleConstructor
 @EqualsAndHashCode
-@ToString(includePackage=false, excludes=['id'])
-@Log 
-@AutoClone
+@Canonical
+@AutoClone(style = AutoCloneStyle.SIMPLE)
+@Log
 class Employee {
 
     long id
@@ -30,16 +26,15 @@ class Employee {
     def propertyMissing(String propertyName, propertyValue) {
         println "property '$propertyName' is not available"
         log.info "$propertyName is not available"
-        "property '$propertyName' is not available"
+        "property '$propertyName' with value '$propertyValue' is not available"
     }
 
-    def methodMissing(String methodName, def methodArgs) {
+    def methodMissing(String methodName, Object methodArgs) {
         log.info "$methodName is not defined"
         "method '$methodName' is not defined"
     }
-    
+
     def logEmp() {
         log.info "Employee: $lastName, $firstName is of $age years age"
     }
-
-}
\ No newline at end of file
+}

core-groovy-modules/core-groovy-2/src/main/groovy/com/baeldung/metaprogramming/extension/BasicExtensions.groovy

@@ -2,32 +2,31 @@ package com.baeldung.metaprogramming.extension
 
 import com.baeldung.metaprogramming.Employee
 
-import java.time.LocalDate
 import java.time.Year
 
 class BasicExtensions {
-    
+
     static int getYearOfBirth(Employee self) {
         return Year.now().value - self.age
     }
-    
+
     static String capitalize(String self) {
         return self.substring(0, 1).toUpperCase() + self.substring(1)
     }
 
     static void printCounter(Integer self) {
-        while (self>0) {
+        while (self > 0) {
             println self
             self--
         }
     }
-    
+
     static Long square(Long self) {
-        return self*self
+        return self * self
     }
-    
+
     static BigDecimal cube(BigDecimal self) {
-        return self*self*self
+        return self * self * self
     }
-    
-}
\ No newline at end of file
+
+}

core-groovy-modules/core-groovy-2/src/test/groovy/com/baeldung/category/CategoryUnitTest.groovy

 package com.baeldung.category
 
-import groovy.time.*
+import groovy.time.TimeCategory
+import groovy.xml.DOMBuilder
+import groovy.xml.QName
+import groovy.xml.dom.DOMCategory
+
 import java.text.SimpleDateFormat
-import groovy.xml.*
-import groovy.xml.dom.*
-import com.baeldung.category.BaeldungCategory
-import com.baeldung.category.NumberCategory
 
 class CategoryUnitTest extends GroovyTestCase {
 
     void test_whenUsingTimeCategory_thenOperationOnDate() {
         def jan_1_2019 = new Date("01/01/2019")
-        use (TimeCategory) {
+        use(TimeCategory) {
             assert jan_1_2019 + 10.seconds == new Date("01/01/2019 00:00:10")
 
             assert jan_1_2019 + 20.minutes == new Date("01/01/2019 00:20:00")
@@ -30,7 +30,7 @@ class CategoryUnitTest extends GroovyTestCase {
 
     void test_whenUsingTimeCategory_thenOperationOnNumber() {
         SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy")
-        use (TimeCategory) {
+        use(TimeCategory) {
             assert sdf.format(5.days.from.now) == sdf.format(new Date() + 5.days)
 
             sdf = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss")
@@ -57,7 +57,7 @@ class CategoryUnitTest extends GroovyTestCase {
 
         def root = baeldungArticlesDom.documentElement
 
-        use (DOMCategory) {
+        use(DOMCategory) {
             assert root.article.size() == 2
 
             def articles = root.article
@@ -75,27 +75,26 @@ class CategoryUnitTest extends GroovyTestCase {
             assert root.article[2].title.text() == "Metaprogramming in Groovy"
         }
     }
-    
+
     void test_whenUsingBaeldungCategory_thenCapitalizeString() {
-        use (BaeldungCategory) {
+        use(BaeldungCategory) {
             assert "norman".capitalize() == "Norman"
-        } 
+        }
     }
-    
+
     void test_whenUsingBaeldungCategory_thenOperationsOnNumber() {
-        use (BaeldungCategory) {
+        use(BaeldungCategory) {
             assert 50.toThePower(2) == 2500
             assert 2.4.toThePower(4) == 33.1776
         }
     }
-    
+
     void test_whenUsingNumberCategory_thenOperationsOnNumber() {
-        use (NumberCategory) {
+        use(NumberCategory) {
             assert 3.cube() == 27
             assert 25.divideWithRoundUp(6, true) == 5
             assert 120.23.divideWithRoundUp(6.1, true) == 20
             assert 150.9.divideWithRoundUp(12.1, false) == 12
         }
     }
-
 }

core-groovy-modules/core-groovy-2/src/test/groovy/com/baeldung/determinedatatype/PersonTest.groovy

 package com.baeldung.determinedatatype
 
-import org.junit.Assert
-import org.junit.Test
-import com.baeldung.determinedatatype.Person
-
-public class PersonTest {
-    
-    @Test
-    public void givenWhenParameterTypeIsInteger_thenReturnTrue() {
+import spock.lang.Specification
+
+class PersonTest extends Specification {
+
+    def "givenWhenParameterTypeIsIntegerThenReturnTrue"() {
+        given:
         Person personObj = new Person(10)
-        Assert.assertTrue(personObj.ageAsInt instanceof Integer)
+
+        expect:
+        personObj.ageAsInt.class == Integer
     }
-    
-    @Test
-    public void givenWhenParameterTypeIsDouble_thenReturnTrue() {
+
+    def "givenWhenParameterTypeIsDouble_thenReturnTrue"() {
+        given:
         Person personObj = new Person(10.0)
-        Assert.assertTrue((personObj.ageAsDouble).getClass() == Double)
+
+        expect:
+        personObj.ageAsDouble.class == Double
     }
-    
-    @Test
-    public void givenWhenParameterTypeIsString_thenReturnTrue() {
+
+    def "givenWhenParameterTypeIsString_thenReturnTrue"() {
+        given:
         Person personObj = new Person("10 years")
-        Assert.assertTrue(personObj.ageAsString.class == String)
+
+        expect:
+        personObj.ageAsString.class == String
     }
-    
-    @Test
-    public void givenClassName_WhenParameterIsInteger_thenReturnTrue() {
-        Assert.assertTrue(Person.class.getDeclaredField('ageAsInt').type == int.class)
+
+    def "givenClassName_WhenParameterIsInteger_thenReturnTrue"() {
+        expect:
+        Person.class.getDeclaredField('ageAsInt').type == int.class
     }
-    
-    @Test
-    public void givenWhenObjectIsInstanceOfType_thenReturnTrue() {
+
+    def "givenWhenObjectIsInstanceOfType_thenReturnTrue"() {
+        given:
         Person personObj = new Person()
-        Assert.assertTrue(personObj instanceof Person)
+
+        expect:
+        personObj.class == Person
     }
 
-    @Test
-    public void givenWhenInstanceIsOfSubtype_thenReturnTrue() {
+    def "givenWhenInstanceIsOfSubtype_thenReturnTrue"() {
+        given:
         Student studentObj = new Student()
-        Assert.assertTrue(studentObj in Person)
-    }
-    
-    @Test
-    public void givenGroovyList_WhenFindClassName_thenReturnTrue() {
-      def ageList = ['ageAsString','ageAsDouble', 10]   
-      Assert.assertTrue(ageList.class == ArrayList)     
-      Assert.assertTrue(ageList.getClass() == ArrayList)
-    }
-    
-    @Test
-    public void givenGrooyMap_WhenFindClassName_thenReturnTrue() {
-      def ageMap = [ageAsString: '10 years', ageAsDouble: 10.0]
-      Assert.assertFalse(ageMap.class == LinkedHashMap)
-    }
-}
\ No newline at end of file
+
+        expect:
+        studentObj.class.superclass == Person
+    }
+
+    def "givenGroovyList_WhenFindClassName_thenReturnTrue"() {
+        given:
+        def ageList = ['ageAsString', 'ageAsDouble', 10]
+
+        expect:
+        ageList.class == ArrayList
+        ageList.getClass() == ArrayList
+    }
+
+    def "givenGroovyMap_WhenFindClassName_thenReturnTrue"() {
+        given:
+        def ageMap = [ageAsString: '10 years', ageAsDouble: 10.0]
+
+        expect:
+        ageMap.getClass() == LinkedHashMap
+    }
+}

core-groovy-modules/core-groovy-2/src/test/groovy/com/baeldung/metaprogramming/MetaprogrammingUnitTest.groovy

 package com.baeldung.metaprogramming
 
+import spock.lang.Specification
 
-import java.time.LocalDate
-import java.time.Period
 import java.time.Year
 
-class MetaprogrammingUnitTest extends GroovyTestCase {
+class MetaprogrammingUnitTest extends Specification {
 
-    Employee emp = new Employee(firstName: "Norman", lastName: "Lewis")
+    Employee emp
 
-    void testPropertyMissing() {
-        assert emp.address == "property 'address' is not available"
+    void setup() {
+        emp = new Employee(firstName: "Norman", lastName: "Lewis")
     }
 
-    void testMethodMissing() {
+    def "testPropertyMissing"() {
+        expect:
+        emp.address == "property 'address' is not available"
+    }
+
+    def "testMethodMissing"() {
+        given:
         Employee emp = new Employee()
-        try {
-            emp.getFullName()
-        } catch(MissingMethodException e) {
-            println "method is not defined"
-        }
-        assert emp.getFullName() == "method 'getFullName' is not defined"
+
+        expect:
+        emp.getFullName() == "method 'getFullName' is not defined"
     }
 
-    void testMetaClassProperty() {
+    def "testMetaClassProperty"() {
+        when:
         Employee.metaClass.address = ""
-        emp = new Employee(firstName: "Norman", lastName: "Lewis", address: "US")
-        assert emp.address == "US"
+
+        and:
+        emp = new Employee(firstName: "Norman",
+                           lastName: "Lewis",
+                           address: "US")
+
+        then:
+        emp.address == "US"
     }
 
-    void testMetaClassMethod() {
+    def "testMetaClassMethod"() {
+        when:
         emp.metaClass.getFullName = {
             "$lastName, $firstName"
         }
-        assert emp.getFullName() == "Lewis, Norman"
+
+        then:
+        emp.getFullName() == "Lewis, Norman"
     }
 
-    void testMetaClassConstructor() {
-        try {
-            Employee emp = new Employee("Norman")
-        } catch(GroovyRuntimeException e) {
-            assert e.message == "Could not find matching constructor for: com.baeldung.metaprogramming.Employee(String)"
-        }
+    def "testOnlyNameConstructor"() {
+        when:
+        new Employee("Norman")
+
+        then:
+        thrown(GroovyRuntimeException)
+    }
 
+    def "testMetaClassConstructor"() {
+        when:
         Employee.metaClass.constructor = { String firstName ->
             new Employee(firstName: firstName)
         }
 
+        and:
         Employee norman = new Employee("Norman")
-        assert norman.firstName == "Norman"
-        assert norman.lastName == null
+
+        then:
+        norman.firstName == "Norman"
+        norman.lastName == null
     }
 
-    void testJavaMetaClass() {
+    def "testJavaMetaClass"() {
+        when:
         String.metaClass.capitalize = { String str ->
             str.substring(0, 1).toUpperCase() + str.substring(1)
         }
-        assert "norman".capitalize() == "Norman"
+
+        and:
+        String.metaClass.static.joinWith = { String delimiter, String... args ->
+            String.join(delimiter, args)
+        }
+
+        then:
+        "norman".capitalize() == "Norman"
+        String.joinWith(" -> ", "a", "b", "c") == "a -> b -> c"
     }
 
-    void testEmployeeExtension() {
+    def "testEmployeeExtension"() {
+        given:
         def age = 28
         def expectedYearOfBirth = Year.now() - age
         Employee emp = new Employee(age: age)
-        assert emp.getYearOfBirth() == expectedYearOfBirth.value
+
+        expect:
+        emp.getYearOfBirth() == expectedYearOfBirth.value
     }
 
-    void testJavaClassesExtensions() {
+    def "testJavaClassesExtensions"() {
+        when:
         5.printCounter()
 
-        assert 40l.square() == 1600l
-
-        assert (2.98).cube() == 26.463592
+        then:
+        40L.square() == 1600L
+        (2.98).cube() == 26.463592
     }
 
-    void testStaticEmployeeExtension() {
+    def "testStaticEmployeeExtension"() {
         assert Employee.getDefaultObj().firstName == "firstName"
         assert Employee.getDefaultObj().lastName == "lastName"
         assert Employee.getDefaultObj().age == 20
     }
 
-    void testToStringAnnotation() {
-        Employee employee = new Employee()
-        employee.id = 1
-        employee.firstName = "norman"
-        employee.lastName = "lewis"
-        employee.age = 28
+    def "testToStringAnnotation"() {
+        when:
+        Employee employee = new Employee().tap {
+            id = 1
+            firstName = "norman"
+            lastName = "lewis"
+            age = 28
+        }
 
-        assert employee.toString() == "Employee(norman, lewis, 28)"
+        then:
+        employee.toString() == "Employee(norman, lewis, 28)"
     }
 
-    void testTupleConstructorAnnotation() {
+    def "testTupleConstructorAnnotation"() {
+        when:
         Employee norman = new Employee(1, "norman", "lewis", 28)
-        assert norman.toString() == "Employee(norman, lewis, 28)"
-
         Employee snape = new Employee(2, "snape")
-        assert snape.toString() == "Employee(snape, null, 0)"
 
+        then:
+        norman.toString() == "Employee(norman, lewis, 28)"
+        snape.toString() == "Employee(snape, null, 0)"
     }
-    
-    void testEqualsAndHashCodeAnnotation() {
+
+    def "testEqualsAndHashCodeAnnotation"() {
+        when:
         Employee norman = new Employee(1, "norman", "lewis", 28)
         Employee normanCopy = new Employee(1, "norman", "lewis", 28)
-        assert norman.equals(normanCopy)
-        assert norman.hashCode() == normanCopy.hashCode()
-    }
-    
-    void testAutoCloneAnnotation() {
-        try {
-            Employee norman = new Employee(1, "norman", "lewis", 28)
-            def normanCopy = norman.clone()
-            assert norman == normanCopy
-        } catch(CloneNotSupportedException e) {
-            e.printStackTrace()
-        }
+
+        then:
+        norman == normanCopy
+        norman.hashCode() == normanCopy.hashCode()
+    }
+
+    def "testAutoCloneAnnotation"() {
+        given:
+        Employee norman = new Employee(1, "norman", "lewis", 28)
+
+        when:
+        def normanCopy = norman.clone()
+
+        then:
+        norman == normanCopy
     }
 
-    void testLoggingAnnotation() {
+    def "testLoggingAnnotation"() {
+        given:
         Employee employee = new Employee(1, "Norman", "Lewis", 28)
-        employee.logEmp()
+        employee.logEmp() // INFO: Employee: Lewis, Norman is of 28 years age
     }
 }

core-groovy-modules/core-groovy-2/src/test/groovy/com/baeldung/templateengine/TemplateEnginesUnitTest.groovy

 package com.baeldung.templateengine
 
+import groovy.text.GStringTemplateEngine
 import groovy.text.SimpleTemplateEngine
 import groovy.text.StreamingTemplateEngine
-import groovy.text.GStringTemplateEngine
-import groovy.text.XmlTemplateEngine
 import groovy.text.XmlTemplateEngine
 import groovy.text.markup.MarkupTemplateEngine
 import groovy.text.markup.TemplateConfiguration
+import spock.lang.Specification
 
-class TemplateEnginesUnitTest extends GroovyTestCase {
-    
-    def bindMap = [user: "Norman", signature: "Baeldung"]
-    
-    void testSimpleTemplateEngine() {
+class TemplateEnginesUnitTest extends Specification {
+
+    final Map BIND_MAP = [user: "Norman", signature: "Baeldung"]
+
+    def "testSimpleTemplateEngine"() {
+        given:
         def smsTemplate = 'Dear <% print user %>, Thanks for reading our Article. ${signature}'
-        def smsText = new SimpleTemplateEngine().createTemplate(smsTemplate).make(bindMap)
 
-        assert smsText.toString() == "Dear Norman, Thanks for reading our Article. Baeldung"
+        when:
+        def smsText = new SimpleTemplateEngine().createTemplate(smsTemplate).make(BIND_MAP)
+
+        then:
+        smsText.toString() == "Dear Norman, Thanks for reading our Article. Baeldung"
     }
-    
-    void testStreamingTemplateEngine() {
+
+    def "testStreamingTemplateEngine"() {
+        given:
         def articleEmailTemplate = new File('src/main/resources/articleEmail.template')
-        bindMap.articleText = """1. Overview
-This is a tutorial article on Template Engines""" //can be a string larger than 64k
-        
-        def articleEmailText = new StreamingTemplateEngine().createTemplate(articleEmailTemplate).make(bindMap)
-        
-        assert articleEmailText.toString() == """Dear Norman,
-Please read the requested article below.
-1. Overview
-This is a tutorial article on Template Engines
-From,
-Baeldung"""
-        
+        //can be a string larger than 64k
+        BIND_MAP.articleText = """|1. Overview
+                                  |This is a tutorial article on Template Engines""".stripMargin()
+
+        when:
+        def articleEmailText = new StreamingTemplateEngine().createTemplate(articleEmailTemplate).make(BIND_MAP)
+
+        then:
+        articleEmailText.toString() == """|Dear Norman,
+                                          |Please read the requested article below.
+                                          |1. Overview
+                                          |This is a tutorial article on Template Engines
+                                          |From,
+                                          |Baeldung""".stripMargin()
     }
-    
-    void testGStringTemplateEngine() {
+
+    def "testGStringTemplateEngine"() {
+        given:
         def emailTemplate = new File('src/main/resources/email.template')
-        def emailText = new GStringTemplateEngine().createTemplate(emailTemplate).make(bindMap)
-        
-        assert emailText.toString() == "Dear Norman,\nThanks for subscribing our services.\nBaeldung"
+
+        when:
+        def emailText = new GStringTemplateEngine().createTemplate(emailTemplate).make(BIND_MAP)
+
+        then:
+        emailText.toString() == """|Dear Norman,
+                                   |Thanks for subscribing our services.
+                                   |Baeldung""".stripMargin()
     }
-    
-    void testXmlTemplateEngine() {
+
+    def "testXmlTemplateEngine"() {
+        given:
         def emailXmlTemplate = '''<xs xmlns:gsp='groovy-server-pages'>
                                       <gsp:scriptlet>def emailContent = "Thanks for subscribing our services."</gsp:scriptlet>
                                       <email>
@@ -51,11 +65,16 @@ Baeldung"""
                                           <signature>${signature}</signature>
                                       </email>
                                   </xs>'''
-        def emailXml = new XmlTemplateEngine().createTemplate(emailXmlTemplate).make(bindMap)
+
+        when:
+        def emailXml = new XmlTemplateEngine().createTemplate(emailXmlTemplate).make(BIND_MAP)
+
+        then:
         println emailXml.toString()
     }
-    
-    void testMarkupTemplateEngineHtml() {
+
+    def "testMarkupTemplateEngineHtml"() {
+        given:
         def emailHtmlTemplate = """html {
                                        head {
                                            title('Service Subscription Email')
@@ -66,14 +85,16 @@ Baeldung"""
                                            p('Baeldung')
                                        }
                                    }"""
-        
-        
+
+        when:
         def emailHtml = new MarkupTemplateEngine().createTemplate(emailHtmlTemplate).make()
+
+        then:
         println emailHtml.toString()
-        
     }
-    
-    void testMarkupTemplateEngineXml() {
+
+    def "testMarkupTemplateEngineXml"() {
+        given:
         def emailXmlTemplate = """xmlDeclaration()  
                                       xs{
                                           email {
@@ -83,14 +104,18 @@ Baeldung"""
                                           }  
                                       }
                                """
-        TemplateConfiguration config = new TemplateConfiguration()
-        config.autoIndent = true
-        config.autoEscape = true
-        config.autoNewLine = true
+        TemplateConfiguration config = new TemplateConfiguration().with {
+            autoIndent = true
+            autoEscape = true
+            autoNewLine = true
 
+            return it
+        }
+
+        when:
         def emailXml = new MarkupTemplateEngine(config).createTemplate(emailXmlTemplate).make()
-        
+
+        then:
         println emailXml.toString()
     }
-    
-}
\ No newline at end of file
+}