BAEL-5645 - Scanning Java Annotations at Runtime (#12511)

* BAEL-5645 - Annotation scanners using Spring context, Spring core, reflections, java reflection, and Jandex libraries are implemented

* BAEL-5645 - Library versions are incremented in pom.xml

Co-authored-by: elcimduran <elcim.duran@kboxglobal.com>

spring-boot-modules/spring-boot-libraries-2/src/test/java/com/baeldung/annotation/scanner/SampleAnnotationScannerUnitTest.java

@@ -0,0 +1,47 @@
+package com.baeldung.annotation.scanner;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.junit.Assert.*;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class SampleAnnotationScannerUnitTest {
+    @Autowired
+    private List<SampleAnnotationScanner> scannerList;
+
+    @Test
+    public void givenPackage_whenScanAnnotatedClasses_thenAnnotationValues() {
+        final List<String> annotatedClasses = scannerList.stream()
+            .filter(SampleAnnotationScanner::supportsClassScan)
+            .map(SampleAnnotationScanner::scanAnnotatedClasses)
+            .flatMap(Collection::stream)
+            .collect(Collectors.toList());
+
+        assertNotNull(annotatedClasses);
+        assertEquals(4, annotatedClasses.size());
+        annotatedClasses.forEach(annotValue -> assertEquals("SampleAnnotatedClass", annotValue));
+    }
+
+    @Test
+    public void givenPackage_whenScanAnnotatedMethods_thenAnnotationValues() {
+        final List<String> annotatedMethods = scannerList.stream()
+            .filter(SampleAnnotationScanner::supportsMethodScan)
+            .map(SampleAnnotationScanner::scanAnnotatedMethods)
+            .flatMap(Collection::stream)
+            .collect(Collectors.toList());
+
+        assertNotNull(annotatedMethods);
+        assertEquals(3, annotatedMethods.size());
+        annotatedMethods.forEach(annotValue -> assertEquals("annotatedMethod", annotValue));
+    }
+
+}