modifieds example to creates less cognitive load for a reader (#8018)

spring-boot-di/src/main/java/com/baeldung/componentscan/filter/aspectj/ComponentScanAspectJFilterApp.java

@@ -5,10 +5,10 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.FilterType;
 
 @Configuration
-@ComponentScan(includeFilters = @ComponentScan.Filter(type = FilterType.ASPECTJ, 
+@ComponentScan(includeFilters = @ComponentScan.Filter(type = FilterType.ASPECTJ,
-pattern = "com.baeldung.componentscan.filter.aspectj.* " 
+        pattern = "com.baeldung.componentscan.filter.aspectj.* "
-            + "&& !(com.baeldung.componentscan.filter.aspectj.L* " 
+                + "&& !(com.baeldung.componentscan.filter.aspectj.L* "
-            + "|| com.baeldung.componentscan.filter.aspectj.C*)"))
+                + "|| com.baeldung.componentscan.filter.aspectj.C*)"))
 public class ComponentScanAspectJFilterApp {
     public static void main(String[] args) {
     }

spring-boot-di/src/main/java/com/baeldung/componentscan/filter/custom/Cat.java

@@ -1,4 +1,4 @@
 package com.baeldung.componentscan.filter.custom;
 
-public class Cat extends Pet {
+public class Cat {
 }

spring-boot-di/src/main/java/com/baeldung/componentscan/filter/custom/ComponentScanCustomFilter.java

@@ -12,11 +12,8 @@ public class ComponentScanCustomFilter implements TypeFilter {
     @Override
     public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory) throws IOException {
         ClassMetadata classMetadata = metadataReader.getClassMetadata();
-        String superClass = classMetadata.getSuperClassName();
+        String fullyQualifiedName = classMetadata.getClassName();
-        if (Pet.class.getName()
+        String className = fullyQualifiedName.substring(fullyQualifiedName.lastIndexOf(".") + 1);
-            .equalsIgnoreCase(superClass)) {
+        return className.length() > 5 ? true : false;
-            return true;
-        }
-        return false;
     }
 }

spring-boot-di/src/main/java/com/baeldung/componentscan/filter/custom/Elephant.java

@@ -1,4 +1,4 @@
 package com.baeldung.componentscan.filter.custom;
 
-public class Pet {
+public class Elephant {
 }

spring-boot-di/src/main/java/com/baeldung/componentscan/filter/regex/ComponentScanRegexFilterApp.java

@@ -5,7 +5,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.FilterType;
 
 @Configuration
-@ComponentScan(includeFilters = @ComponentScan.Filter(type = FilterType.REGEX, pattern = ".*[t]"))
+@ComponentScan(includeFilters = @ComponentScan.Filter(type = FilterType.REGEX, pattern = ".*(nt)"))
 public class ComponentScanRegexFilterApp {
 
     public static void main(String[] args) {

spring-boot-di/src/test/java/com/baeldung/componentscan/filter/custom/ComponentScanCustomFilterAppIntegrationTest.java

@@ -1,18 +1,18 @@
 package com.baeldung.componentscan.filter.custom;
 
-import static org.junit.Assert.assertThat;
-
-import java.util.Arrays;
-import java.util.List;
-import java.util.stream.Collectors;
-
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.test.context.junit4.SpringRunner;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
 import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.assertThat;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = ComponentScanCustomFilterApp.class)
@@ -22,9 +22,10 @@ public class ComponentScanCustomFilterAppIntegrationTest {
     public void whenCustomFilterIsUsed_thenComponentScanShouldRegisterBeanMatchingCustomFilter() {
         ApplicationContext applicationContext = new AnnotationConfigApplicationContext(ComponentScanCustomFilterApp.class);
         List<String> beans = Arrays.stream(applicationContext.getBeanDefinitionNames())
-            .filter(bean -> !bean.contains("org.springframework") && !bean.contains("componentScanCustomFilterApp"))
+                .filter(bean -> !bean.contains("org.springframework") && !bean.contains("componentScanCustomFilterApp")
-            .collect(Collectors.toList());
+                        && !bean.contains("componentScanCustomFilter"))
+                .collect(Collectors.toList());
         assertThat(beans.size(), equalTo(1));
-        assertThat(beans.get(0), equalTo("cat"));
+        assertThat(beans.get(0), equalTo("elephant"));
     }
 }

spring-boot-di/src/test/java/com/baeldung/componentscan/filter/regex/ComponentScanRegexFilterAppIntegrationTest.java

@@ -24,8 +24,7 @@ public class ComponentScanRegexFilterAppIntegrationTest {
         List<String> beans = Arrays.stream(applicationContext.getBeanDefinitionNames())
             .filter(bean -> !bean.contains("org.springframework") && !bean.contains("componentScanRegexFilterApp"))
             .collect(Collectors.toList());
-        assertThat(beans.size(), equalTo(2));
+        assertThat(beans.size(), equalTo(1));
-        assertThat(beans.contains("cat"), equalTo(true));
         assertThat(beans.contains("elephant"), equalTo(true));
     }
 }