fix some stuff

Guava CharMatcher/src/test/java/com/metaxiii/fr/GuavaCharMatcherTest.java

@@ -6,8 +6,9 @@
 import com.google.common.base.CharMatcher;
 import com.google.common.base.Predicate;
 import java.nio.charset.Charset;
+import java.util.Objects;
+
 import org.junit.jupiter.api.Test;
-import org.springframework.lang.NonNull;
 
 class GuavaCharMatcherTest {
 
@@ -35,7 +36,7 @@ void whenRemoveCharsNotInCharset_thenRemoved() {
     final var encoder = charset.newEncoder();
     final var inRange = new Predicate<Character>() {
       @Override
-      public boolean apply(@NonNull final Character c) {
+      public boolean apply(final Character c) {
         return encoder.canEncode(c);
       }
     };
@@ -55,7 +56,7 @@ void whenRemoveNonASCIIChars_thenRemoved() {
   @Test
   void whenRemoveSpecialCharacters_thenRemoved() {
     final var input = "H:*el.lo,}12";
-    final var matcher = CharMatcher.forPredicate(Character::isLetterOrDigit);
+    final var matcher = CharMatcher.forPredicate(c -> Objects.nonNull(c) && Character.isLetterOrDigit(c));
     final var result = matcher.retainFrom(input);
     assertEquals("Hello12", result);
   }

Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/JsonToJavaObject.java

@@ -14,7 +14,7 @@ public class JsonToJavaObject {
   public Car processAsObject(String json) throws JsonProcessingException {
     ObjectMapper objectMapper = new ObjectMapper();
     return objectMapper.readValue(json, Car.class);
-  }
+  }  
 
   public Car processAsFile(final File file) throws IOException {
     ObjectMapper objectMapper = new ObjectMapper();
@@ -23,6 +23,6 @@ public Car processAsFile(final File file) throws IOException {
 
   public Car processAsUrl(final URL url) throws IOException {
     ObjectMapper objectMapper = new ObjectMapper();
-    return objectMapper.readValue(url, Car.class);
+    return objectMapper.readValue(url.openStream(), Car.class);
   }
 }

file.txt

@@ -0,0 +1,63 @@
+[INFO] Scanning for projects...
+[INFO] 
+[INFO] -------------------< com.metaxiii.fr:jacksonmapper >--------------------
+[INFO] Building jacksonmapper 1.0-SNAPSHOT
+[INFO]   from pom.xml
+[INFO] --------------------------------[ jar ]---------------------------------
+[INFO] 
+[INFO] --- clean:3.5.0:clean (default-clean) @ jacksonmapper ---
+[INFO] Deleting /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/target
+[INFO] 
+[INFO] --- jacoco:0.8.14:prepare-agent (prepare-agent) @ jacksonmapper ---
+[INFO] argLine set to "-javaagent:/home/meta/.m2/repository/org/jacoco/org.jacoco.agent/0.8.14/org.jacoco.agent-0.8.14-runtime.jar=destfile=/mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/target/jacoco.exec"
+[INFO] 
+[INFO] --- resources:3.3.1:resources (default-resources) @ jacksonmapper ---
+[INFO] skip non existing resourceDirectory /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/resources
+[INFO] skip non existing resourceDirectory /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/resources
+[INFO] 
+[INFO] --- compiler:3.15.0:compile (default-compile) @ jacksonmapper ---
+[INFO] Recompiling the module because of changed source code.
+[INFO] Compiling 11 source files with javac [debug parameters release 17] to target/classes
+[INFO] -------------------------------------------------------------
+[ERROR] COMPILATION ERROR : 
+[INFO] -------------------------------------------------------------
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/HandlingDateFormat.java:[20,12] cannot find symbol
+  symbol:   method setCar(com.metaxiii.fr.model.Car)
+  location: variable request of type com.metaxiii.fr.model.Request
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/HandlingDateFormat.java:[21,12] cannot find symbol
+  symbol:   method setDatePurcharsed(java.util.Date)
+  location: variable request of type com.metaxiii.fr.model.Request
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/configuration/CustomCarDeserializer.java:[28,8] cannot find symbol
+  symbol:   method setColor(java.lang.String)
+  location: variable car of type com.metaxiii.fr.model.Car
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/configuration/CustomCarSerializer.java:[23,52] cannot find symbol
+  symbol:   method getType()
+  location: variable car of type com.metaxiii.fr.model.Car
+[INFO] 4 errors 
+[INFO] -------------------------------------------------------------
+[INFO] ------------------------------------------------------------------------
+[INFO] BUILD FAILURE
+[INFO] ------------------------------------------------------------------------
+[INFO] Total time:  1.253 s
+[INFO] Finished at: 2026-02-13T16:07:41+01:00
+[INFO] ------------------------------------------------------------------------
+[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.15.0:compile (default-compile) on project jacksonmapper: Compilation failure: Compilation failure: 
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/HandlingDateFormat.java:[20,12] cannot find symbol
+[ERROR]   symbol:   method setCar(com.metaxiii.fr.model.Car)
+[ERROR]   location: variable request of type com.metaxiii.fr.model.Request
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/HandlingDateFormat.java:[21,12] cannot find symbol
+[ERROR]   symbol:   method setDatePurcharsed(java.util.Date)
+[ERROR]   location: variable request of type com.metaxiii.fr.model.Request
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/configuration/CustomCarDeserializer.java:[28,8] cannot find symbol
+[ERROR]   symbol:   method setColor(java.lang.String)
+[ERROR]   location: variable car of type com.metaxiii.fr.model.Car
+[ERROR] /mnt/ssd/Lab/formations/baeldung/Intro to Jackson ObjectMapper/src/main/java/com/metaxiii/fr/conversion/configuration/CustomCarSerializer.java:[23,52] cannot find symbol
+[ERROR]   symbol:   method getType()
+[ERROR]   location: variable car of type com.metaxiii.fr.model.Car
+[ERROR] -> [Help 1]
+[ERROR] 
+[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
+[ERROR] Re-run Maven using the -X switch to enable full debug logging.
+[ERROR] 
+[ERROR] For more information about the errors and possible solutions, please read the following articles:
+[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

guava cache/src/main/java/com/metaxiii/fr/GuavaCache.java

@@ -1,23 +1,19 @@
 package com.metaxiii.fr;
 
 import com.google.common.cache.CacheLoader;
-import org.springframework.lang.NonNull;
+import lombok.Getter;
 
+@Getter
 public class GuavaCache {
 
   private final CacheLoader<String, String> loader;
 
   public GuavaCache() {
-    loader =
-      new CacheLoader<>() {
-        @Override
-        public String load(@NonNull String key) {
-          return key.toUpperCase();
-        }
-      };
-  }
-
-  public CacheLoader<String, String> getLoader() {
-    return loader;
+    loader = new CacheLoader<>() {
+      @Override
+      public String load(String key) {
+        return key.toUpperCase();
+      }
+    };
   }
 }

guava cache/src/test/java/com/metaxiii/fr/GuavaCacheTest.java

@@ -18,7 +18,6 @@
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
-import org.springframework.lang.NonNull;
 
 class GuavaCacheTest {
 
@@ -114,7 +113,7 @@ void whenNullValue_thenOptional() {
     loader =
       new CacheLoader<>() {
         @Override
-        public Optional<String> load(@NonNull String key) {
+        public Optional<String> load(String key) {
           return Optional.ofNullable(getSuffix(key));
         }
       };

hibernate-reactive/src/main/java/com/metaxiii/fr/hibernatereactive/configuration/R2DBCConfiguration.java

@@ -3,12 +3,13 @@
 import io.r2dbc.h2.H2ConnectionConfiguration;
 import io.r2dbc.h2.H2ConnectionFactory;
 import io.r2dbc.spi.ConnectionFactory;
+
+import org.jspecify.annotations.NonNull;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.data.r2dbc.config.AbstractR2dbcConfiguration;
 import org.springframework.data.r2dbc.repository.config.EnableR2dbcRepositories;
-import org.springframework.lang.NonNull;
 import org.springframework.r2dbc.connection.init.CompositeDatabasePopulator;
 import org.springframework.r2dbc.connection.init.ConnectionFactoryInitializer;
 import org.springframework.r2dbc.connection.init.ResourceDatabasePopulator;

jackson-json-view/pom.xml

@@ -17,6 +17,12 @@
     </properties>
 
     <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>

jackson-json-view/src/main/java/com/metaxiii/fr/model/User.java

@@ -10,6 +10,7 @@
 @NoArgsConstructor
 public class User {
 
+  @JsonView(value = Views.Internal.class)
   private int id;
 
   @JsonView(value = Views.Public.class)

jackson-json-view/src/test/java/com/metaxiii/fr/model/UserTest.java

@@ -6,19 +6,19 @@
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.json.JsonMapper;
 import com.fasterxml.jackson.databind.ser.BeanSerializerFactory;
 import com.fasterxml.jackson.databind.ser.SerializerFactory;
 import com.metaxiii.fr.config.MyBeanSerializerModifier;
 import java.io.IOException;
 import org.junit.jupiter.api.Test;
-import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
 
 class UserTest {
 
   @Test
   void whenUseJsonViewToSerialize_thenCorrect() throws JsonProcessingException {
     User user = new User(1, "John");
-    Jackson2ObjectMapperBuilder mapperBuilder = new Jackson2ObjectMapperBuilder();
+    final var mapperBuilder = JsonMapper.builder();
     final ObjectMapper mapper = mapperBuilder.build();
     String result = mapper.writerWithView(Views.Public.class).writeValueAsString(user);
     assertTrue(result.contains("John"));
@@ -50,7 +50,7 @@ void whenUseJsonViewToDeserialize_thenCorrect() throws IOException {
     String json = "{\"id\":1,\"name\":\"John\"}";
     ObjectMapper mapper = new ObjectMapper();
     User user = mapper.readerWithView(Views.Public.class).forType(User.class).readValue(json);
-    assertEquals(1, user.getId());
+    assertEquals(0, user.getId());
     assertEquals("John", user.getName());
   }
 
@@ -64,6 +64,6 @@ void whenUseCustomJsonViewToSerialize_thenCorrect() throws JsonProcessingExcepti
     mapper.setSerializerFactory(serializerFactory);
     String result = mapper.writerWithView(Views.Public.class).writeValueAsString(user);
     assertTrue(result.contains("JOHN"));
-    assertTrue(result.contains("1"));
+    assertFalse(result.contains("id"));
   }
 }

jpa-query-localdatetime-with-localdate/src/main/java/com/metaxiii/fr/jpaquerylocaldatetimewithlocaldate/Event.java

@@ -9,6 +9,7 @@
 
 @Entity
 @Table(name = "events")
+@SuppressWarnings("unused")
 public class Event {
 
   @Id

jpa-query-localdatetime-with-localdate/src/main/java/com/metaxiii/fr/jpaquerylocaldatetimewithlocaldate/JpaQueryLocaldatetimeWithLocaldateApplication.java

@@ -9,5 +9,4 @@ public class JpaQueryLocaldatetimeWithLocaldateApplication {
   public static void main(final String[] args) {
     SpringApplication.run(JpaQueryLocaldatetimeWithLocaldateApplication.class, args);
   }
-
 }

passing-method-parameter/src/test/java/com/metaxiii/fr/PassingMethodParameterWithInterfaceTest.java

@@ -3,7 +3,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.util.concurrent.Callable;
-import java.util.function.BiFunction;
+import java.util.function.IntBinaryOperator;
 import org.junit.jupiter.api.Test;
 
 class PassingMethodParameterWithInterfaceTest {
@@ -26,8 +26,11 @@ void itShouldPassMethodParameterWithFunction() {
     assertEquals(8, actualResult);
   }
 
-  int executeBiFunction(final BiFunction<Integer, Integer, Integer> function, final int a, final int b) {
-    return function.apply(a, b);
+  int executeBiFunction(
+      final IntBinaryOperator function,
+      final int a,
+      final int b) {
+    return function.applyAsInt(a, b);
   }
 
   @Test

springwebclient-vs-resttemplate/src/main/java/com/metaxiii/fr/controller/TweetController.java

@@ -5,16 +5,12 @@
 import java.time.Duration;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Objects;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.boot.web.server.autoconfigure.ServerProperties;
 import org.springframework.core.ParameterizedTypeReference;
-import org.springframework.http.HttpMethod;
 import org.springframework.http.MediaType;
-import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
-import org.springframework.web.client.RestTemplate;
 import org.springframework.web.reactive.function.client.WebClient;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
@@ -32,37 +28,37 @@ public TweetController(final ServerProperties serverProperties) {
   @GetMapping("/slow-service-tweets")
   public Mono<List<Tweet>> getAllTweets() {
     return Mono.just(
-      Arrays.asList(
-        new Tweet("RestTemplate rules", "@user1"),
-        new Tweet("WebClient is better", "@user2"),
-        new Tweet("OK, both are useful", "@user1")
-      )
-    ).delayElement(Duration.ofSeconds(1));
+        Arrays.asList(
+            new Tweet("RestTemplate rules", "@user1"),
+            new Tweet("WebClient is better", "@user2"),
+            new Tweet("OK, both are useful", "@user1")))
+        .delayElement(Duration.ofSeconds(1));
   }
 
   @GetMapping("/tweets-blocking")
   public Mono<List<Tweet>> getTweetsBlocking() {
     log.info("Starting BLOCKING Controller (Fixing with WebClient)!");
     return WebClient.create("http://localhost:" + serverProperties.getPort())
-      .get()
-      .uri("/slow-service-tweets")
-      .retrieve()
-      .bodyToMono(new ParameterizedTypeReference<List<Tweet>>() {})
-      .doOnNext(result -> {
-        result.forEach(tweet -> log.info(tweet.toString()));
-        log.info("Exiting Controller!");
-      });
+        .get()
+        .uri("/slow-service-tweets")
+        .retrieve()
+        .bodyToMono(new ParameterizedTypeReference<List<Tweet>>() {
+        })
+        .doOnNext(result -> {
+          result.forEach(tweet -> log.info(tweet.toString()));
+          log.info("Exiting Controller!");
+        });
   }
 
   @GetMapping(value = "/tweets-non-blocking", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
   public Flux<Tweet> getTweetsNonBlocking() {
     log.info("Starting NON-BLOCKING Controller!");
     final Flux<Tweet> tweetFlux = WebClient.create()
-      .get()
-      .uri(URI.create("http://localhost:" + serverProperties.getPort() + "/slow-service-tweets"))
-      .retrieve()
-      .bodyToFlux(Tweet.class);
-    //noinspection CallingSubscribeInNonBlockingScope
+        .get()
+        .uri(URI.create("http://localhost:" + serverProperties.getPort() + "/slow-service-tweets"))
+        .retrieve()
+        .bodyToFlux(Tweet.class);
+    // noinspection CallingSubscribeInNonBlockingScope
     tweetFlux.subscribe(tweet -> log.info(tweet.toString()));
     log.info("Exiting NON-BLOCKING Controller!");
     return tweetFlux;

string-delete-digits/src/test/java/com/metaxiii/fr/AppTest.java

@@ -15,7 +15,7 @@ class AppTest {
 
   @Test
   void whenUsingApacheCommonsLang_thenGetExpectedResult() {
-    final var updatedString = RegExUtils.replacePattern(INPUT_STRING, DIGIT_REGEX, "");
+    final var updatedString = RegExUtils.replaceAll(INPUT_STRING, DIGIT_REGEX, "");
     assertEquals(EXPECTED_STRING, updatedString);
   }