fix: ErrorHandling and LocalDateTime json serialization

build.gradle.kts

@@ -35,6 +35,7 @@ val micrometerVersion = "1.4.1"
 dependencies {
 	implementation("org.springframework.boot:spring-boot-starter")
 	implementation("org.springframework.boot:spring-boot-starter-web")
+  implementation("org.springframework.boot:spring-boot-starter-validation")
 	implementation("org.springframework.boot:spring-boot-starter-actuator")
 	implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:$springDocOpenApiVersion")
 	implementation("io.micrometer:micrometer-tracing-bridge-otel:$micrometerVersion")
@@ -44,6 +45,7 @@ dependencies {
 
 	compileOnly("org.projectlombok:lombok")
 	annotationProcessor("org.projectlombok:lombok")
+  testAnnotationProcessor("org.projectlombok:lombok")
 
 	//	Testing
 	testImplementation("org.springframework.boot:spring-boot-starter-test")

gradle.lockfile

@@ -12,6 +12,7 @@ com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.18.2=compileClasspath
 com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.18.2=compileClasspath
 com.fasterxml.jackson.module:jackson-module-parameter-names:2.18.2=compileClasspath
 com.fasterxml.jackson:jackson-bom:2.18.2=compileClasspath
+com.fasterxml:classmate:1.7.0=compileClasspath
 io.micrometer:context-propagation:1.1.2=compileClasspath
 io.micrometer:micrometer-commons:1.14.2=compileClasspath
 io.micrometer:micrometer-core:1.14.2=compileClasspath
@@ -48,6 +49,8 @@ org.apache.logging.log4j:log4j-to-slf4j:2.24.3=compileClasspath
 org.apache.tomcat.embed:tomcat-embed-core:10.1.34=compileClasspath
 org.apache.tomcat.embed:tomcat-embed-el:10.1.34=compileClasspath
 org.apache.tomcat.embed:tomcat-embed-websocket:10.1.34=compileClasspath
+org.hibernate.validator:hibernate-validator:8.0.2.Final=compileClasspath
+org.jboss.logging:jboss-logging:3.6.1.Final=compileClasspath
 org.jspecify:jspecify:1.0.0=compileClasspath
 org.openapitools:jackson-databind-nullable:0.2.6=compileClasspath
 org.projectlombok:lombok:1.18.36=compileClasspath
@@ -63,6 +66,7 @@ org.springframework.boot:spring-boot-starter-actuator:3.4.1=compileClasspath
 org.springframework.boot:spring-boot-starter-json:3.4.1=compileClasspath
 org.springframework.boot:spring-boot-starter-logging:3.4.1=compileClasspath
 org.springframework.boot:spring-boot-starter-tomcat:3.4.1=compileClasspath
+org.springframework.boot:spring-boot-starter-validation:3.4.1=compileClasspath
 org.springframework.boot:spring-boot-starter-web:3.4.1=compileClasspath
 org.springframework.boot:spring-boot-starter:3.4.1=compileClasspath
 org.springframework.boot:spring-boot:3.4.1=compileClasspath

openapi/template-payments-java-repository.openapi.yaml

@@ -29,3 +29,18 @@ paths:
                   error:
                     type: string
                     example: "Internal Server Error"
+components:
+  schemas:
+    ErrorDTO:
+      type: object
+      required:
+        - code
+        - message
+      properties:
+        code:
+          type: string
+          enum:
+            - BAD_REQUEST
+            - GENERIC_ERROR
+        message:
+          type: string

src/main/java/it/gov/pagopa/template/config/json/JsonConfig.java

@@ -0,0 +1,49 @@
+package it.gov.pagopa.template.config.json;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.time.LocalDateTime;
+import java.util.TimeZone;
+
+@Configuration
+public class JsonConfig {
+
+  @Bean
+  public ObjectMapper objectMapper() {
+    ObjectMapper mapper = new ObjectMapper();
+    mapper.registerModule(configureDateTimeModule());
+    mapper.registerModule(new Jdk8Module());
+    mapper.registerModule(new ParameterNamesModule(JsonCreator.Mode.DEFAULT));
+    mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
+    mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
+    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE);
+    mapper.setVisibility(PropertyAccessor.GETTER, JsonAutoDetect.Visibility.PUBLIC_ONLY);
+    mapper.setVisibility(PropertyAccessor.IS_GETTER, JsonAutoDetect.Visibility.PUBLIC_ONLY);
+    mapper.setVisibility(PropertyAccessor.SETTER, JsonAutoDetect.Visibility.PUBLIC_ONLY);
+    mapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
+    mapper.setVisibility(PropertyAccessor.CREATOR, JsonAutoDetect.Visibility.ANY);
+    mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+    mapper.setTimeZone(TimeZone.getDefault());
+    return mapper;
+  }
+
+  /** openApi is documenting LocalDateTime as date-time, which is interpreted as an OffsetDateTime by openApiGenerator */
+  private static SimpleModule configureDateTimeModule() {
+    return new JavaTimeModule()
+      .addSerializer(LocalDateTime.class, new LocalDateTimeToOffsetDateTimeSerializer())
+      .addDeserializer(LocalDateTime.class, new OffsetDateTimeToLocalDateTimeDeserializer());
+  }
+}

src/main/java/it/gov/pagopa/template/config/json/LocalDateTimeToOffsetDateTimeSerializer.java

@@ -0,0 +1,24 @@
+package it.gov.pagopa.template.config.json;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import org.springframework.context.annotation.Configuration;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
+import java.time.ZoneId;
+
+@Configuration
+public class LocalDateTimeToOffsetDateTimeSerializer extends JsonSerializer<LocalDateTime> {
+
+  @Override
+  public void serialize(LocalDateTime value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
+    if (value != null) {
+      OffsetDateTime offsetDateTime = value.atZone(ZoneId.systemDefault()).toOffsetDateTime();
+      gen.writeString(offsetDateTime.toString());
+    }
+  }
+}
+

src/main/java/it/gov/pagopa/template/config/json/OffsetDateTimeToLocalDateTimeDeserializer.java

@@ -0,0 +1,27 @@
+package it.gov.pagopa.template.config.json;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import org.springframework.context.annotation.Configuration;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
+
+
+@Configuration
+public class OffsetDateTimeToLocalDateTimeDeserializer extends JsonDeserializer<LocalDateTime> {
+
+  @Override
+  public LocalDateTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
+
+    String dateString = p.getValueAsString();
+    if(dateString.contains("+")){
+      return OffsetDateTime.parse(dateString).toLocalDateTime();
+    } else {
+      return LocalDateTime.parse(dateString);
+    }
+  }
+}
+

src/main/java/it/gov/pagopa/template/exception/ControllerExceptionHandler.java

@@ -0,0 +1,96 @@
+package it.gov.pagopa.template.exception;
+
+import com.fasterxml.jackson.databind.JsonMappingException;
+import it.gov.pagopa.template.dto.generated.ErrorDTO;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.validation.ValidationException;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.HttpStatusCode;
+import org.springframework.http.ResponseEntity;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.validation.FieldError;
+import org.springframework.web.ErrorResponse;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+import java.util.stream.Collectors;
+
+@RestControllerAdvice
+@Slf4j
+@Order(Ordered.HIGHEST_PRECEDENCE)
+public class ControllerExceptionHandler {
+
+  @ExceptionHandler({ValidationException.class, HttpMessageNotReadableException.class, MethodArgumentNotValidException.class})
+  public ResponseEntity<ErrorDTO> handleViolationException(Exception ex, HttpServletRequest request) {
+    return handleException(ex, request, HttpStatus.BAD_REQUEST, ErrorDTO.CodeEnum.BAD_REQUEST);
+  }
+
+  @ExceptionHandler({ServletException.class})
+  public ResponseEntity<ErrorDTO> handleServletException(ServletException ex, HttpServletRequest request) {
+    HttpStatusCode httpStatus = HttpStatus.INTERNAL_SERVER_ERROR;
+    ErrorDTO.CodeEnum errorCode = ErrorDTO.CodeEnum.GENERIC_ERROR;
+    if (ex instanceof ErrorResponse errorResponse) {
+      httpStatus = errorResponse.getStatusCode();
+      if (httpStatus.is4xxClientError()) {
+        errorCode = ErrorDTO.CodeEnum.BAD_REQUEST;
+      }
+    }
+    return handleException(ex, request, httpStatus, errorCode);
+  }
+
+  @ExceptionHandler({RuntimeException.class})
+  public ResponseEntity<ErrorDTO> handleRuntimeException(RuntimeException ex, HttpServletRequest request) {
+    return handleException(ex, request, HttpStatus.INTERNAL_SERVER_ERROR, ErrorDTO.CodeEnum.GENERIC_ERROR);
+  }
+
+  static ResponseEntity<ErrorDTO> handleException(Exception ex, HttpServletRequest request, HttpStatusCode httpStatus, ErrorDTO.CodeEnum errorEnum) {
+    logException(ex, request, httpStatus);
+
+    String message = buildReturnedMessage(ex);
+
+    return ResponseEntity
+      .status(httpStatus)
+      .body(new ErrorDTO(errorEnum, message));
+  }
+
+  private static void logException(Exception ex, HttpServletRequest request, HttpStatusCode httpStatus) {
+    log.info("A {} occurred handling request {}: HttpStatus {} - {}",
+      ex.getClass(),
+      getRequestDetails(request),
+      httpStatus.value(),
+      ex.getMessage());
+  }
+
+  private static String buildReturnedMessage(Exception ex) {
+    if (ex instanceof HttpMessageNotReadableException) {
+      if(ex.getCause() instanceof JsonMappingException jsonMappingException){
+        return "Cannot parse body: " +
+          jsonMappingException.getPath().stream()
+            .map(JsonMappingException.Reference::getFieldName)
+            .collect(Collectors.joining(".")) +
+          ": " + jsonMappingException.getOriginalMessage();
+      }
+      return "Required request body is missing";
+    } else if (ex instanceof MethodArgumentNotValidException methodArgumentNotValidException) {
+      return "Invalid request content:" +
+        methodArgumentNotValidException.getBindingResult()
+          .getAllErrors().stream()
+          .map(e -> " " +
+            (e instanceof FieldError fieldError? fieldError.getField(): e.getObjectName()) +
+            ": " + e.getDefaultMessage())
+          .sorted()
+          .collect(Collectors.joining(";"));
+    } else {
+      return ex.getMessage();
+    }
+  }
+
+  static String getRequestDetails(HttpServletRequest request) {
+    return "%s %s".formatted(request.getMethod(), request.getRequestURI());
+  }
+}

src/test/java/it/gov/pagopa/template/config/json/LocalDateTimeToOffsetDateTimeSerializerTest.java

@@ -0,0 +1,51 @@
+package it.gov.pagopa.template.config.json;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.util.TimeZone;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoInteractions;
+
+@ExtendWith(MockitoExtension.class)
+class LocalDateTimeToOffsetDateTimeSerializerTest {
+
+  @Mock
+  private JsonGenerator jsonGenerator;
+
+  @Mock
+  private SerializerProvider serializerProvider;
+
+  private LocalDateTimeToOffsetDateTimeSerializer dateTimeSerializer;
+
+  @BeforeEach
+  public void setUp() {
+    dateTimeSerializer = new LocalDateTimeToOffsetDateTimeSerializer();
+  }
+
+  @Test
+  void testDateSerializer() throws IOException {
+    LocalDateTime localDateTime = LocalDateTime.of(2025, 1, 16, 9, 15, 20);
+
+    TimeZone.setDefault(TimeZone.getTimeZone("Europe/Rome"));
+
+    dateTimeSerializer.serialize(localDateTime, jsonGenerator, serializerProvider);
+
+    verify(jsonGenerator).writeString("2025-01-16T09:15:20+01:00");
+  }
+
+  @Test
+  void testNullDateSerializer() throws IOException {
+    dateTimeSerializer.serialize(null, jsonGenerator, serializerProvider);
+
+    verifyNoInteractions(jsonGenerator);
+  }
+}

src/test/java/it/gov/pagopa/template/config/json/OffsetDateTimeToLocalDateTimeDeserializerTest.java

@@ -0,0 +1,45 @@
+package it.gov.pagopa.template.config.json;
+
+import com.fasterxml.jackson.core.JsonParser;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
+
+class OffsetDateTimeToLocalDateTimeDeserializerTest {
+
+  private final OffsetDateTimeToLocalDateTimeDeserializer deserializer = new OffsetDateTimeToLocalDateTimeDeserializer();
+
+  @Test
+  void givenOffsetDateTimeWhenThenOk() throws IOException {
+    // Given
+    OffsetDateTime offsetDateTime = OffsetDateTime.now();
+    JsonParser parser = Mockito.mock(JsonParser.class);
+    Mockito.when(parser.getValueAsString())
+      .thenReturn(offsetDateTime.toString());
+
+    // When
+    LocalDateTime result = deserializer.deserialize(parser, null);
+
+    // Then
+    Assertions.assertEquals(offsetDateTime.toLocalDateTime(), result);
+  }
+
+  @Test
+  void givenLocalDateTimeWhenThenOk() throws IOException {
+    // Given
+    LocalDateTime localDateTime = LocalDateTime.now();
+    JsonParser parser = Mockito.mock(JsonParser.class);
+    Mockito.when(parser.getValueAsString())
+      .thenReturn(localDateTime.toString());
+
+    // When
+    LocalDateTime result = deserializer.deserialize(parser, null);
+
+    // Then
+    Assertions.assertEquals(localDateTime, result);
+  }
+}