fix: code smells

src/main/java/io/vertx/openapi/contract/Operation.java

@@ -15,7 +15,6 @@
 import io.vertx.codegen.annotations.Nullable;
 import io.vertx.codegen.annotations.VertxGen;
 import io.vertx.core.http.HttpMethod;
-import io.vertx.core.json.JsonObject;
 
 import java.util.List;
 
@@ -80,6 +79,7 @@ public interface Operation extends OpenAPIObject {
 
   /**
    * Returns the applicable list of security requirements (scopes) or empty list.
+   *
    * @return The related security requirement.
    */
   List<SecurityRequirement> getSecurityRequirements();

src/main/java/io/vertx/openapi/contract/impl/OpenAPIContractImpl.java

@@ -39,6 +39,7 @@
 import static java.util.stream.Collectors.groupingBy;
 import static java.util.stream.Collectors.toList;
 import static java.util.stream.Collectors.toMap;
+import static java.util.stream.Collectors.toUnmodifiableList;
 
 public class OpenAPIContractImpl implements OpenAPIContract {
   private static final String KEY_SERVERS = "servers";
@@ -74,21 +75,17 @@ public OpenAPIContractImpl(JsonObject resolvedSpec, OpenAPIVersion version, Sche
     this.version = version;
     this.schemaRepository = schemaRepository;
 
-    servers = unmodifiableList(
-      resolvedSpec
-        .getJsonArray(KEY_SERVERS, EMPTY_JSON_ARRAY)
-        .stream()
-        .map(JsonObject.class::cast)
-        .map(ServerImpl::new)
-        .collect(toList()));
+    servers = resolvedSpec
+      .getJsonArray(KEY_SERVERS, EMPTY_JSON_ARRAY)
+      .stream()
+      .map(JsonObject.class::cast)
+      .map(ServerImpl::new).collect(toUnmodifiableList());
 
-    this.securityRequirements = unmodifiableList(
-      resolvedSpec
-        .getJsonArray(KEY_SECURITY, EMPTY_JSON_ARRAY)
-        .stream()
-        .map(JsonObject.class::cast)
-        .map(SecurityRequirementImpl::new)
-        .collect(toList()));
+    this.securityRequirements = resolvedSpec
+      .getJsonArray(KEY_SECURITY, EMPTY_JSON_ARRAY)
+      .stream()
+      .map(JsonObject.class::cast)
+      .map(SecurityRequirementImpl::new).collect(toUnmodifiableList());
 
     if (servers.stream().collect(groupingBy(Server::getBasePath)).size() > 1) {
       throw createUnsupportedFeature("Different base paths in server urls");
@@ -182,7 +179,7 @@ public String basePath() {
 
   @Override
   public List<Operation> operations() {
-    return unmodifiableList(new ArrayList<>(operations.values()));
+    return List.copyOf(operations.values());
   }
 
   @Override

src/main/java/io/vertx/openapi/contract/impl/OperationImpl.java

@@ -38,8 +38,8 @@
 import static io.vertx.openapi.impl.Utils.EMPTY_JSON_OBJECT;
 import static java.util.Collections.unmodifiableList;
 import static java.util.Collections.unmodifiableMap;
-import static java.util.stream.Collectors.toList;
 import static java.util.stream.Collectors.toMap;
+import static java.util.stream.Collectors.toUnmodifiableList;
 
 public class OperationImpl implements Operation {
   private static final Logger LOG = LoggerFactory.getLogger(OperationImpl.class);
@@ -80,16 +80,14 @@ public OperationImpl(String absolutePath, String path, HttpMethod method, JsonOb
     this.extensions = unmodifiableMap(allExtensions);
 
     this.tags =
-      unmodifiableList(operationModel.getJsonArray(KEY_TAGS, EMPTY_JSON_ARRAY).stream().map(Object::toString).collect(
-        toList()));
+      operationModel.getJsonArray(KEY_TAGS, EMPTY_JSON_ARRAY).stream().map(Object::toString).collect(toUnmodifiableList());
 
     this.securityRequirements =
       operationModel.containsKey(KEY_SECURITY) ?
-        unmodifiableList(
-          operationModel.getJsonArray(KEY_SECURITY).stream()
-            .map(JsonObject.class::cast)
-            .map(SecurityRequirementImpl::new)
-            .collect(toList())) :
+        operationModel.getJsonArray(KEY_SECURITY).stream()
+          .map(JsonObject.class::cast)
+          .map(SecurityRequirementImpl::new)
+          .collect(toUnmodifiableList()) :
         globalSecReq;
 
     List<Parameter> operationParameters =

src/main/java/io/vertx/openapi/contract/impl/ResponseImpl.java

@@ -21,7 +21,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.function.Predicate;
-import java.util.stream.Collectors;
 
 import static io.netty.handler.codec.http.HttpHeaderNames.CONTENT_TYPE;
 import static io.vertx.openapi.contract.Location.HEADER;
@@ -30,10 +29,10 @@
 import static io.vertx.openapi.contract.OpenAPIContractException.createUnsupportedFeature;
 import static io.vertx.openapi.impl.Utils.EMPTY_JSON_OBJECT;
 import static java.lang.String.join;
-import static java.util.Collections.unmodifiableList;
 import static java.util.Collections.unmodifiableMap;
 import static java.util.function.Function.identity;
 import static java.util.stream.Collectors.toMap;
+import static java.util.stream.Collectors.toUnmodifiableList;
 
 public class ResponseImpl implements Response {
   private static final String KEY_HEADERS = "headers";
@@ -51,18 +50,16 @@ public ResponseImpl(JsonObject responseModel, String operationId) {
     this.responseModel = responseModel;
 
     JsonObject headersObject = responseModel.getJsonObject(KEY_HEADERS, EMPTY_JSON_OBJECT);
-    this.headers = unmodifiableList(
-      headersObject
-        .fieldNames()
-        .stream()
-        .filter(JsonSchema.EXCLUDE_ANNOTATIONS)
-        .filter(FILTER_CONTENT_TYPE)
-        .map(name -> {
-          JsonObject headerModel = headersObject.getJsonObject(name).copy().put("name", name).put("in",
-            HEADER.toString());
-          return new ParameterImpl("", headerModel);
-        })
-        .collect(Collectors.toList()));
+    this.headers = headersObject
+      .fieldNames()
+      .stream()
+      .filter(JsonSchema.EXCLUDE_ANNOTATIONS)
+      .filter(FILTER_CONTENT_TYPE)
+      .map(name -> {
+        JsonObject headerModel = headersObject.getJsonObject(name).copy().put("name", name).put("in",
+          HEADER.toString());
+        return new ParameterImpl("", headerModel);
+      }).collect(toUnmodifiableList());
 
     JsonObject contentObject = responseModel.getJsonObject(KEY_CONTENT, EMPTY_JSON_OBJECT);
     this.content = unmodifiableMap(

src/main/java/io/vertx/openapi/contract/impl/SecurityRequirementImpl.java

@@ -22,31 +22,29 @@
 import java.util.stream.Collectors;
 
 import static io.vertx.openapi.impl.Utils.EMPTY_JSON_ARRAY;
-import static java.util.Collections.*;
+import static java.util.Collections.emptyMap;
+import static java.util.Collections.emptySet;
+import static java.util.Collections.unmodifiableMap;
 import static java.util.function.Function.identity;
 import static java.util.stream.Collectors.toList;
+import static java.util.stream.Collectors.toUnmodifiableSet;
 
 public class SecurityRequirementImpl implements SecurityRequirement {
-
   private final JsonObject securityRequirementModel;
   private final Set<String> names;
   private final Map<String, List<String>> scopes;
-  private final boolean empty;
 
   public SecurityRequirementImpl(JsonObject securityRequirementModel) {
     this.securityRequirementModel = securityRequirementModel;
-    this.empty = securityRequirementModel.isEmpty();
 
     if (securityRequirementModel.isEmpty()) {
       this.names = emptySet();
       this.scopes = emptyMap();
     } else {
-      this.names = unmodifiableSet(
-        securityRequirementModel
-          .fieldNames()
-          .stream()
-          .filter(JsonSchema.EXCLUDE_ANNOTATIONS)
-          .collect(Collectors.toSet()));
+      this.names = securityRequirementModel
+        .fieldNames()
+        .stream()
+        .filter(JsonSchema.EXCLUDE_ANNOTATIONS).collect(toUnmodifiableSet());
 
       this.scopes = unmodifiableMap(
         this.names

src/main/java/io/vertx/openapi/validation/RequestUtils.java

@@ -65,7 +65,7 @@ public static Future<ValidatableRequest> extract(HttpServerRequest request, Oper
    * @return A {@link Future} holding the ValidatableRequest.
    */
   public static Future<ValidatableRequest> extract(HttpServerRequest request, Operation operation,
-    Supplier<Future<Buffer>> bodySupplier) {
+                                                   Supplier<Future<Buffer>> bodySupplier) {
     Map<String, RequestParameter> cookies = new HashMap<>();
     Map<String, RequestParameter> headers = new HashMap<>();
     Map<String, RequestParameter> pathParams = new HashMap<>();
@@ -137,7 +137,7 @@ private static RequestParameter extractQuery(HttpServerRequest request, Paramete
   }
 
   private static RequestParameter joinFormValues(Collection<String> formValues, Parameter parameter,
-    Supplier<RequestParameter> explodedObjectSupplier) {
+                                                 Supplier<RequestParameter> explodedObjectSupplier) {
     if (formValues.isEmpty()) {
       return EMPTY;
     }
@@ -170,7 +170,7 @@ public static int findPathSegment(String templatePath, String parameterName) {
 
   static String decodeUrl(String encoded) {
     try {
-      return encoded == null ? null : URLDecoder.decode(encoded, StandardCharsets.UTF_8.name());
+      return encoded == null ? null : URLDecoder.decode(encoded, StandardCharsets.UTF_8);
     } catch (Exception e) {
       throw new ValidatorException("Can't decode URL value: " + encoded, ILLEGAL_VALUE, e);
     }

src/main/java/io/vertx/openapi/validation/analyser/ContentAnalyser.java

@@ -74,9 +74,9 @@ public static ContentAnalyser getContentAnalyser(MediaType mediaType, String con
     }
   }
 
-  protected String contentType;
-  protected Buffer content;
-  protected ValidationContext requestOrResponse;
+  protected final String contentType;
+  protected final Buffer content;
+  protected final ValidationContext requestOrResponse;
 
   /**
    * Creates a new content analyser.

src/main/java/io/vertx/openapi/validation/impl/ValidatedResponseImpl.java

@@ -46,7 +46,7 @@ protected static Map<String, ResponseParameter> safeUnmodifiableMap(Map<String,
         entry -> entry.getKey().toLowerCase(), Entry::getValue));
 
     return Collections.unmodifiableMap(map == null ? Collections.emptyMap() :
-      new HashMap<String, ResponseParameter>(lowerCaseHeader) {
+      new HashMap<>(lowerCaseHeader) {
         @Override
         public ResponseParameter get(Object key) {
           return super.get(key.toString().toLowerCase());

src/test/java/io/vertx/tests/MockHelper.java

@@ -12,14 +12,11 @@
 
 package io.vertx.tests;
 
-import io.vertx.core.buffer.Buffer;
 import io.vertx.json.schema.JsonSchema;
 import io.vertx.json.schema.common.dsl.SchemaType;
 import io.vertx.openapi.contract.Location;
 import io.vertx.openapi.contract.Parameter;
 import io.vertx.openapi.contract.Style;
-import io.vertx.openapi.validation.ValidatableRequest;
-import io.vertx.openapi.validation.impl.RequestParameterImpl;
 
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
@@ -30,13 +27,6 @@ private MockHelper() {
 
   }
 
-  public static ValidatableRequest mockValidatableRequest(Buffer body, String contentType) {
-    ValidatableRequest mockedRequest = mock(ValidatableRequest.class);
-    when(mockedRequest.getBody()).thenReturn(new RequestParameterImpl(body));
-    when(mockedRequest.getContentType()).thenReturn(contentType);
-    return mockedRequest;
-  }
-
   public static Parameter mockParameter(String name, Location in, Style style, boolean explode, JsonSchema schema) {
     return mockParameter(name, in, style, explode, schema, false);
   }

src/test/java/io/vertx/tests/contract/OpenAPIContractTest.java

@@ -165,7 +165,8 @@ void testValidJsonSchemaProvidedAsAdditionalSpecFiles(Vertx vertx, VertxTestCont
     JsonObject validComponents = loadJson(vertx, resourcePath.resolve("components.json"));
 
     Map<String, JsonObject> additionalValidSpecFiles = ImmutableMap.of("https://example.com/petstore", validComponents);
-    Map<String, JsonObject> additionalInvalidSpecFiles = ImmutableMap.of("https://example.com/petstore", invalidComponents);
+    Map<String, JsonObject> additionalInvalidSpecFiles = ImmutableMap.of("https://example.com/petstore",
+      invalidComponents);
 
     OpenAPIContract.from(vertx, contract.copy(), additionalValidSpecFiles)
       .compose(validResp -> Future.succeededFuture(validResp.getRawContract()))
@@ -185,7 +186,8 @@ void testMalformedJsonSchemaProvidedAsAdditionalSpecFiles(Vertx vertx, VertxTest
     JsonObject contract = loadJson(vertx, resourcePath.resolve("petstore.json"));
     JsonObject malformedComponents = loadJson(vertx, resourcePath.resolve("malformedComponents.json"));
 
-    Map<String, JsonObject> additionalMalformedSpecFiles = ImmutableMap.of("https://example.com/petstore", malformedComponents);
+    Map<String, JsonObject> additionalMalformedSpecFiles = ImmutableMap.of("https://example.com/petstore",
+      malformedComponents);
 
     OpenAPIContract.from(vertx, contract.copy(), additionalMalformedSpecFiles)
       .onComplete(handler -> testContext.verify(() -> {
@@ -208,12 +210,10 @@ public void testAdditionalSchemaFiles(Vertx vertx, VertxTestContext testContext)
 
     Map<String, String> additionalSpecFiles = ImmutableMap.of("https://schemas/Name.yaml", componentsPath.toString());
     OpenAPIContract.from(vertx, contractPath.toString(), additionalSpecFiles)
-      .onComplete(testContext.succeeding(c -> {
-        testContext.verify(() -> {
-          assertThat(c.getRawContract().toString()).isEqualTo(dereferenced.toString());
-          testContext.completeNow();
-        });
-      }));
+      .onComplete(testContext.succeeding(c -> testContext.verify(() -> {
+        assertThat(c.getRawContract().toString()).isEqualTo(dereferenced.toString());
+        testContext.completeNow();
+      })));
   }
 
 }

src/test/java/io/vertx/tests/contract/OpenAPIVersionTest.java

@@ -23,7 +23,6 @@
 import io.vertx.junit5.VertxTestContext;
 import io.vertx.openapi.contract.OpenAPIContractException;
 import io.vertx.openapi.contract.OpenAPIVersion;
-import io.vertx.tests.ResourceHelper;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
@@ -40,10 +39,10 @@
 import java.util.stream.Stream;
 
 import static com.google.common.truth.Truth.assertThat;
-import static io.vertx.tests.ResourceHelper.TEST_RESOURCE_PATH;
-import static io.vertx.openapi.impl.Utils.EMPTY_JSON_OBJECT;
 import static io.vertx.openapi.contract.OpenAPIVersion.V3_0;
 import static io.vertx.openapi.contract.OpenAPIVersion.V3_1;
+import static io.vertx.openapi.impl.Utils.EMPTY_JSON_OBJECT;
+import static io.vertx.tests.ResourceHelper.TEST_RESOURCE_PATH;
 import static io.vertx.tests.ResourceHelper.getRelatedTestResourcePath;
 import static io.vertx.tests.ResourceHelper.loadJson;
 import static java.util.concurrent.TimeUnit.SECONDS;
@@ -91,7 +90,7 @@ void validateContractTest(OpenAPIVersion version, Path contractFile, Vertx vertx
   @MethodSource(value = "provideVersionAndInvalidSpec")
   @Timeout(value = 2, timeUnit = SECONDS)
   void validateContractTestError(OpenAPIVersion version, Path contractFile, Consumer<OutputUnit> validator, Vertx vertx,
-                         VertxTestContext testContext) {
+                                 VertxTestContext testContext) {
     JsonObject contract = vertx.fileSystem().readFileBlocking(contractFile.toString()).toJsonObject();
     version.getRepository(vertx, DUMMY_BASE_URI).compose(repo -> version.validateContract(vertx, repo, contract))
       .onComplete(testContext.succeeding(res -> {
@@ -139,7 +138,8 @@ void testFromSpec(OpenAPIVersion version, Path specFile, Vertx vertx) {
   @DisplayName("fromSpec should throw exception if field openapi doesn't exist or the version isn't supported")
   void testFromSpecException() {
     String expectedInvalidMsg = "The passed OpenAPI contract is invalid: Field \"openapi\" is missing";
-    Assertions.assertThrows(OpenAPIContractException.class, () -> OpenAPIVersion.fromContract(null), expectedInvalidMsg);
+    Assertions.assertThrows(OpenAPIContractException.class, () -> OpenAPIVersion.fromContract(null),
+      expectedInvalidMsg);
     assertThrows(OpenAPIContractException.class, () -> OpenAPIVersion.fromContract(EMPTY_JSON_OBJECT),
       expectedInvalidMsg);
 
@@ -148,6 +148,7 @@ void testFromSpecException() {
     assertThrows(OpenAPIContractException.class, () -> OpenAPIVersion.fromContract(unsupportedContract),
       expectedUnsupportedMsg);
   }
+
   @ParameterizedTest(name = "{index} should be able to validate additional files against the json schema for {0}")
   @EnumSource(OpenAPIVersion.class)
   @Timeout(value = 2, timeUnit = SECONDS)
@@ -158,15 +159,15 @@ public void testValidationOfAdditionalSchemaFiles(OpenAPIVersion version, Vertx
 
 
     version.getRepository(vertx, "https://vertx.io")
-        .onSuccess(repository -> version.validateAdditionalContractFile(vertx, repository, validJsonSchema)
-          .onFailure(testContext::failNow)
-          .onSuccess(ignored -> version.validateAdditionalContractFile(vertx, repository, malformedJsonSchema)
-            .onComplete(handler -> testContext.verify(() -> {
-              assertThat(handler.failed()).isTrue();
-              assertThat(handler.cause()).isInstanceOf(JsonSchemaValidationException.class);
-              assertThat(handler.cause()).hasMessageThat().isEqualTo("-1 is less than 0");
-              testContext.completeNow();
-            }))));
+      .onSuccess(repository -> version.validateAdditionalContractFile(vertx, repository, validJsonSchema)
+        .onFailure(testContext::failNow)
+        .onSuccess(ignored -> version.validateAdditionalContractFile(vertx, repository, malformedJsonSchema)
+          .onComplete(handler -> testContext.verify(() -> {
+            assertThat(handler.failed()).isTrue();
+            assertThat(handler.cause()).isInstanceOf(JsonSchemaValidationException.class);
+            assertThat(handler.cause()).hasMessageThat().isEqualTo("-1 is less than 0");
+            testContext.completeNow();
+          }))));
   }
 
 }

src/test/java/io/vertx/tests/validation/RequestValidatorTest.java

@@ -19,7 +19,6 @@
 import io.vertx.openapi.validation.impl.RequestValidatorImpl;
 import org.junit.jupiter.api.Test;
 
-import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 

src/test/java/io/vertx/tests/validation/ResponseValidatorTest.java

@@ -19,7 +19,6 @@
 import io.vertx.openapi.validation.impl.ResponseValidatorImpl;
 import org.junit.jupiter.api.Test;
 
-import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 

src/test/java/io/vertx/tests/validation/analyser/ApplicationJsonAnalyserTest.java

@@ -41,7 +41,7 @@ void testCheckSyntacticalCorrectnessThrows() {
     ApplicationJsonAnalyser analyser = new ApplicationJsonAnalyser(APPLICATION_JSON.toString(), Buffer.buffer(
       "\"foobar"), REQUEST);
 
-    ValidatorException exception = assertThrows(ValidatorException.class, () -> analyser.checkSyntacticalCorrectness());
+    ValidatorException exception = assertThrows(ValidatorException.class, analyser::checkSyntacticalCorrectness);
     String expectedMsg = "The request body can't be decoded";
     assertThat(exception.type()).isEqualTo(ILLEGAL_VALUE);
     assertThat(exception).hasMessageThat().isEqualTo(expectedMsg);