[Spring] replace MultipartFile by Resource (#18509)

* replace MultiPartFile by Resource

* fix SpringCodegenTest

* new approach: small scoped fix

* move to JDK17 workflow

* update samples

* fix formParams

.github/workflows/samples-spring-jdk17.yaml

@@ -5,12 +5,16 @@ on:
     paths:
       - samples/openapi3/client/petstore/spring-cloud-3-with-optional
       - samples/openapi3/server/petstore/springboot-3
+      - samples/server/petstore/springboot-lombok-data
+      - samples/server/petstore/springboot-lombok-tostring
+      - samples/server/petstore/springboot-file-delegate-optional
   pull_request:
     paths:
       - samples/openapi3/client/petstore/spring-cloud-3-with-optional
       - samples/openapi3/server/petstore/springboot-3
       - samples/server/petstore/springboot-lombok-data
       - samples/server/petstore/springboot-lombok-tostring
+      - samples/server/petstore/springboot-file-delegate-optional
 jobs:
   build:
     name: Build Java Spring (JDK17)
@@ -25,6 +29,7 @@ jobs:
           - samples/openapi3/server/petstore/springboot-3
           - samples/server/petstore/springboot-lombok-data
           - samples/server/petstore/springboot-lombok-tostring
+          - samples/server/petstore/springboot-file-delegate-optional
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v4

bin/configs/spring-boot-file-delegate-optional.yaml

@@ -0,0 +1,10 @@
+generatorName: spring
+outputDir: samples/server/petstore/springboot-file-delegate-optional
+inputSpec: modules/openapi-generator/src/test/resources/3_0/issue18345.yaml
+templateDir: modules/openapi-generator/src/main/resources/JavaSpring
+additionalProperties:
+  delegatePattern: true
+  useOptional: true
+  useSpringBoot3: true
+  artifactId: spring-boot-use-optional
+  hideGenerationTimestamp: "true"

modules/openapi-generator/src/main/resources/JavaSpring/apiDelegate.mustache

@@ -66,7 +66,7 @@ public interface {{classname}}Delegate {
     {{#isDeprecated}}
     @Deprecated
     {{/isDeprecated}}
-    {{#jdk8-default-interface}}default {{/jdk8-default-interface}}{{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#isArray}}List<{{/isArray}}{{#reactive}}Flux<Part>{{/reactive}}{{^reactive}}MultipartFile{{/reactive}}{{#isArray}}>{{/isArray}}{{/isFile}} {{paramName}}{{^-last}},
+    {{#jdk8-default-interface}}default {{/jdk8-default-interface}}{{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#isArray}}List<{{/isArray}}{{#reactive}}Flux<Part>{{/reactive}}{{^reactive}}{{#isFormParam}}MultipartFile{{/isFormParam}}{{^isFormParam}}{{>optionalDataType}}{{/isFormParam}}{{/reactive}}{{#isArray}}>{{/isArray}}{{/isFile}} {{paramName}}{{^-last}},
         {{/-last}}{{/allParams}}{{#reactive}}{{#hasParams}},
         {{/hasParams}}ServerWebExchange exchange{{/reactive}}{{#vendorExtensions.x-spring-paginated}}{{#hasParams}}, {{/hasParams}}{{^hasParams}}{{#reactive}}, {{/reactive}}{{/hasParams}}final Pageable pageable{{/vendorExtensions.x-spring-paginated}}){{#unhandledException}} throws Exception{{/unhandledException}}{{^jdk8-default-interface}};{{/jdk8-default-interface}}{{#jdk8-default-interface}} {
         {{>methodBody}}

modules/openapi-generator/src/test/resources/3_0/issue18345.yaml

@@ -0,0 +1,19 @@
+openapi: 3.0.3
+info:
+  title: Issue 18345
+  description: ''
+  version: 1.0.0
+paths:
+  /dummy:
+    post:
+      description: ''
+      operationId: uploadFile
+      requestBody:
+        content:
+          application/octet-stream:
+            schema:
+              type: string
+              format: binary
+      responses:
+        '200':
+          description: successful operation

samples/server/petstore/springboot-file-delegate-optional/.openapi-generator-ignore

@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

samples/server/petstore/springboot-file-delegate-optional/.openapi-generator/FILES

@@ -0,0 +1,12 @@
+README.md
+pom.xml
+src/main/java/org/openapitools/OpenApiGeneratorApplication.java
+src/main/java/org/openapitools/RFC3339DateFormat.java
+src/main/java/org/openapitools/api/ApiUtil.java
+src/main/java/org/openapitools/api/DummyApi.java
+src/main/java/org/openapitools/api/DummyApiDelegate.java
+src/main/java/org/openapitools/configuration/HomeController.java
+src/main/java/org/openapitools/configuration/SpringDocConfiguration.java
+src/main/resources/application.properties
+src/main/resources/openapi.yaml
+src/test/java/org/openapitools/OpenApiGeneratorApplicationTests.java

samples/server/petstore/springboot-file-delegate-optional/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.7.0-SNAPSHOT

samples/server/petstore/springboot-file-delegate-optional/README.md

@@ -0,0 +1,21 @@
+# OpenAPI generated server
+
+Spring Boot Server
+
+## Overview
+This server was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.
+By using the [OpenAPI-Spec](https://openapis.org), you can easily generate a server stub.
+This is an example of building a OpenAPI-enabled server in Java using the SpringBoot framework.
+
+
+The underlying library integrating OpenAPI to Spring Boot is [springdoc](https://springdoc.org).
+Springdoc will generate an OpenAPI v3 specification based on the generated Controller and Model classes.
+The specification is available to download using the following url:
+http://localhost:8080/v3/api-docs/
+
+Start your server as a simple java application
+
+You can view the api documentation in swagger-ui by pointing to
+http://localhost:8080/swagger-ui.html
+
+Change default port value in application.properties

samples/server/petstore/springboot-file-delegate-optional/pom.xml

@@ -0,0 +1,97 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.openapitools</groupId>
+    <artifactId>spring-boot-use-optional</artifactId>
+    <packaging>jar</packaging>
+    <name>spring-boot-use-optional</name>
+    <version>1.0.0</version>
+    <properties>
+        <java.version>17</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <springdoc.version>2.2.0</springdoc.version>
+        <swagger-ui.version>5.3.1</swagger-ui.version>
+    </properties>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.1.3</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <repositories>
+        <repository>
+            <id>repository.spring.milestone</id>
+            <name>Spring Milestone Repository</name>
+            <url>https://repo.spring.io/milestone</url>
+        </repository>
+    </repositories>
+    <pluginRepositories>
+        <pluginRepository>
+            <id>spring-milestones</id>
+            <url>https://repo.spring.io/milestone</url>
+        </pluginRepository>
+    </pluginRepositories>
+
+    <build>
+        <sourceDirectory>src/main/java</sourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-commons</artifactId>
+        </dependency>
+          <!--SpringDoc dependencies -->
+        <dependency>
+            <groupId>org.springdoc</groupId>
+            <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
+            <version>${springdoc.version}</version>
+        </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-yaml</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.openapitools</groupId>
+            <artifactId>jackson-databind-nullable</artifactId>
+            <version>0.2.6</version>
+        </dependency>
+        <!-- Bean Validation API support -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

samples/server/petstore/springboot-file-delegate-optional/src/main/java/org/openapitools/OpenApiGeneratorApplication.java

@@ -0,0 +1,30 @@
+package org.openapitools;
+
+import com.fasterxml.jackson.databind.Module;
+import org.openapitools.jackson.nullable.JsonNullableModule;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.FilterType;
+import org.springframework.context.annotation.FullyQualifiedAnnotationBeanNameGenerator;
+
+@SpringBootApplication(
+    nameGenerator = FullyQualifiedAnnotationBeanNameGenerator.class
+)
+@ComponentScan(
+    basePackages = {"org.openapitools", "org.openapitools.api" , "org.openapitools.configuration"},
+    nameGenerator = FullyQualifiedAnnotationBeanNameGenerator.class
+)
+public class OpenApiGeneratorApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(OpenApiGeneratorApplication.class, args);
+    }
+
+    @Bean(name = "org.openapitools.OpenApiGeneratorApplication.jsonNullableModule")
+    public Module jsonNullableModule() {
+        return new JsonNullableModule();
+    }
+
+}

samples/server/petstore/springboot-file-delegate-optional/src/main/java/org/openapitools/RFC3339DateFormat.java

@@ -0,0 +1,38 @@
+package org.openapitools;
+
+import com.fasterxml.jackson.databind.util.StdDateFormat;
+
+import java.text.DateFormat;
+import java.text.FieldPosition;
+import java.text.ParsePosition;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+public class RFC3339DateFormat extends DateFormat {
+  private static final long serialVersionUID = 1L;
+  private static final TimeZone TIMEZONE_Z = TimeZone.getTimeZone("UTC");
+
+  private final StdDateFormat fmt = new StdDateFormat()
+          .withTimeZone(TIMEZONE_Z)
+          .withColonInTimeZone(true);
+
+  public RFC3339DateFormat() {
+    this.calendar = new GregorianCalendar();
+  }
+
+  @Override
+  public Date parse(String source, ParsePosition pos) {
+    return fmt.parse(source, pos);
+  }
+
+  @Override
+  public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
+    return fmt.format(date, toAppendTo, fieldPosition);
+  }
+
+  @Override
+  public Object clone() {
+    return this;
+  }
+}

samples/server/petstore/springboot-file-delegate-optional/src/main/java/org/openapitools/api/ApiUtil.java

@@ -0,0 +1,19 @@
+package org.openapitools.api;
+
+import org.springframework.web.context.request.NativeWebRequest;
+
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+public class ApiUtil {
+    public static void setExampleResponse(NativeWebRequest req, String contentType, String example) {
+        try {
+            HttpServletResponse res = req.getNativeResponse(HttpServletResponse.class);
+            res.setCharacterEncoding("UTF-8");
+            res.addHeader("Content-Type", contentType);
+            res.getWriter().print(example);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

samples/server/petstore/springboot-file-delegate-optional/src/main/java/org/openapitools/api/DummyApi.java

@@ -0,0 +1,66 @@
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) (7.7.0-SNAPSHOT).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+package org.openapitools.api;
+
+import io.swagger.v3.oas.annotations.ExternalDocumentation;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.Parameters;
+import io.swagger.v3.oas.annotations.media.ArraySchema;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.security.SecurityRequirement;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import io.swagger.v3.oas.annotations.enums.ParameterIn;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.*;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import jakarta.annotation.Generated;
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.7.0-SNAPSHOT")
+@Validated
+@Tag(name = "dummy", description = "the dummy API")
+public interface DummyApi {
+
+    default DummyApiDelegate getDelegate() {
+        return new DummyApiDelegate() {};
+    }
+
+    /**
+     * POST /dummy
+     * 
+     *
+     * @param body  (optional)
+     * @return successful operation (status code 200)
+     */
+    @Operation(
+        operationId = "uploadFile",
+        description = "",
+        responses = {
+            @ApiResponse(responseCode = "200", description = "successful operation")
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.POST,
+        value = "/dummy",
+        consumes = { "application/octet-stream" }
+    )
+
+    default ResponseEntity<Void> uploadFile(
+        @Parameter(name = "body", description = "") @Valid @RequestBody(required = false) Optional<org.springframework.core.io.Resource> body
+    ) {
+        return getDelegate().uploadFile(body);
+    }
+
+}