[Java] An array of enums is not generated correctly

[Tamarpe]

Description

When the YAML file contains a field with an array of enums, the API Java code generates the field as a single-option select list instead of a multi-select list.

It appears as:

Instead of:

Swagger-codegen version

swagger-codegen-maven-plugin 3.0.54

Swagger declaration file content or url

        - name: testfield
          in: query
          required: false
          schema:
            type: array
            items:
              type: integer
              enum:
                - '0'
                - '1'
                - '2'
                - '3'
                - '4'

Command line used for generation

mvn clean install

Steps to reproduce

Maven:

               <plugin>
                    <groupId>io.swagger.codegen.v3</groupId>
                    <artifactId>swagger-codegen-maven-plugin</artifactId>
                    <version>${swagger-codegen-plugin.version}</version>
                    <executions>
                        <execution>
                            <id>java-model-generation</id>
                            <phase>generate-sources</phase>
                            <goals>
                                <goal>generate</goal>
                            </goals>
                            <configuration>
                                <language>spring</language>
                                <library>spring-cloud</library>
                                <generateApis>true</generateApis>
                                <generateModels>true</generateModels>
                                <generateSupportingFiles>true</generateSupportingFiles>
                                <inputSpec>${project.basedir}/src/main/resources/${openapi.file.name}</inputSpec>
                                <output>${project.build.directory}/generated-sources/swagger</output>
                                <modelPackage>${openapi.model.package}</modelPackage>
                                <apiPackage>${openapi.client.package}</apiPackage>
                                <invokerPackage>${openapi.invoker.package}</invokerPackage>
                            <configOptions>
                                <java8>false</java8>
                                <jdk8>false</jdk8>
                                <defaultInterfaces>false</defaultInterfaces>
                                <interfaceOnly>true</interfaceOnly>
                                <dateLibrary>java8</dateLibrary>
                                <useTags>true</useTags>
                                <defaultInterfaces>false</defaultInterfaces>
                                <jakarta>true</jakarta>
                                <notNullJacksonAnnotation>true</notNullJacksonAnnotation>
                            </configOptions>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>

Suggest a fix/enhancement

When generating an array of enums, the parameter should be annotated with "@ArraySchema" instead of "@Schema". Now it is being generated as:

@Parameter(schema=@Schema(allowableValues={ "0", "1", "2", "3", "4" })) @Valid @RequestParam(value = "testfield", required = false) List<Integer> testfield

Instead of: @Parameter(array = @ArraySchema(schema = @Schema(allowableValues = {"0", "1", "2", "3", "4"})))
@Valid @RequestParam(value = "testfield", required = false) List<Integer> testfield