[BUG] [Java] Unexpected behavior when using annotationlibrary swagger2

[saskiabikle]

Description

I have model class with a date-time property which is defined as:

creationdate:
      format: date-time
      description: the creation date
      type: string
      example: '2022-10-07T01:00:00.000+02:00'

the maven config looks like:

<configuration>
    <output>${project.build.directory}/generated-sources/</output>
    <inputSpec>${project.basedir}/src/main/resources/openapi.yaml</inputSpec>
    <generatorName>java</generatorName>
    <configOptions>
        <library>native</library>
        <sourceFolder>/src/main/java</sourceFolder>
        <serializableModel>true</serializableModel>
        <hideGenerationTimestamp>true</hideGenerationTimestamp>
        <allowUnicodeIdentifiers>true</allowUnicodeIdentifiers>
        <useJakartaEe>true</useJakartaEe>
        <supportUrlQuery>false</supportUrlQuery>
        <annotationLibrary>swagger2</annotationLibrary>
        <sortModelPropertiesByRequiredFlag>false</sortModelPropertiesByRequiredFlag>
        <skipDefaultInterface>true</skipDefaultInterface>
    </configOptions>
    <modelPackage>com.github.saskiabikle.openapi.test.model</modelPackage>
    <generateApis>false</generateApis>
    <generateSupportingFiles>false</generateSupportingFiles>
    <generateModelDocumentation>false</generateModelDocumentation>
    <generateModelTests>false</generateModelTests>
    <skipValidateSpec>false</skipValidateSpec>
</configuration>

the generated annotation looks like:

@Schema(example = "2022-10-07T01:00+02:00", requiredMode = Schema.RequiredMode.NOT_REQUIRED, description = "the creation date")

As you can see the seconds are missing.

If I check the definition of the default date-time (https://spec.openapis.org/registry/format/date-time) it refers to https://www.rfc-editor.org/rfc/rfc3339#section-5.6. There are seconds required.

openapi-generator version

I used 7.14.0 and the current master branch. The result is the same

OpenAPI declaration file content or url

openapi: 3.0.3
info:
    title: Blank API
    version: 1.0.0
    description: This is a simple API descriptor.
paths:
    /:
        get:
            responses:
                '200':
                    content:
                        application/json:
                            schema:
                                type: array
                                items:
                                    $ref: '#/components/schemas/MyModel'
                    description: getAll
            summary: getAll
components:
    schemas:
        MyModel:
            title: Root Type for MyModel
            description: My Testmodel
            type: object
            properties:
                creationdate:
                    format: date-time
                    description: the creation date
                    type: string
                    example: '2022-10-07T01:00:00.000+02:00'

Steps to reproduce

If you use the example as mention the seconds are missing.
If you change the seconds from '00' to '01' the seconds the output is valid, because seconds are present.

Suggest a fix

I you can point me to code/unit test I would be able to create a PR.