withXml generated code broken for JavaSpring and Java Resttemplate generators with wrapped collections

[eicki]

Description

I tried to add xml support for our openapi specs we defined. We use JavaSpring generator for the server and RestTemplate generator for the client.
As a test I tried

animals:
  type: array
  items:
    type: string
    xml:
      name: animal
  xml:
    name: aliens
    wrapped: true

taken from OpenApi 3.0.2 Spec.
Along with the option withXml the generated code is not correct.
For the client (Resttemplate generator) it generates:

  @XmlElement(name = "animal")
  @XmlElementWrapper(name = "aliens")
  private List<String> animals = null;
  @JacksonXmlElementWrapper(useWrapping = true, localName = "animal") 
  public List<String> getAnimals() {
    return animals;
  }

The XmlElement and XmlElementWrapper annotations are correct, but JacksonXmlElementWrapper is not, I would expect

 @JacksonXmlElementWrapper (localName = "aliens")
 @JacksonXmlProperty (localName = "animal")

For the JavaSpring generator it generates

@JacksonXmlProperty(localName = "aliens") // no wrapper annotations at all
private List<String> animals = null;

which is wrong, I expect the same annotations as for the client

 @JacksonXmlElementWrapper (localName = "aliens")
 @JacksonXmlProperty (localName = "animal")

and to be able to choose between technologies, I think you should also include XmlElement and XmlElementWrapper annotations.

openapi-generator version

4.2.2

OpenAPI declaration file content or url

animals:
  type: array
  items:
    type: string
    xml:
      name: animal
  xml:
    name: aliens
    wrapped: true

Command line used for generation

Used openapi-generator-maven-plugin 4.2.2

<generatorName>spring</generatorName>
<library>spring-mvc</library>
<configOptions>
  <dateLibrary>java8</dateLibrary>
  <java8>true</java8>
  <interfaceOnly>true</interfaceOnly>
  <withXml>true</withXml>
</configOptions>

and for the client

<generatorName>java</generatorName>
<library>resttemplate</library>
<configOptions>
  <dateLibrary>java8</dateLibrary>
  <java8>true</java8>
  <withXml>true</withXml>
</configOptions>

Steps to reproduce

Create a yaml spec containing the above model definition taken from the spec