How do I implement embedded Java language in XML document (in a vscode extension)?

I've read docs on https://code.visualstudio.com/api/language-extensions/embedded-languages but still wondering if it's possible to reuse vscode-java language server to provide intellisense/autocomplete features for Java/BeanShell code imbedded in XML like:

<!DOCTYPE Rule PUBLIC "sailpoint.dtd" "sailpoint.dtd">
<Rule language="beanshell" name="">
<Description></Description>
<Source><![CDATA[
  import java.util.Map;

  private Map putInMap(String s1, String s1){
    Map data = new HashMap();
    data.put("first", s1);
    data.put("second", s2);
    return data;
  }
  return putInMap("foo", "bar");
]]></Source>
</Rule>

I guess I don't need to reimplement my own language server from scratch (though BeanShell is not strictly Java, but some reduced version of it) and can refer to the existing Java server from vscode-java. Any suggestions/samples?

Inizia con la documentazione sui linguaggi incorporati e l’integrazione del language server vscode-java descritta nell’issue. Determina se il server esistente può essere riutilizzato per Java o BeanShell all’interno di XML CDATA; il lavoro è completato quando esiste un approccio supportato e documentato oppure una limitazione chiara, idealmente con un esempio.