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?

Comienza con la documentación sobre lenguajes embebidos y la integración del servidor de lenguaje vscode-java descrita en el issue. Determina si el servidor existente puede reutilizarse para Java o BeanShell dentro de XML CDATA; se considera completado cuando exista un enfoque compatible documentado o una limitación clara, idealmente con un ejemplo.