TemplateFill.java

public class TemplateFill {
  
  public Template fill(Map<String, String> values, template: Template) {
    Data data = template.getData();
    List<Property> newData = new ArrayList<>();
    for (Property p: data) {
      if (values.contains(p.getName()) {
        newData.add(p.withValue(values.get(p.getName()));
      }
    }
    return new Data(newData)
  }  
}