distrule.drl

import dist.common.rules.define.*
import java.util.List
import org.w3c.dom.Document
import org.w3c.dom.Element
import dist.dgp.controller.Person


//在规则文件当中定义的函数
function Element createElement(Document document,Person person){
    Element element=document.createElement("person");
    element.setAttribute("name",person.getName());
    element.setAttribute("birth",person.getAge().toLocaleString());
    element.setAttribute("id",person.getId().toString());
    element.setAttribute("school",person.getSchool());
    return element;
}

rule "DemoCase"
    no-loop true
    salience 1
    date-effective "2015-01-01"
    date-expires "2017-01-01"
    when
        obj:RuleObject(source!=null,source instanceof List)
    then
        try {
             List<Person> list=(List<Person>) obj.getSource();
             Document document=CommonUtil.createDocument();
             Element root=document.createElement("tree");
             for(Person person:list){
                 root.appendChild(createElement(document,person));
             }
             document.appendChild(root);
             obj.setResult(CommonUtil.XMLToString(document));
        } catch (Exception e) {
             e.printStackTrace();
        }
end