drools急救 - ITeye问答

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drools急救15

最近由于项目的需要，简单学习了drools，但是编写规则文件时，不知道如何引用事实对象中的变量，可能是我的事实对象太复杂了吧，大家帮忙看一下阿：）
程序功能：根据用户的相关信息，以及相关的传感器获得的数据，编写规则文件，判断出用户身体状况是否良好。定义的数据类型及所有程序如下：
数据类型：HealthFact类——〉Person类、SensorInfo类，即HealthFact类型的数据有两个字类型Person、SensorInfo组合而成。下面是具体的实现：package com.gao;
import com.gao.Person;
import com.gao.SensorInfo;
public class HealthFact {
private Person p;
private SensorInfo sensorInfo;
public HealthFact(Person p,SensorInfo sensorInfo){
this.p=p;
this.sensorInfo=sensorInfo;
}
public void setP(Person p){
this.p=p;
}
public Person getP(){
return this.p;
}
public void setSensorInfo(SensorInfo sensorInfo){
this.sensorInfo=sensorInfo;
}
public SensorInfo getSensorInfo(){
return this.sensorInfo;
}
public void printHealthInfo(HealthFact hi){
p.printPerson(p);
sensorInfo.printSensorInfo(sensorInfo);
}
}

package com.gao;

public class Person{
public final static boolean T=true;
public final static boolean F=false;
public final static String M="male";
public final static String FM="female";
private String name=null;
private boolean elder ;
private boolean chronic;
private String location = null;
private String sex;
private int age;
         private String address;
         private String e_mail;
         private String phone;
         private Person friend;
//下面是一些基本的方法，此地略去！
}

下面定义了一个传感器信息类
package com.gao;

public class SensorInfo {
private double temperature;
private double spo2;
private int pulse;
public SensorInfo(double temp,double spo2,int pulse){
this.temperature=temp;
this.spo2=spo2;
this.pulse=pulse;
}
public double getTemperature(){
return this.temperature;
}
public double getSPO2(){
return this.spo2;
}
public int getPulse(){
return this.pulse;
}
public void printSensorInfo(SensorInfo sensorInfo){
System.out.println("temperature:"+temperature
           +"\n spo2:"+spo2
           +"\n pulse:"+pulse);
}
}

事实：package com.gao;

import com.gao.Person;
import com.gao.SensorInfo;
import com.gao.HealthFact;

public class HealthService {
public static void main(String[] args) throws Exception {
         Person p=new Person("James",60, Person.T,"Home");
SensorInfo sensorInfo=new SensorInfo(38.5,97.3,130);
HealthFact[] fact={new HealthFact(p,sensorInfo)};
new RuleRunner().runRules( new String[] { "HealthServices.drl" },fact );
}
}

规则文件如下：
package com.gao

#list any import classes here.

import com.gao.Person;
import com.gao.SensorInfo;
import com.gao.HealthFact;
#declare any global variables here

rule "HealthInfer"
dialect "java"
when
#conditions
        fact:HealthFact(p.chronic==Person.T,p.age>55,sensorInfo.temperature>37.5,sensorInfo.spo2>95.0,sensorInfo.pulse>75)

此时出现：p can't be resolved！
小妹想问问：此种情况下，如何引用fact中的对象？

JBoss