simthermometer.java

drools 一个开放源码的规则引擎

package org.drools.spring.examples.jiahvac.sim;

/*
 * Copyright 2005 (C) The Werken Company. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 * and/or other materials provided with the distribution.
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 * 3. The name "drools" must not be used to endorse or promote products derived
 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a registered trademark of The Werken Company.
 *
 * 5. Due credit should be given to The Werken Company.
 * (http://drools.werken.com/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

import org.drools.spring.examples.jiahvac.model.Thermometer;

public class SimThermometer implements Thermometer {

    private final SimFloor floor;
    private double reading;
    private double prevReading;
    private PropertyChangeSupport pcs = new PropertyChangeSupport(this);

    public SimThermometer(SimFloor floor, double reading) {
        this.floor = floor;
        this.reading = reading;
        this.prevReading = reading-1;
    }

    public SimThermometer(SimFloor floor) {
        this(floor, 0);
    }

    public SimFloor getFloor() {
        return floor;
    }

    public double getReading() {
        return reading;
    }

    public void setReading(double reading) {
        prevReading = this.reading;
        this.reading = reading;
        pcs.firePropertyChange("reading", new Double(prevReading), new Double(reading));
    }

    public void addPropertyChangeListener(PropertyChangeListener listener) {
        pcs.addPropertyChangeListener(listener);
    }

    public void removePropertyChangeListener(PropertyChangeListener listener) {
        pcs.removePropertyChangeListener(listener);
    }

    @Override
    public String toString() {
        return "t("+floor.getNumber()+")=" + reading;
    }
}