abstractdamper.java

来自「这是一个以JAVA编写的程序,本人还没有试过,是一个简单的温度控制系统」· Java 代码 · 共 53 行

package net.sf.dz.device.actuator.impl;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.freehold.jukebox.logger.LogAware;

import net.sf.dz.device.actuator.Damper;
import net.sf.dz.event.DamperListener;

abstract public class AbstractDamper extends LogAware implements Damper {

    private Set listenerSet = new HashSet();
    
    public void set(double throttle) {
    
        if ( throttle < 0 || throttle > 1.0 ) {
        
            throw new IllegalArgumentException("Throttle out of 0...1 range: " + throttle);
        }
        
        moveDamper(throttle);

        throttleChanged(throttle);
    }

    public final void addListener(DamperListener l) {
    
        listenerSet.add(l);
    }
    
    public final void removeListener(DamperListener l) {
    
        listenerSet.remove(l);
    }
    
    protected void throttleChanged(double value) {
    
        for ( Iterator i = listenerSet.iterator(); i.hasNext(); ) {
        
            ((DamperListener)i.next()).throttleChanged(this, value);
        }
    }
    
    protected abstract void moveDamper(double throttle);
    
    protected void configure() throws Throwable {
    
        // This is just here as a stub, in case we ever need it
    }
}