git.gag.com Git - sw/motorsim/blob - src/com/billkuker/rocketry/motorsim/ChangeListening.aj

   1 package com.billkuker.rocketry.motorsim;
   2
   3 import java.beans.PropertyChangeEvent;
   4 import java.beans.PropertyChangeListener;
   5 import java.beans.PropertyChangeSupport;
   6 import java.lang.reflect.Method;
   7
   8 import javax.swing.event.ChangeListener;
   9
  10 import com.billkuker.rocketry.motorsim.grain.MultiGrain;
  11
  12 public aspect ChangeListening {
  13
  14         public interface Subject {
  15                 // public void addPropertyChangeListener(PropertyChangeListener l);
  16         }
  17
  18         private PropertyChangeSupport Subject.pcs;
  19
  20         public void Subject.addPropertyChangeListener(PropertyChangeListener l) {
  21                 //System.out.println("PCS Added");
  22                 pcs.addPropertyChangeListener(l);
  23         }
  24
  25         public void Subject.removePropertyChangeListener(PropertyChangeListener l) {
  26                 //System.out.println("PCS Removed");
  27                 pcs.addPropertyChangeListener(l);
  28         }
  29
  30         public void Subject.firePropertyChange(PropertyChangeEvent e) {
  31                 pcs.firePropertyChange(e);
  32         }
  33
  34         declare parents: Motor || Grain || Chamber || Nozzle || Fuel implements Subject;
  35
  36         void around(Subject s, Object newVal):
  37                 execution(void Subject+.set*(..)) && target(s) && args(newVal) {
  38                 System.out.println(s);
  39                 String name = thisJoinPointStaticPart.getSignature().getName();
  40                 name = name.replaceFirst("set", "");
  41                 Object old = null;
  42                 try {
  43                         String pre = "get";
  44                         if (newVal instanceof Boolean)
  45                                 pre = "is";
  46                         Method m = s.getClass().getMethod(pre + name);
  47                         old = m.invoke(s);
  48
  49                 } catch (Throwable t) {
  50                         System.err.print("Error getting old value for " + name);
  51                 }
  52                 proceed(s, newVal);
  53                 if (old != newVal) {
  54                         System.out.println(name + " changed from " + old + " to "
  55                                         + newVal);
  56                         s.pcs.firePropertyChange(name, old, newVal);
  57                 }
  58         }
  59
  60         after(Subject s) returning: this(s) && initialization(Subject.new(..)) {
  61                 s.pcs = new PropertyChangeSupport(s);
  62         }
  63 }