1 files changed, 90 insertions, 0 deletions
diff --git a/docs/examples/bean/BoundPoint.java b/docs/examples/bean/BoundPoint.java
new file mode 100644
index 000000000..36c85819c
--- /dev/null
+++ b/docs/examples/bean/BoundPoint.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 1998-2002 Xerox Corporation,
+ *               2004 Contributors.  All rights reserved.
+ *
+ * Use and copying of this software and preparation of derivative works based
+ * upon this software are permitted.  Any distribution of this software or
+ * derivative works must comply with all applicable United States export
+ * control laws.
+ *
+ * This software is made available AS IS, and Xerox Corporation makes no
+ * warranty about the software, its performance or its conformity to any
+ * specification.
+ */
+
+package bean;
+
+import java.beans.*;
+import java.io.Serializable;
+
+/**
+ * Add bound properties and serialization to Point objects
+ */
+aspect BoundPoint {
+  /*
+   * privately declare a field on Point to hold the property
+   * change support object.  `this' is a reference to a Point object.
+   */
+  private PropertyChangeSupport Point.support = new PropertyChangeSupport(this);
+
+  /*
+   * Declare property change registration methods on Point,
+   * and introduce implementation of the Serializable interface.
+   */
+   
+  public void Point.addPropertyChangeListener(PropertyChangeListener listener){
+    support.addPropertyChangeListener(listener);
+  }
+
+  public void Point.addPropertyChangeListener(String propertyName,
+                                              PropertyChangeListener listener){
+    support.addPropertyChangeListener(propertyName, listener);
+  }
+
+  public void Point.removePropertyChangeListener(String propertyName,
+                                                 PropertyChangeListener listener) {
+    support.removePropertyChangeListener(propertyName, listener);
+  }
+
+  public void Point.removePropertyChangeListener(PropertyChangeListener listener) {
+    support.removePropertyChangeListener(listener);
+  }
+
+  public void Point.hasListeners(String propertyName) {
+    support.hasListeners(propertyName);
+  }
+
+  declare parents: Point implements Serializable;
+
+  /**
+   * Send property change event after X setter completes normally.
+   * Use around advice to keep the old value on the stack.
+   */
+  void around(Point p): execution(void Point.setX(int)) && target(p) {
+      int oldValue = p.getX();
+      proceed(p);
+      firePropertyChange(p, "x", oldValue, p.getX());
+  }
+
+  /**
+   * Send property change event after Y setter completes normally.
+   * Use around advice to keep the old value on the stack.
+   */
+  void around(Point p): execution(void Point.setY(int)) && target(p) {
+      int oldValue = p.getY();
+      proceed(p);
+      firePropertyChange(p, "y", oldValue, p.getY());
+  }
+  
+  /*
+   * Utility to fire the property change event.
+   */
+  void firePropertyChange(Point p,
+                          String property,
+                          double oldval,
+                          double newval) {        
+        p.support.firePropertyChange(property,
+                                 new Double(oldval),
+                                 new Double(newval));
+  }
+}