import java.beans.*;
import edu.vt.cs.collab.cork.ReplicatedObjectClient;
import edu.vt.cs.collab.cork.ObjectID;

/**
 * Listener class for a TestBean. When a property change is detected,
 * a TestBeanChange object is created and passed to a CORK 
 * ReplicatedObjectClient.
 */
public class TestBeanListener implements PropertyChangeListener {
    /**
     * The ReplicatedObjectClient that we're using to communicate
     * with CORK.
     */
    private ReplicatedObjectClient client = null;

    public TestBeanListener(ReplicatedObjectClient client) {
	this.client = client;
    }

    public void propertyChange(PropertyChangeEvent pce) {
	String prop = pce.getPropertyName();
	if (prop.equals("value")) {
	    TestBean src = (TestBean) pce.getSource();

	    // Find our TestBean's object identifier
	    ObjectID id = client.getObjectID(src);
	    if (id != null) {
		// Construct a Change object that knows how to set
		// the "value" property to the new value.
		TestBeanChange ch = 
		    new TestBeanChange((String)pce.getNewValue());

		// Broadcast the change to the server and to any other
		// active replicas of this object
		client.broadcastChange(ch, id);
	    }
	    else {
		// If we didn't have an ObjectID, then CORK doesn't
		// know about the TestBean that we're attached to
		System.err.println("WARNING: TestBean not replicated");
	    }
	}
    }
}