net.sf.doolin.bus.bean
Class Bean

java.lang.Object
  net.sf.doolin.bus.bean.Bean

All Implemented Interfaces:

Serializable, IBean

Direct Known Subclasses:

AbstractActionContext, AbstractFieldDescriptor, AbstractGUIEdit, BusMonitoringLog, BusMonitoringModel, Column, SelectableItem, SystemInformationModel, ValidationSupportImpl, Value, WizardState

public abstract class Bean
extends Object
implements Serializable, IBean

This class defines an object that can notify its changes to the bus.

Notification of changes can be done on the spot, or buffered or completely stopped.

Any Bean can have a parent and we can therefore define a hierarchy of beans. Each level in the hierarchy participates in the notification of changes.

For example, in the following hierarchy:

 A {
        B b;
 }

 B {
        C c;
 }

 C {
        String name;
 }
 

If C notifies a change on name as in:

 C {
        ...
        notify("name", "Old value", "A new name");
        ...
 }
 

Following events are generated on the bus:

 C.name := "A new name";
 B.c.name := "A new name";
 A.b.c.name := "A new name";
 

Author:

Damien Coraboeuf

See Also:

Serialized Form

Constructor Summary

Bean()

Method Summary

BeanNotificationSupport	getBeanNotificationSupport()
IParentBean	getParentBean()
protected void	notify(String propertyName, Object oldValue, Object newValue) Notifies to the bus that a simple property (non-Bean) has changed.
void	setParentBean(IParentBean parentBean) Sets the parent bean for this bean.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Bean

public Bean()

Method Detail

getBeanNotificationSupport

public BeanNotificationSupport getBeanNotificationSupport()

Specified by:

getBeanNotificationSupport in interface IBean

getParentBean

public IParentBean getParentBean()

Specified by:

getParentBean in interface IBean

notify

protected void notify(String propertyName,
                      Object oldValue,
                      Object newValue)

Notifies to the bus that a simple property (non-Bean) has changed. If the notification mode is BUFFERED, the change will be actually sent when notification mode is restored to NORMAL.

Parameters:

propertyName - Name of the property

oldValue - Old value of the property

newValue - New value of the property

See Also:

PropertyChangeMessage

setParentBean

public void setParentBean(IParentBean parentBean)

Sets the parent bean for this bean.

Specified by:

setParentBean in interface IBean

Parameters:

parentBean - New parent bean