Examples of java.beans.PropertyChangeSupport

java.beans.PropertyChangeSupport
This is a utility class that can be used by beans that support bound properties. You can use an instance of this class as a member field of your bean and delegate various work to it. This class is serializable. When it is serialized it will save (and restore) any listeners that are themselves serializable. Any non-serializable listeners will be skipped during serialization.

    public BeanContextChildSupport(BeanContextChild bcc) {
  super();


  beanContextChildPeer = (bcc != null) ? bcc : this;


  pcSupport = new PropertyChangeSupport(beanContextChildPeer);
  vcSupport = new VetoableChangeSupport(beanContextChildPeer);
    }

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    private static PropertyChangeSupport createPropertyChangeSupport(Toolkit toolkit) {
        if (toolkit instanceof SunToolkit || toolkit instanceof HeadlessToolkit) {
            return new DesktopPropertyChangeSupport(toolkit);
        } else {
            return new PropertyChangeSupport(toolkit);
        }
    }

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        @Override
        public synchronized void addPropertyChangeListener(
                String propertyName,
                PropertyChangeListener listener)
        {
            PropertyChangeSupport pcs = (PropertyChangeSupport)
                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null == pcs) {
                pcs = new PropertyChangeSupport(source);
                AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
            }
            pcs.addPropertyChangeListener(propertyName, listener);
        }

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        }


        @Override
        public synchronized PropertyChangeListener[] getPropertyChangeListeners()
        {
            PropertyChangeSupport pcs = (PropertyChangeSupport)
                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null != pcs) {
                return pcs.getPropertyChangeListeners();
            } else {
                return new PropertyChangeListener[0];
            }
        }

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        }


        @Override
        public synchronized PropertyChangeListener[] getPropertyChangeListeners(String propertyName)
        {
            PropertyChangeSupport pcs = (PropertyChangeSupport)
                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null != pcs) {
                return pcs.getPropertyChangeListeners(propertyName);
            } else {
                return new PropertyChangeListener[0];
            }
        }

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            }
        }


        @Override
        public synchronized void addPropertyChangeListener(PropertyChangeListener listener) {
            PropertyChangeSupport pcs = (PropertyChangeSupport)
                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null == pcs) {
                pcs = new PropertyChangeSupport(source);
                AppContext.getAppContext().put(PROP_CHANGE_SUPPORT_KEY, pcs);
            }
            pcs.addPropertyChangeListener(listener);
        }

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            pcs.addPropertyChangeListener(listener);
        }


        @Override
        public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {
            PropertyChangeSupport pcs = (PropertyChangeSupport)
                    AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
            if (null != pcs) {
                pcs.removePropertyChangeListener(listener);
            }
        }

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            if (oldValue != null && newValue != null && oldValue.equals(newValue)) {
                return;
            }
            Runnable updater = new Runnable() {
                public void run() {
                    PropertyChangeSupport pcs = (PropertyChangeSupport)
                            AppContext.getAppContext().get(PROP_CHANGE_SUPPORT_KEY);
                    if (null != pcs) {
                        pcs.firePropertyChange(evt);
                    }
                }
            };
            final AppContext currentAppContext = AppContext.getAppContext();
            for (AppContext appContext : AppContext.getAppContexts()) {

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  private PropertyChangeSupport getPropertyChangeNotifier()
  {
    if (_propChgNotifier == null)
    {
      _propChgNotifier = new PropertyChangeSupport(_srcBean);
    }
    return _propChgNotifier;
  }

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        buttonTextHashmap = new HashMap();
        buttonIconHashmap = new HashMap();
        buttonEnabledHashmap = new HashMap();
        
        propertyChangeSupport = new PropertyChangeSupport(this);


    }

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