A helper class for observing changes in bound bean properties where the target bean changes. Provides two access styles to the target bean that holds the observed property: you can specify a bean directly, or you can use a
bean channel to access the bean indirectly. In the latter case you specify a
ValueModel
that holds the bean that in turn holds the observed properties.
If the target bean is null
won't report any changes.
It is recommended to remove all listener by invoking #removeAll
if the observed bean lives much longer than this change support instance. As an alternative you may use event listener lists that are based on WeakReference
s.
Constraints: All target bean classes must support bound properties, i. e. must provide the following pair of methods for registration of multicast property change event listeners:
public void addPropertyChangeListener(PropertyChangeListener x); public void removePropertyChangeListener(PropertyChangeListener x);
and the following methods for listening on named properties:
public void addPropertyChangeListener(String, PropertyChangeListener x); public void removePropertyChangeListener(String, PropertyChangeListener x);
@author Karsten Lentzsch
@version $Revision: 1.10 $
@see PropertyChangeEvent
@see PropertyChangeListener
@see PropertyChangeSupport
@see net.helipilot50.stocktrade.displayproject.binding.beans.BeanAdapter Copyright (c) 2002-2005 JGoodies Karsten Lentzsch. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: o Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. o Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. o Neither the name of JGoodies Karsten Lentzsch nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.