com.jgoodies.binding.extras
Class NonNullValueModel
- Observable, Serializable, ValueModel
public final class NonNullValueModel
A
ValueModel
implementation that avoids
null
values.
It wraps another ValueModel and returns a (non-null) default value
if the wrapped ValueModel returns null.
Note that value change events fired by this model may use null
as old and/or new value. This is because PropertyChangeEvents use null
to indicate that the old and/or new value is not provided by the event.
Note: This class is not yet part of the binary Binding
library; it comes with the Binding distributions as an extra.
The API is work in progress and may change without notice;
this class may even be completely removed from future distributions.
If you want to use this class, you may consider copying it into
your code base.
Object | getValue() - Returns this model's current subject value.
|
void | setValue(Object newValue) - Sets the given value to the wrapped ValueModel.
|
String toString , addValueChangeListener , booleanValue , doubleValue , fireValueChange , fireValueChange , fireValueChange , fireValueChange , fireValueChange , fireValueChange , fireValueChange , floatValue , getString , intValue , longValue , removeValueChangeListener , setValue , setValue , setValue , setValue , setValue |
addPropertyChangeListener , addPropertyChangeListener , addVetoableChangeListener , addVetoableChangeListener , equals , fireIndexedPropertyChange , fireIndexedPropertyChange , fireIndexedPropertyChange , fireMultiplePropertiesChanged , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , fireVetoableChange , fireVetoableChange , fireVetoableChange , fireVetoableChange , fireVetoableChange , fireVetoableChange , fireVetoableChange , getPropertyChangeListeners , getPropertyChangeListeners , getVetoableChangeListeners , getVetoableChangeListeners , removePropertyChangeListener , removePropertyChangeListener , removeVetoableChangeListener , removeVetoableChangeListener |
NonNullValueModel
public NonNullValueModel(ValueModel subject,
Object defaultValue)
Constructs an NonNullValueModel for the given ValueModel.
subject
- the underlying (or wrapped) ValueModeldefaultValue
- the value used whenever the wrapped model
returns null
getValue
public Object getValue()
Returns this model's current subject value.
- getValue in interface ValueModel
- this model's current subject value.
setValue
public void setValue(Object newValue)
Sets the given value to the wrapped ValueModel.
The value set can be null
.
- setValue in interface ValueModel
newValue
- the value to set
Copyright © 2002-2008 JGoodies Karsten Lentzsch. All Rights Reserved.