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java.lang.Objectcom.jgoodies.common.bean.Bean
com.jgoodies.binding.beans.Model
com.jgoodies.binding.value.AbstractValueModel
com.jgoodies.binding.extras.NonNullValueModel
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.
Field Summary |
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Fields inherited from class com.jgoodies.common.bean.Bean |
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changeSupport |
Fields inherited from interface com.jgoodies.binding.value.ValueModel |
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PROPERTY_VALUE |
Constructor Summary | |
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NonNullValueModel(ValueModel subject,
Object defaultValue)
Constructs an NonNullValueModel for the given ValueModel. |
Method Summary | |
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Object |
getValue()
Returns this model's current subject value. |
void |
setValue(Object newValue)
Sets the given value to the wrapped ValueModel. |
Methods inherited from class com.jgoodies.binding.value.AbstractValueModel |
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addValueChangeListener, booleanValue, doubleValue, fireValueChange, fireValueChange, fireValueChange, fireValueChange, fireValueChange, fireValueChange, fireValueChange, floatValue, getString, intValue, longValue, paramString, removeValueChangeListener, setValue, setValue, setValue, setValue, setValue, toString, valueString |
Methods inherited from class com.jgoodies.binding.beans.Model |
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createPropertyChangeSupport, firePropertyChange |
Methods inherited from class com.jgoodies.common.bean.Bean |
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addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, addVetoableChangeListener, fireIndexedPropertyChange, fireIndexedPropertyChange, fireIndexedPropertyChange, fireMultiplePropertiesChanged, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, getPropertyChangeListeners, getPropertyChangeListeners, getVetoableChangeListeners, getVetoableChangeListeners, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, removeVetoableChangeListener |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public NonNullValueModel(ValueModel subject, Object defaultValue)
subject
- the underlying (or wrapped) ValueModeldefaultValue
- the value used whenever the wrapped model
returns null
NullPointerException
- if the subject or defaultValue is null
Method Detail |
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public Object getValue()
public void setValue(Object newValue)
null
.
newValue
- the value to set
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