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## com.jgoodies.binding.value
Class AbstractValueModel

    java.lang.Object
      com.jgoodies.common.bean.Bean
          com.jgoodies.binding.beans.Model
              com.jgoodies.binding.value.AbstractValueModel

All Implemented Interfaces:
  ValueModel, com.jgoodies.common.bean.ObservableBean, com.jgoodies.common.bean.ObservableBean2, Serializable

Direct Known Subclasses:
  AbstractVetoableValueModel, AbstractWrappedValueModel, BeanAdapter.SimplePropertyAdapter, BufferedValueModel, DelayedReadValueModel, DelayedWriteValueModel, NonNullValueModel, PreferencesAdapter, PropertyAdapter, Trigger, ValueHolder

    public abstract class AbstractValueModel

extends Model
implements ValueModel

An abstract class that minimizes the effort required to implement the `ValueModel` interface. It provides convenience methods to convert boolean, double, float, int, and long to their corresponding Object values and vice versa.

Subclasses must implement `getValue()` and `setValue(Object)` to get and set this model's value.

Version:
  $Revision: 1.12 $
Author:
  Karsten Lentzsch
See Also:
  `ExtendedPropertyChangeSupport`, Serialized Form

Field Summary

Fields inherited from class com.jgoodies.common.bean.Bean
`changeSupport`

Fields inherited from interface com.jgoodies.binding.value.ValueModel
`PROPERTY_VALUE`

Constructor Summary
`AbstractValueModel()`

Method Summary
`void` | `addValueChangeListener(PropertyChangeListener l)` Registers the given PropertyChangeListener with this model.
`boolean` | `booleanValue()` Converts this model's value and returns it as a `boolean`.
`double` | `doubleValue()` Converts this model's value and returns it as a `double`.
`void` | `fireValueChange(boolean oldValue, boolean newValue)` Notifies all listeners that have registered interest for notification on this event type.
`void` | `fireValueChange(double oldValue, double newValue)` Notifies all listeners that have registered interest for notification on this event type.
`void` | `fireValueChange(float oldValue, float newValue)` Notifies all listeners that have registered interest for notification on this event type.
`void` | `fireValueChange(int oldValue, int newValue)` Notifies all listeners that have registered interest for notification on this event type.
`void` | `fireValueChange(long oldValue, long newValue)` Notifies all listeners that have registered interest for notification on this event type.
`void` | `fireValueChange(Object oldValue, Object newValue)` Notifies all listeners that have registered interest for notification on this event type.
`void` | `fireValueChange(Object oldValue, Object newValue, boolean checkIdentity)` Notifies all listeners that have registered interest for notification on this event type.
`float` | `floatValue()` Converts this model's value and returns it as a `float`.
`String` | `getString()` Converts this model's value and returns it as a `String`.
`int` | `intValue()` Converts this model's value and returns it as an `int`.
`long` | `longValue()` Converts this model's value and returns it as a `long`.
`protected String` | `paramString()` Returns a string representing the state of this model.
`void` | `removeValueChangeListener(PropertyChangeListener l)` Removes the given PropertyChangeListener from the model.
`void` | `setValue(boolean b)` Converts the given `boolean` to a `Boolean` and sets it as new value.
`void` | `setValue(double d)` Converts the given `double` to a `Double` and sets it as new value.
`void` | `setValue(float f)` Converts the given `float` to a `Float` and sets it as new value.
`void` | `setValue(int i)` Converts the given `int` to an `Integer` and sets it as new value.
`void` | `setValue(long l)` Converts the given `long` to a `Long` and sets it as new value.
`String` | `toString()` Returns a string representation of this value model.
`protected String` | `valueString()` Returns a string representing the value of this model.

Methods inherited from class com.jgoodies.binding.beans.Model
`createPropertyChangeSupport, firePropertyChange`

Methods inherited from class com.jgoodies.common.bean.Bean
`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
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface com.jgoodies.binding.value.ValueModel
`getValue, setValue`

Constructor Detail

### AbstractValueModel

    public AbstractValueModel()

Method Detail

### addValueChangeListener

    public final void addValueChangeListener(PropertyChangeListener l)

  Registers the given PropertyChangeListener with this model. The listener will be notified if the value has changed.

  The PropertyChangeEvents delivered to the listener have the name set to "value". In other words, the listeners won't get notified when a PropertyChangeEvent is fired that has a null object as the name to indicate an arbitrary set of the event source's properties have changed.

  In the rare case, where you want to notify a PropertyChangeListener even with PropertyChangeEvents that have no property name set, you can register the listener with #addPropertyChangeListener, not #addValueChangeListener.

  Specified by:
    `addValueChangeListener` in interface `ValueModel`
  Parameters:
    `l` - the listener to add
  See Also:
    `ValueModel`

### removeValueChangeListener

    public final void removeValueChangeListener(PropertyChangeListener l)

  Removes the given PropertyChangeListener from the model.

  Specified by:
    `removeValueChangeListener` in interface `ValueModel`
  Parameters:
    `l` - the listener to remove

### fireValueChange

    public final void fireValueChange(Object oldValue,
                                      Object newValue)

  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

  Parameters:
    `oldValue` - the value before the change
    `newValue` - the value after the change
  See Also:
    `PropertyChangeSupport`

### fireValueChange

    public final void fireValueChange(Object oldValue,
                                      Object newValue,
                                      boolean checkIdentity)

  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

  The boolean parameter specifies whether differences between the old and new value are tested using `==` or `#equals`.

  Parameters:
    `oldValue` - the value before the change
    `newValue` - the value after the change
    `checkIdentity` - true to compare the old and new value using `==`, false to use `#equals`
  See Also:
    `PropertyChangeSupport`

### fireValueChange

    public final void fireValueChange(boolean oldValue,
                                      boolean newValue)

  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

  Parameters:
    `oldValue` - the boolean value before the change
    `newValue` - the boolean value after the change
  See Also:
    `PropertyChangeSupport`

### fireValueChange

    public final void fireValueChange(int oldValue,
                                      int newValue)

  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

  Parameters:
    `oldValue` - the int value before the change
    `newValue` - the int value after the change
  See Also:
    `PropertyChangeSupport`

### fireValueChange

    public final void fireValueChange(long oldValue,
                                      long newValue)

  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

  Parameters:
    `oldValue` - the long value before the change
    `newValue` - the long value after the change
  See Also:
    `PropertyChangeSupport`

### fireValueChange

    public final void fireValueChange(double oldValue,
                                      double newValue)

  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

  Parameters:
    `oldValue` - the double value before the change
    `newValue` - the double value after the change
  See Also:
    `PropertyChangeSupport`

### fireValueChange

    public final void fireValueChange(float oldValue,
                                      float newValue)

  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

  Parameters:
    `oldValue` - the float value before the change
    `newValue` - the float value after the change
  See Also:
    `PropertyChangeSupport`

### booleanValue

    public final boolean booleanValue()

  Converts this model's value and returns it as a `boolean`.

  Returns:
    the `boolean` value
  Throws:
    `ClassCastException` - if the observed value is not of type `Boolean`
    `NullPointerException` - if the value is `null`

### doubleValue

    public final double doubleValue()

  Converts this model's value and returns it as a `double`.

  Returns:
    the `double` value
  Throws:
    `ClassCastException` - if the observed value is not of type `Double`
    `NullPointerException` - if the value is `null`

### floatValue

    public final float floatValue()

  Converts this model's value and returns it as a `float`.

  Returns:
    the `float` value
  Throws:
    `ClassCastException` - if the observed value is not of type `Float`
    `NullPointerException` - if the value is `null`

### intValue

    public final int intValue()

  Converts this model's value and returns it as an `int`.

  Returns:
    the `int` value
  Throws:
    `ClassCastException` - if the observed value is not of type `Integer`
    `NullPointerException` - if the value is `null`

### longValue

    public final long longValue()

  Converts this model's value and returns it as a `long`.

  Returns:
    the `long` value
  Throws:
    `ClassCastException` - if the observed value is not of type `Long`
    `NullPointerException` - if the value is `null`

### getString

    public String getString()

  Converts this model's value and returns it as a `String`.

  Returns:
    this model's value as String
  Throws:
    `ClassCastException` - if the observed value is not of type `String`

### setValue

    public final void setValue(boolean b)

  Converts the given `boolean` to a `Boolean` and sets it as new value.

  Parameters:
    `b` - the value to be converted and set as new value

### setValue

    public final void setValue(double d)

  Converts the given `double` to a `Double` and sets it as new value.

  Parameters:
    `d` - the value to be converted and set as new value

### setValue

    public final void setValue(float f)

  Converts the given `float` to a `Float` and sets it as new value.

  Parameters:
    `f` - the value to be converted and set as new value

### setValue

    public final void setValue(int i)

  Converts the given `int` to an `Integer` and sets it as new value.

  Parameters:
    `i` - the value to be converted and set as new value

### setValue

    public final void setValue(long l)

  Converts the given `long` to a `Long` and sets it as new value.

  Parameters:
    `l` - the value to be converted and set as new value

### toString

    public String toString()

  Returns a string representation of this value model. Answers the print string of the observed value.

  Overrides:
    `toString` in class `Object`
  Returns:
    a string representation of this value model

### paramString

    protected String paramString()

  Returns a string representing the state of this model. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be `null`.

  Returns:
    a string representation of this model's state
  Since:
    2.0.3

### valueString

    protected String valueString()

  Returns a string representing the value of this model. This method is intended to be used for debugging purposes only.

  Returns:
    a string representation of this model's value
  Since:
    2.0.3

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