java.beans

## Interface VetoableChangeListener

- All Superinterfaces:
    EventListener
  All Known Implementing Classes:
    BeanContextServicesSupport, BeanContextSupport, VetoableChangeListenerProxy

      public interface VetoableChangeListener
      extends EventListener

  A VetoableChange event gets fired whenever a bean changes a "constrained" property. You can register a VetoableChangeListener with a source bean so as to be notified of any constrained property updates.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `vetoableChange(PropertyChangeEvent evt)` This method gets called when a constrained property is changed.

- - ### Method Detail

    - #### vetoableChange

          void vetoableChange(PropertyChangeEvent evt)
                       throws PropertyVetoException

      This method gets called when a constrained property is changed.
      Parameters:
        `evt` - a `PropertyChangeEvent` object describing the event source and the property that has changed.
      Throws:
        `PropertyVetoException` - if the recipient wishes the property change to be rolled back.

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