Package groovy.beans

Annotation Type Vetoable

  • @Documented
    public @interface Vetoable
    Annotates a groovy property or a class.

    When annotating a property it indicates that the property should be a constrained property according to the JavaBeans spec, subject to listeners vetoing the property change.

    When annotating a class it indicates that all groovy properties in that class should be bound as though each property had the annotation (even if it already has it explicitly).

    It is a compilation error to place this annotation on a field (that is not a property, i.e. has scope visibility modifiers).

    If a property with a user defined setter method is annotated the code block is wrapped with the needed code to fire off the event.

    Here is a simple example of how to annotate a class with Vetoable:

     class Person {
         String firstName
         def zipCode
    This code is transformed by the compiler into something resembling the following snippet. Notice the difference between a String and a def/Object property:
     public class Person implements groovy.lang.GroovyObject { 
         private java.lang.String firstName
         private java.lang.Object zipCode 
         final private java.beans.VetoableChangeSupport this$vetoableChangeSupport 
         public Person() {
             this$vetoableChangeSupport = new java.beans.VetoableChangeSupport(this)
         public void addVetoableChangeListener(java.beans.VetoableChangeListener listener) {
         public void addVetoableChangeListener(java.lang.String name, java.beans.VetoableChangeListener listener) {
             this$vetoableChangeSupport.addVetoableChangeListener(name, listener)
         public void removeVetoableChangeListener(java.beans.VetoableChangeListener listener) {
         public void removeVetoableChangeListener(java.lang.String name, java.beans.VetoableChangeListener listener) {
             this$vetoableChangeSupport.removeVetoableChangeListener(name, listener)
         public void fireVetoableChange(java.lang.String name, java.lang.Object oldValue, java.lang.Object newValue) throws java.beans.PropertyVetoException {
             this$vetoableChangeSupport.fireVetoableChange(name, oldValue, newValue)
         public java.beans.VetoableChangeListener[] getVetoableChangeListeners() {
             return this$vetoableChangeSupport.getVetoableChangeListeners()
         public java.beans.VetoableChangeListener[] getVetoableChangeListeners(java.lang.String name) {
             return this$vetoableChangeSupport.getVetoableChangeListeners(name)
         public void setFirstName(java.lang.String value) throws java.beans.PropertyVetoException {
             this.fireVetoableChange('firstName', firstName, value)
             firstName = value 
         public void setZipCode(java.lang.Object value) throws java.beans.PropertyVetoException {
             this.fireVetoableChange('zipCode', zipCode, value)
             zipCode = value 
    See Also: