groovy.beans.Vetoable Maven / Gradle / Ivy
/*
* Copyright 2008-2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package groovy.beans;
import org.codehaus.groovy.transform.GroovyASTTransformationClass;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* 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:
*
* @groovy.beans.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) {
* this$vetoableChangeSupport.addVetoableChangeListener(listener)
* }
*
* public void addVetoableChangeListener(java.lang.String name, java.beans.VetoableChangeListener listener) {
* this$vetoableChangeSupport.addVetoableChangeListener(name, listener)
* }
*
* public void removeVetoableChangeListener(java.beans.VetoableChangeListener listener) {
* this$vetoableChangeSupport.removeVetoableChangeListener(listener)
* }
*
* public void removeVetoableChangeListener(java.lang.String name, java.beans.VetoableChangeListener listener) {
* this$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 VetoableASTTransformation
* @author Danno Ferrin (shemnon)
*/
@java.lang.annotation.Documented
@Retention(RetentionPolicy.SOURCE)
@Target({ElementType.FIELD, ElementType.TYPE})
@GroovyASTTransformationClass("groovy.beans.VetoableASTTransformation")
public @interface Vetoable {
}