groovy.beans.Bindable 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
* bound property according to the JavaBeans spec, announcing to listeners
* that the value has changed.
*
* 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.
*
* The following example shows how you can use this annotation on fields
* of a class:
*
* class Person {
* @groovy.beans.Bindable
* String firstName
*
* @groovy.beans.Bindable
* def zipCode
* }
*
* The above example will generate code that is similar to the next snippet.
* Notice the difference between a String property and a def/Object property:
*
* public class Person {
* @groovy.beans.Bindable
* private java.lang.String firstName
* @groovy.beans.Bindable
* private java.lang.Object zipCode
* final private java.beans.PropertyChangeSupport this$propertyChangeSupport
*
* public Person() {
* this$propertyChangeSupport = new java.beans.PropertyChangeSupport(this)
* }
*
* public void addPropertyChangeListener(java.beans.PropertyChangeListener listener) {
* this$propertyChangeSupport.addPropertyChangeListener(listener)
* }
*
* public void addPropertyChangeListener(java.lang.String name, java.beans.PropertyChangeListener listener) {
* this$propertyChangeSupport.addPropertyChangeListener(name, listener)
* }
*
* public void removePropertyChangeListener(java.beans.PropertyChangeListener listener) {
* this$propertyChangeSupport.removePropertyChangeListener(listener)
* }
*
* public void removePropertyChangeListener(java.lang.String name, java.beans.PropertyChangeListener listener) {
* this$propertyChangeSupport.removePropertyChangeListener(name, listener)
* }
*
* public void firePropertyChange(java.lang.String name, java.lang.Object oldValue, java.lang.Object newValue) {
* this$propertyChangeSupport.firePropertyChange(name, oldValue, newValue)
* }
*
* public java.beans.PropertyChangeListener[] getPropertyChangeListeners() {
* return this$propertyChangeSupport.getPropertyChangeListeners()
* }
*
* public java.beans.PropertyChangeListener[] getPropertyChangeListeners(java.lang.String name) {
* return this$propertyChangeSupport.getPropertyChangeListeners(name)
* }
*
* public void setFirstName(java.lang.String value) {
* this.firePropertyChange('firstName', firstName, firstName = value )
* }
*
* public void setZipCode(java.lang.Object value) {
* this.firePropertyChange('zipCode', zipCode, zipCode = value )
* }
* }
*
*
* @see BindableASTTransformation
* @author Danno Ferrin (shemnon)
*/
@java.lang.annotation.Documented
@Retention(RetentionPolicy.SOURCE)
@Target({ElementType.FIELD, ElementType.TYPE})
@GroovyASTTransformationClass("groovy.beans.BindableASTTransformation")
public @interface Bindable {
}