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Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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 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 org.apache.cayenne.swing;
import  org.apache.cayenne.CayenneRuntimeException;

A binding that registers for action events of an arbitrary Component JavaBean that provides a way to add an ActionListener via BeanDescriptor.
public class BeanActionBinding extends BindingBase {
    protected Component view;
    public BeanActionBinding(Component componentString actionExpression) {
        this. = component;
        boolean foundActionEvents = false;
        try {
            BeanInfo info = Introspector.getBeanInfo(component.getClass());
            EventSetDescriptor[] events = info.getEventSetDescriptors();
            if (events != null && events.length > 0) {
                for (EventSetDescriptor event : events) {
                    if (ActionListener.class
                            .isAssignableFrom(event.getListenerType())) {
                        event.getAddListenerMethod().invoke(componentnew ActionListener() {
                                    public void actionPerformed(ActionEvent e) {
                        foundActionEvents = true;
        catch (Exception e) {
            throw new CayenneRuntimeException("Error binding to component"e);
        if (!foundActionEvents) {
            throw new CayenneRuntimeException("Component does not define action events: "
                    + component);
    public Component getView() {
        if ( == null) {
            throw new BindingException("headless action");
        return ;
    public void updateView() {
        // noop
    protected void fireAction() {
        // TODO: catch exceptions...
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