Groovy example source code file (EventTriggerBinding.java)

This example Groovy source code file (EventTriggerBinding.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

closure, eventtriggerbinding, eventtriggerfullbinding, eventtriggerfullbinding, fullbinding, object, object, sourcebinding, sourcebinding, string, string, targetbinding, triggerbinding, unsupportedoperationexception

The Groovy EventTriggerBinding.java source code

/*
 * Copyright 2007 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 org.codehaus.groovy.binding;

import groovy.lang.Closure;
import org.codehaus.groovy.runtime.InvokerHelper;

/**
 * @author <a href="mailto:shemnon@yahoo.com">Danno Ferrin
 * @version $Revision: 21237 $
 * @since Groovy 1.1
 */
public class EventTriggerBinding implements TriggerBinding {

    Object triggerBean;
    String eventName;

    public EventTriggerBinding(Object triggerBean, String eventName) {
        this.triggerBean = triggerBean;
        this.eventName = eventName;
    }

    public FullBinding createBinding(final SourceBinding sourceBinding, final TargetBinding targetBinding) {
        return new EventTriggerFullBinding(sourceBinding, targetBinding);
    }

    public Object getTriggerBean() {
        return triggerBean;
    }

    public void setTriggerBean(Object triggerBean) {
        this.triggerBean = triggerBean;
    }

    public String getEventName() {
        return eventName;
    }

    public void setEventName(String eventName) {
        this.eventName = eventName;
    }

    private class EventTriggerFullBinding extends AbstractFullBinding {

        Closure handler;

        public EventTriggerFullBinding(final SourceBinding sourceBinding, TargetBinding targetBinding) {
            setSourceBinding(sourceBinding);
            setTargetBinding(targetBinding);
            handler = new Closure(triggerBean) {
                public Object call(Object... params) {
                    if (sourceBinding instanceof ClosureSourceBinding) {
                        ((ClosureSourceBinding)sourceBinding).setClosureArguments(params);
                    }
                    update();
                    return null;
                }
            };
        }

        public void bind() {
            InvokerHelper.setProperty(triggerBean, eventName, handler);
        }

        public void unbind() {
            throw new UnsupportedOperationException();
        }

        public void rebind() {
            throw new UnsupportedOperationException();
        }
    }
}