    001    // Copyright 2010, 2011 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    // http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.services;
    016
    017    import org.apache.tapestry5.runtime.Component;
    018    import org.apache.tapestry5.runtime.ComponentEvent;
    019
    020    /**
    021     * Interface used with  {@link org.apache.tapestry5.services.transform.TransformationSupport#addEventHandler(String, int, String, ComponentEventHandler)}} (and, in the old
    022     * API, {@link ClassTransformation#addComponentEventHandler(String, int, String, ComponentEventHandler)}).
    023     *
    024     * @since 5.2.0
    025     */
    026    public interface ComponentEventHandler
    027    {
    028        /**
    029         * Handles the event.
    030         */
    031        void handleEvent(Component instance, ComponentEvent event);
    032    }