001// Copyright 2005 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 015package org.apache.tapestry.event; 016 017import java.util.EventListener; 018 019/** 020 * Event listener for determining when a page is about to start rendering. Rendering includes the 021 * replay of a form to handle form submissions. 022 * 023 * @author Howard M. Lewis Ship 024 * @since 4.0 025 */ 026public interface PageBeginRenderListener extends EventListener 027{ 028 /** 029 * Invoked before just before the page renders a response. This provides listeners with a last 030 * chance to initialize themselves for the render. This initialization can include modifying 031 * peristent page properties. 032 */ 033 034 public void pageBeginRender(PageEvent event); 035}