    001// Copyright 2007, 2008 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.tapestry5.services;
    016
    017import java.io.IOException;
    018
    019/**
    020 * Filter interface for {@link PageRenderRequestHandler}, which allows extra behaviors to be injected into the
    021 * processing of a page render request.
    022 */
    023public interface PageRenderRequestFilter
    024{
    025    /**
    026     * Invoked to activate and render a page. The return value of the event handler method(s) for the activate event may
    027     * result in an action response generator being returned.
    028     *
    029     * @param parameters defines the page name and activation context
    030     * @param handler    to delegate the invocation to
    031     */
    032    void handle(PageRenderRequestParameters parameters, PageRenderRequestHandler handler) throws IOException;
    033}