    001// Copyright 2006 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 javax.servlet.http.HttpServletRequest;
    018import javax.servlet.http.HttpServletResponse;
    019import java.io.IOException;
    020
    021/**
    022 * Filter interface for {@link org.apache.tapestry5.services.HttpServletRequestHandler}.
    023 */
    024public interface HttpServletRequestFilter
    025{
    026    /**
    027     * Filter interface for the HttpServletRequestHandler pipeline. A filter should delegate to the handler. It may
    028     * perform operations before or after invoking the handler, and may modify the request and response passed in to the
    029     * handler.
    030     *
    031     * @return true if the request has been handled, false otherwise
    032     */
    033    boolean service(HttpServletRequest request, HttpServletResponse response, HttpServletRequestHandler handler)
    034            throws IOException;
    035}