001// Copyright 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
015package org.apache.tapestry5.services.pageload;
016
017import org.apache.tapestry5.ioc.services.ThreadLocale;
018
019/**
020 * Determines the {@link ComponentResourceSelector} for the current request. This is often based on cookies, query
021 * parameters, or other details available in the {@link org.apache.tapestry5.services.Request}. The default implementation simply wraps the
022 * {@linkplain ThreadLocale current locale} as a ComponentResourceSelector. A custom implementation may
023 * {@linkplain ComponentResourceSelector#withAxis(Class, Object) add additional axes} to the selector.
024 * 
025 * @since 5.3
026 */
027public interface ComponentRequestSelectorAnalyzer
028{
029    /**
030     * Constructs a selector for locating or loading pages in the current request.
031     */
032    ComponentResourceSelector buildSelectorForRequest();
033}