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    
015    package org.apache.tapestry5.services.pageload;
016    
017    import 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     */
027    public interface ComponentRequestSelectorAnalyzer
028    {
029        /**
030         * Constructs a selector for locating or loading pages in the current request.
031         */
032        ComponentResourceSelector buildSelectorForRequest();
033    }