001    // Copyright 2004, 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    
015    package org.apache.tapestry.services;
016    
017    import org.apache.tapestry.IEngine;
018    import org.apache.tapestry.IRequestCycle;
019    
020    /**
021     * A factory for creating instances of {@link org.apache.tapestry.IRequestCycle}for
022     * the current request.
023     * 
024     * @author Howard M. Lewis Ship
025     * @since 4.0
026     */
027    public interface RequestCycleFactory
028    {
029    
030        /**
031         * Constructs the new instance using the request context. This includes
032         * accessing {@link org.apache.tapestry.engine.ServiceEncoder}s to restore
033         * any missing query parameters (that were encoding into the URL).
034         */
035    
036        IRequestCycle newRequestCycle(IEngine engine);
037    }