001    // Copyright 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.listener;
016    
017    import org.apache.tapestry.IRequestCycle;
018    
019    /**
020     * An object, used by a {@link org.apache.tapestry.listener.ListenerMap}, to match requests
021     * (possibly with service parameters) to methods (possibly with arguments). Given a request, a
022     * (possibly null or empty) array of service parameters, and a target object (and its set of public
023     * void methods), the mapping will search for the mostly likely mapping. In order:
024     * <ul>
025     * <li>public void method(params) (where the method takes the same number of parameters as there
026     * are service parameters)
027     * <li>public void method(IRequestCycle, params)
028     * <li>public void method()
029     * <li>public void method(IRequestCycle)
030     * </ul>
031     * 
032     * @author Howard M. Lewis Ship
033     * @since 4.0
034     */
035    public interface ListenerMethodInvoker
036    {
037        public void invokeListenerMethod(Object target, IRequestCycle cycle);
038    }