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.IActionListener; 018 import org.apache.tapestry.IComponent; 019 import org.apache.tapestry.IRequestCycle; 020 021 /** 022 * Filter interface used with 023 * {@link org.apache.tapestry.listener.ListenerInvoker}. Implementations of 024 * this filter interface may be plugged into the listener method invocation 025 * pipeline. Typical applications involve handling transactions. 026 * 027 * @author Howard M. Lewis Ship 028 * @since 4.0 029 */ 030 public interface ListenerInvokerFilter 031 { 032 033 /** 034 * Invoked when a particular listener is being called. 035 * 036 * @param listener The listener reference being invoked. 037 * @param source The component the listener is being invoked on. 038 * @param cycle The associated request. 039 * @param delegate The delegate responsible for actually invoking the method. 040 */ 041 void invokeListener(IActionListener listener, IComponent source, IRequestCycle cycle, ListenerInvoker delegate); 042 }