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 java.util.Collection; 018 019 import org.apache.tapestry.IActionListener; 020 021 /** 022 * @author Howard M. Lewis Ship 023 */ 024 public interface ListenerMap 025 { 026 /** 027 * Gets a listener for the given name (which is both a property name and a method name). The 028 * listener is created as needed, but is also cached for later use. The returned object 029 * implements the {@link org.apache.tapestry.IActionListener}. 030 * 031 * @param name 032 * the name of the method to invoke (the most appropriate method will be selected if 033 * there are multiple overloadings of the same method name) 034 * @returns an object implementing {@link IActionListener}. 035 * @throws ApplicationRuntimeException 036 * if the listener can not be created. 037 */ 038 public IActionListener getListener(String name); 039 040 /** 041 * Returns an unmodifiable collection of the names of the listeners implemented by the target 042 * class. 043 * 044 * @since 1.0.6 045 */ 046 public Collection getListenerNames(); 047 048 /** 049 * Returns true if this ListenerMapImpl can provide a listener with the given name. 050 * 051 * @since 2.2 052 */ 053 public boolean canProvideListener(String name); 054 }