| /* |
| * Copyright 2002-2006,2009 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.opensymphony.xwork2; |
| |
| import com.opensymphony.xwork2.util.ValueStack; |
| |
| /** |
| * Provides hooks for handling key action events |
| */ |
| public interface ActionEventListener { |
| /** |
| * Called after an action has been created. |
| * |
| * @param action The action |
| * @param stack The current value stack |
| * @return The action to use |
| */ |
| public Object prepare(Object action, ValueStack stack); |
| |
| /** |
| * Called when an exception is thrown by the action |
| * |
| * @param t The exception/error that was thrown |
| * @param stack The current value stack |
| * @return A result code to execute, can be null |
| */ |
| public String handleException(Throwable t, ValueStack stack); |
| } |