| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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); |
| } |