| // Copyright 2006, 2008 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 org.apache.tapestry.internal.util; |
| |
| import org.apache.tapestry.ComponentEventCallback; |
| |
| /** |
| * A {@link org.apache.tapestry.ComponentEventCallback} used for notification events. Event handler methods may return |
| * true (to abort the event) or false (to allow the event to continue bubbling up), but all other values are forbidden. |
| */ |
| public class NotificationEventCallback implements ComponentEventCallback |
| { |
| private final String eventType; |
| |
| private final String completeId; |
| |
| public NotificationEventCallback(String eventType, String completeId) |
| { |
| this.eventType = eventType; |
| this.completeId = completeId; |
| } |
| |
| public boolean handleResult(Object result) |
| { |
| if (result instanceof Boolean) return ((Boolean) result); |
| |
| throw new IllegalArgumentException( |
| UtilMessages.noReturnValueAccepted(eventType, completeId, result)); |
| } |
| |
| } |