| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ViewControllerCallbacks |
|
| 3.0;3 |
| 1 | /* | |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
| 3 | * contributor license agreements. See the NOTICE file distributed with | |
| 4 | * this work for additional information regarding copyright ownership. | |
| 5 | * The ASF licenses this file to you under the Apache License, Version 2.0 | |
| 6 | * (the "License"); you may not use this file except in compliance with | |
| 7 | * the License. You may obtain a copy of the License at | |
| 8 | * | |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 | * | |
| 11 | * Unless required by applicable law or agreed to in writing, software | |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 | * See the License for the specific language governing permissions and | |
| 15 | * limitations under the License. | |
| 16 | */ | |
| 17 | ||
| 18 | package org.apache.shale.view.faces; | |
| 19 | ||
| 20 | import javax.faces.context.FacesContext; | |
| 21 | import org.apache.shale.view.Constants; | |
| 22 | import org.apache.shale.view.ExceptionHandler; | |
| 23 | import org.apache.shale.view.ViewController; | |
| 24 | ||
| 25 | /** | |
| 26 | * <p>Utility class to perform the event callbacks specified by the | |
| 27 | * {@link ViewController} interface. The method signatures make it | |
| 28 | * possible to specialize the behavior for annotated callbacks in the | |
| 29 | * <em>Shale Tiger Extensions</em> module.</p> | |
| 30 | * | |
| 31 | * @since 1.0.1 | |
| 32 | * | |
| 33 | * $Id: ViewControllerCallbacks.java 464373 2006-10-16 04:21:54Z rahul $ | |
| 34 | */ | |
| 35 | 2 | public class ViewControllerCallbacks { |
| 36 | ||
| 37 | ||
| 38 | // ------------------------------------------------------------ Constructors | |
| 39 | ||
| 40 | ||
| 41 | // ------------------------------------------------------ Instance Variables | |
| 42 | ||
| 43 | ||
| 44 | // ---------------------------------------------------------- Public Methods | |
| 45 | ||
| 46 | ||
| 47 | /** | |
| 48 | * <p>Perform the <code>preprocess</code> callback on the specified | |
| 49 | * instance.</p> | |
| 50 | * | |
| 51 | * @param instance Bean instance on which to perform this callback | |
| 52 | */ | |
| 53 | public void preprocess(Object instance) { | |
| 54 | ||
| 55 | 1 | if (instance instanceof ViewController) { |
| 56 | try { | |
| 57 | 1 | ((ViewController) instance).preprocess(); |
| 58 | } catch (Exception e) { | |
| 59 | handleException(FacesContext.getCurrentInstance(), e); | |
| 60 | 1 | } |
| 61 | } | |
| 62 | ||
| 63 | 1 | } |
| 64 | ||
| 65 | ||
| 66 | /** | |
| 67 | * <p>Perform the <code>prerender</code> callback on the specified | |
| 68 | * instance.</p> | |
| 69 | * | |
| 70 | * @param instance Bean instance on which to perform this callback | |
| 71 | */ | |
| 72 | public void prerender(Object instance) { | |
| 73 | ||
| 74 | 1 | if (instance instanceof ViewController) { |
| 75 | try { | |
| 76 | 1 | ((ViewController) instance).prerender(); |
| 77 | } catch (Exception e) { | |
| 78 | handleException(FacesContext.getCurrentInstance(), e); | |
| 79 | 1 | } |
| 80 | } | |
| 81 | ||
| 82 | 1 | } |
| 83 | ||
| 84 | ||
| 85 | // ------------------------------------------------------- Protected Methods | |
| 86 | ||
| 87 | ||
| 88 | /** | |
| 89 | * <p>Handle the specified exception according to the strategy | |
| 90 | * defined by our current {@link ExceptionHandler}.</p> | |
| 91 | * | |
| 92 | * @param context FacesContext for the current request | |
| 93 | * @param exception Exception to be handled | |
| 94 | */ | |
| 95 | protected void handleException(FacesContext context, Exception exception) { | |
| 96 | ||
| 97 | if (context == null) { | |
| 98 | exception.printStackTrace(System.out); | |
| 99 | return; | |
| 100 | } | |
| 101 | ExceptionHandler handler = (ExceptionHandler) | |
| 102 | context.getApplication().getVariableResolver().resolveVariable | |
| 103 | (context, Constants.EXCEPTION_HANDLER); | |
| 104 | handler.handleException(exception); | |
| 105 | ||
| 106 | } | |
| 107 | ||
| 108 | ||
| 109 | } |