Coverage Report - org.apache.tapestry.callback.DirectCallback
 
Classes in this File Line Coverage Branch Coverage Complexity
DirectCallback
0%
0/26
0%
0/6
2.667
 
 1  
 // Copyright 2004, 2005 The Apache Software Foundation
 2  
 //
 3  
 // Licensed under the Apache License, Version 2.0 (the "License");
 4  
 // you may not use this file except in compliance with the License.
 5  
 // You may obtain a copy of the License at
 6  
 //
 7  
 //     http://www.apache.org/licenses/LICENSE-2.0
 8  
 //
 9  
 // Unless required by applicable law or agreed to in writing, software
 10  
 // distributed under the License is distributed on an "AS IS" BASIS,
 11  
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12  
 // See the License for the specific language governing permissions and
 13  
 // limitations under the License.
 14  
 
 15  
 package org.apache.tapestry.callback;
 16  
 
 17  
 import org.apache.hivemind.ApplicationRuntimeException;
 18  
 import org.apache.hivemind.util.Defense;
 19  
 import org.apache.tapestry.IComponent;
 20  
 import org.apache.tapestry.IDirect;
 21  
 import org.apache.tapestry.IPage;
 22  
 import org.apache.tapestry.IRequestCycle;
 23  
 
 24  
 /**
 25  
  * Simple callback for re-invoking a {@link IDirect} trigger.
 26  
  * 
 27  
  * @author Howard Lewis Ship
 28  
  * @since 0.2.9
 29  
  */
 30  
 
 31  
 public class DirectCallback implements ICallback
 32  
 {
 33  
     /**
 34  
      * @since 2.0.4
 35  
      */
 36  
 
 37  
     private static final long serialVersionUID = -8888847655917503471L;
 38  
 
 39  
     private String _pageName;
 40  
 
 41  
     private String _componentIdPath;
 42  
 
 43  
     private Object[] _parameters;
 44  
 
 45  
     /**
 46  
      * Creates a new DirectCallback for the component. The parameters (which may be null) is
 47  
      * retained, not copied.
 48  
      */
 49  
 
 50  
     public DirectCallback(IDirect component, Object[] parameters)
 51  0
     {
 52  0
         Defense.notNull(component, "component");
 53  
 
 54  0
         _pageName = component.getPage().getPageName();
 55  0
         _componentIdPath = component.getIdPath();
 56  0
         _parameters = parameters;
 57  0
     }
 58  
     
 59  
     public String toString()
 60  
     {
 61  0
         StringBuffer buffer = new StringBuffer("DirectCallback[");
 62  
 
 63  0
         buffer.append(_pageName);
 64  0
         buffer.append('/');
 65  0
         buffer.append(_componentIdPath);
 66  
 
 67  0
         if (_parameters != null)
 68  
         {
 69  0
             for (int i = 0; i < _parameters.length; i++)
 70  
             {
 71  0
                 buffer.append(i == 0 ? " " : ", ");
 72  0
                 buffer.append(_parameters[i]);
 73  
             }
 74  
         }
 75  
 
 76  0
         buffer.append(']');
 77  
 
 78  0
         return buffer.toString();
 79  
 
 80  
     }
 81  
 
 82  
     /**
 83  
      * Locates the {@link IDirect}component that was previously identified (and whose page and id
 84  
      * path were stored). Invokes {@link IRequestCycle#setListenerParameters(Object[]) (Object[])} to
 85  
      * restore the service parameters, then invokes {@link IDirect#trigger(IRequestCycle)}on the
 86  
      * component.
 87  
      */
 88  
 
 89  
     public void performCallback(IRequestCycle cycle)
 90  
     {
 91  0
         IPage page = cycle.getPage(_pageName);
 92  0
         IComponent component = page.getNestedComponent(_componentIdPath);
 93  0
         IDirect direct = null;
 94  
 
 95  
         try
 96  
         {
 97  0
             direct = (IDirect) component;
 98  
         }
 99  0
         catch (ClassCastException ex)
 100  
         {
 101  0
             throw new ApplicationRuntimeException(CallbackMessages.componentNotDirect(component),
 102  
                     component, null, ex);
 103  0
         }
 104  
 
 105  0
         cycle.setListenerParameters(_parameters);
 106  0
         direct.trigger(cycle);
 107  0
     }
 108  
 }