Clover coverage report - Code Coverage for tapestry release 4.0-alpha-3
Coverage timestamp: Mon May 16 2005 09:05:49 EDT
file stats: LOC: 126   Methods: 4
NCLOC: 65   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
ListenerBinding.java - 95% 75% 91.7%
coverage coverage
 1   
 // Copyright 2004, 2005 The Apache Software Foundation
 2   
 //
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 // Licensed under the Apache License, Version 2.0 (the "License");
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 // you may not use this file except in compliance with the License.
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 // You may obtain a copy of the License at
 6   
 //
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 //     http://www.apache.org/licenses/LICENSE-2.0
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 //
 9   
 // Unless required by applicable law or agreed to in writing, software
 10   
 // distributed under the License is distributed on an "AS IS" BASIS,
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 // 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.binding;
 16   
 
 17   
 import org.apache.bsf.BSFException;
 18   
 import org.apache.bsf.BSFManager;
 19   
 import org.apache.hivemind.ApplicationRuntimeException;
 20   
 import org.apache.hivemind.Location;
 21   
 import org.apache.hivemind.util.Defense;
 22   
 import org.apache.tapestry.IActionListener;
 23   
 import org.apache.tapestry.IComponent;
 24   
 import org.apache.tapestry.IEngine;
 25   
 import org.apache.tapestry.IPage;
 26   
 import org.apache.tapestry.IRequestCycle;
 27   
 import org.apache.tapestry.Tapestry;
 28   
 import org.apache.tapestry.coerce.ValueConverter;
 29   
 import org.apache.tapestry.services.BSFManagerFactory;
 30   
 
 31   
 /**
 32   
  * A very specialized binding that can be used as an {@link org.apache.tapestry.IActionListener},
 33   
  * executing a script in a scripting language, via <a href="http://jakarta.apache.org/bsf">Bean
 34   
  * Scripting Framework </a>.
 35   
  * 
 36   
  * @author Howard Lewis Ship
 37   
  * @since 3.0
 38   
  */
 39   
 
 40   
 public class ListenerBinding extends AbstractBinding implements IActionListener
 41   
 {
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     private final String _language;
 43   
 
 44   
     private final String _script;
 45   
 
 46   
     private final IComponent _component;
 47   
 
 48   
     /** @since 4.0 */
 49   
 
 50   
     private BSFManagerFactory _managerFactory;
 51   
 
 52  4
     public ListenerBinding(String description, ValueConverter valueConverter, Location location,
 53   
             IComponent component, String language, String script,
 54   
             BSFManagerFactory managerFactory)
 55   
     {
 56  4
         super(description, valueConverter, location);
 57   
 
 58  4
         Defense.notNull(component, "component");
 59  4
         Defense.notNull(language, "language");
 60  4
         Defense.notNull(script, "script");
 61   
 
 62  4
         _component = component;
 63  4
         _language = language;
 64  4
         _script = script;
 65  4
         _managerFactory = managerFactory;
 66   
     }
 67   
 
 68   
     /**
 69   
      * Returns this.
 70   
      */
 71   
 
 72  4
     public Object getObject()
 73   
     {
 74  4
         return this;
 75   
     }
 76   
 
 77   
     /**
 78   
      * A ListenerBinding is also a {@link org.apache.tapestry.IActionListener}. It registers a
 79   
      * number of beans with the BSF manager and invokes the script.
 80   
      * <p>
 81   
      * Registers the following bean:
 82   
      * <ul>
 83   
      * <li>component - the relevant {@link IComponent}, typically the same as the page
 84   
      * <li>page - the {@link IPage}trigged by the request (obtained by
 85   
      * {@link IRequestCycle#getPage()}
 86   
      * <li>cycle - the {@link IRequestCycle}, from which can be found the {@link IEngine}, etc.
 87   
      * </ul>
 88   
      */
 89   
 
 90  4
     public void actionTriggered(IComponent component, IRequestCycle cycle)
 91   
     {
 92  4
         BSFManager bsf = _managerFactory.createBSFManager();
 93   
 
 94  4
         Location location = getLocation();
 95   
 
 96  4
         try
 97   
         {
 98  4
             IPage page = cycle.getPage();
 99   
 
 100  4
             bsf.declareBean("component", _component, _component.getClass());
 101  4
             bsf.declareBean("page", page, page.getClass());
 102  4
             bsf.declareBean("cycle", cycle, cycle.getClass());
 103   
 
 104  4
             bsf.exec(
 105   
                     _language,
 106   
                     location.getResource().toString(),
 107   
                     location.getLineNumber(),
 108   
                     location.getLineNumber(),
 109   
                     _script);
 110   
         }
 111   
         catch (BSFException ex)
 112   
         {
 113  2
             String message = Tapestry.format("ListenerBinding.bsf-exception", location, ex
 114   
                     .getMessage());
 115   
 
 116  2
             throw new ApplicationRuntimeException(message, _component, getLocation(), ex);
 117   
         }
 118   
     }
 119   
 
 120   
     /** @since 4.0 */
 121   
 
 122  0
     public Object getComponent()
 123   
     {
 124  0
         return _component;
 125   
     }
 126   
 }