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: 220   Methods: 9
NCLOC: 120   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
AbstractLinkComponent.java 87.5% 96.2% 88.9% 93.5%
coverage coverage
 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.link;
 16   
 
 17   
 import java.util.ArrayList;
 18   
 import java.util.HashMap;
 19   
 import java.util.Iterator;
 20   
 import java.util.List;
 21   
 import java.util.Map;
 22   
 
 23   
 import org.apache.tapestry.AbstractComponent;
 24   
 import org.apache.tapestry.IMarkupWriter;
 25   
 import org.apache.tapestry.IRequestCycle;
 26   
 import org.apache.tapestry.PageRenderSupport;
 27   
 import org.apache.tapestry.TapestryUtils;
 28   
 import org.apache.tapestry.components.ILinkComponent;
 29   
 import org.apache.tapestry.components.LinkEventType;
 30   
 import org.apache.tapestry.engine.IEngineService;
 31   
 import org.apache.tapestry.engine.ILink;
 32   
 
 33   
 /**
 34   
  * Base class for implementations of {@link ILinkComponent}. Includes a disabled attribute (that
 35   
  * should be bound to a disabled parameter), an anchor attribute, and a renderer attribute (that
 36   
  * should be bound to a renderer parameter). A default, shared instance of
 37   
  * {@link org.apache.tapestry.link.DefaultLinkRenderer}is used when no specific renderer is
 38   
  * provided.
 39   
  * 
 40   
  * @author Howard Lewis Ship
 41   
  */
 42   
 
 43   
 public abstract class AbstractLinkComponent extends AbstractComponent implements ILinkComponent
 44   
 {
 45   
     private Map _eventHandlers;
 46   
 
 47   
     public abstract boolean isDisabled();
 48   
 
 49   
     /**
 50   
      * Adds an event handler (typically, from a wrapped component such as a
 51   
      * {@link org.apache.tapestry.html.Rollover}).
 52   
      */
 53   
 
 54  6
     public void addEventHandler(LinkEventType eventType, String functionName)
 55   
     {
 56  6
         Object currentValue;
 57   
 
 58  6
         if (_eventHandlers == null)
 59  2
             _eventHandlers = new HashMap();
 60   
 
 61  6
         currentValue = _eventHandlers.get(eventType);
 62   
 
 63   
         // The first value is added as a String
 64   
 
 65  6
         if (currentValue == null)
 66   
         {
 67  2
             _eventHandlers.put(eventType, functionName);
 68  2
             return;
 69   
         }
 70   
 
 71   
         // When adding the second value, convert to a List
 72   
 
 73  4
         if (currentValue instanceof String)
 74   
         {
 75  2
             List list = new ArrayList();
 76  2
             list.add(currentValue);
 77  2
             list.add(functionName);
 78   
 
 79  2
             _eventHandlers.put(eventType, list);
 80  2
             return;
 81   
         }
 82   
 
 83   
         // For the third and up, add the new function to the List
 84   
 
 85  2
         List list = (List) currentValue;
 86  2
         list.add(functionName);
 87   
     }
 88   
 
 89   
     /**
 90   
      * Renders the link by delegating to an instance of {@link ILinkRenderer}.
 91   
      */
 92   
 
 93  104
     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
 94   
     {
 95  104
         getRenderer().renderLink(writer, cycle, this);
 96   
     }
 97   
 
 98  104
     protected void cleanupAfterRender(IRequestCycle cycle)
 99   
     {
 100  104
         _eventHandlers = null;
 101   
 
 102  104
         super.cleanupAfterRender(cycle);
 103   
     }
 104   
 
 105  101
     protected void writeEventHandlers(IMarkupWriter writer, IRequestCycle cycle)
 106   
     {
 107  101
         String name = null;
 108   
 
 109  101
         if (_eventHandlers == null)
 110  99
             return;
 111   
 
 112  2
         PageRenderSupport pageRenderSupport = TapestryUtils.getPageRenderSupport(cycle, this);
 113   
 
 114  1
         Iterator i = _eventHandlers.entrySet().iterator();
 115   
 
 116  1
         while (i.hasNext())
 117   
         {
 118  1
             Map.Entry entry = (Map.Entry) i.next();
 119  1
             LinkEventType type = (LinkEventType) entry.getKey();
 120   
 
 121  1
             name = writeEventHandler(
 122   
                     writer,
 123   
                     pageRenderSupport,
 124   
                     name,
 125   
                     type.getAttributeName(),
 126   
                     entry.getValue());
 127   
         }
 128   
 
 129   
     }
 130   
 
 131  1
     protected String writeEventHandler(IMarkupWriter writer, PageRenderSupport pageRenderSupport,
 132   
             String name, String attributeName, Object value)
 133   
     {
 134  1
         String wrapperFunctionName;
 135   
 
 136  1
         if (value instanceof String)
 137   
         {
 138  0
             wrapperFunctionName = (String) value;
 139   
         }
 140   
         else
 141   
         {
 142  1
             String finalName = name == null ? pageRenderSupport.getUniqueString("Link") : name;
 143   
 
 144  1
             wrapperFunctionName = attributeName + "_" + finalName;
 145   
 
 146  1
             StringBuffer buffer = new StringBuffer();
 147   
 
 148  1
             buffer.append("function ");
 149  1
             buffer.append(wrapperFunctionName);
 150  1
             buffer.append(" ()\n{\n");
 151   
 
 152  1
             Iterator i = ((List) value).iterator();
 153  1
             while (i.hasNext())
 154   
             {
 155  3
                 String functionName = (String) i.next();
 156  3
                 buffer.append("  ");
 157  3
                 buffer.append(functionName);
 158  3
                 buffer.append("();\n");
 159   
             }
 160   
 
 161  1
             buffer.append("}\n\n");
 162   
 
 163  1
             pageRenderSupport.addBodyScript(buffer.toString());
 164   
         }
 165   
 
 166  1
         writer.attribute(attributeName, "javascript:" + wrapperFunctionName + "();");
 167   
 
 168  1
         return name;
 169   
     }
 170   
 
 171   
     /** @since 3.0 * */
 172   
 
 173   
     public abstract ILinkRenderer getRenderer();
 174   
 
 175   
     public abstract void setRenderer(ILinkRenderer renderer);
 176   
 
 177  101
     public void renderAdditionalAttributes(IMarkupWriter writer, IRequestCycle cycle)
 178   
     {
 179  101
         writeEventHandlers(writer, cycle);
 180   
 
 181   
         // Generate additional attributes from informal parameters.
 182   
 
 183  100
         renderInformalParameters(writer, cycle);
 184   
     }
 185   
 
 186   
     /**
 187   
      * Utility method for subclasses; Gets the named service from the engine and invokes
 188   
      * {@link IEngineService#getLink(IRequestCycle, org.apache.tapestry.IComponent, Object[])}on
 189   
      * it.
 190   
      * 
 191   
      * @since 3.0
 192   
      * @deprecated To be removed in 4.1; links may now have the necessary engine service injected.
 193   
      */
 194   
 
 195  89
     protected ILink getLink(IRequestCycle cycle, String serviceName, Object parameter)
 196   
     {
 197  89
         IEngineService service = cycle.getEngine().getService(serviceName);
 198   
 
 199  89
         return service.getLink(cycle, parameter);
 200   
     }
 201   
 
 202   
     public abstract String getAnchor();
 203   
 
 204  0
     public ILink getLink(IRequestCycle cycle)
 205   
     {
 206  0
         return null;
 207   
     }
 208   
 
 209   
     /**
 210   
      * Sets the renderer parameter property to its default value
 211   
      * {@link DefaultLinkRenderer#SHARED_INSTANCE}.
 212   
      * 
 213   
      * @since 3.0
 214   
      */
 215  84
     protected void finishLoad()
 216   
     {
 217  84
         setRenderer(DefaultLinkRenderer.SHARED_INSTANCE);
 218   
     }
 219   
 
 220   
 }