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: 187   Methods: 4
NCLOC: 100   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
ListEdit.java 87.5% 87.5% 75% 86.7%
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.form;
 16   
 
 17   
 import java.io.IOException;
 18   
 import java.util.Iterator;
 19   
 
 20   
 import org.apache.hivemind.ApplicationRuntimeException;
 21   
 import org.apache.tapestry.IActionListener;
 22   
 import org.apache.tapestry.IForm;
 23   
 import org.apache.tapestry.IMarkupWriter;
 24   
 import org.apache.tapestry.IRequestCycle;
 25   
 import org.apache.tapestry.Tapestry;
 26   
 import org.apache.tapestry.coerce.ValueConverter;
 27   
 import org.apache.tapestry.listener.ListenerInvoker;
 28   
 import org.apache.tapestry.services.DataSqueezer;
 29   
 
 30   
 /**
 31   
  * A specialized component used to edit a list of items within a form; it is similar to a
 32   
  * {@link org.apache.tapestry.components.Foreach}but leverages hidden inputs within the
 33   
  * &lt;form&gt; to store the items in the list. [ <a
 34   
  * href="../../../../../ComponentReference/ListEdit.html">Component Reference </a>]
 35   
  * 
 36   
  * @author Howard Lewis Ship
 37   
  * @since 1.0.2
 38   
  */
 39   
 
 40   
 public abstract class ListEdit extends AbstractFormComponent
 41   
 {
 42  5
     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
 43   
     {
 44  5
         Iterator i = null;
 45   
 
 46  5
         IForm form = getForm(cycle);
 47   
 
 48  5
         boolean cycleRewinding = cycle.isRewinding();
 49   
 
 50   
         // If the cycle is rewinding, but not this particular form,
 51   
         // then do nothing (don't even render the body).
 52   
 
 53  5
         if (cycleRewinding && !form.isRewinding())
 54  0
             return;
 55   
 
 56  5
         String name = form.getElementId(this);
 57   
 
 58  5
         boolean indexBound = isParameterBound("index");
 59   
 
 60  5
         if (!cycleRewinding)
 61   
         {
 62  3
             i = getSource();
 63   
         }
 64   
         else
 65   
         {
 66  2
             String[] submittedValues = cycle.getParameters(name);
 67   
 
 68  2
             i = (Iterator) getValueConverter().coerceValue(submittedValues, Iterator.class);
 69   
         }
 70   
 
 71   
         // If the source (when rendering), or the submitted values (on submit)
 72   
         // are null, then skip the remainder (nothing to update, nothing to
 73   
         // render).
 74   
 
 75  5
         if (i == null)
 76  0
             return;
 77   
 
 78  5
         int index = 0;
 79   
 
 80  5
         String element = getElement();
 81   
 
 82  5
         while (i.hasNext())
 83   
         {
 84  10
             Object value = null;
 85   
 
 86  10
             if (indexBound)
 87  3
                 setIndex(index++);
 88   
 
 89  10
             if (cycleRewinding)
 90  4
                 value = convertValue((String) i.next());
 91   
             else
 92   
             {
 93  6
                 value = i.next();
 94  6
                 writeValue(form, name, value);
 95   
             }
 96   
 
 97  9
             setValue(value);
 98   
 
 99  9
             getListenerInvoker().invokeListener(getListener(), this, cycle);
 100   
 
 101  9
             if (element != null)
 102   
             {
 103  6
                 writer.begin(element);
 104  6
                 renderInformalParameters(writer, cycle);
 105   
             }
 106   
 
 107  9
             renderBody(writer, cycle);
 108   
 
 109  9
             if (element != null)
 110  6
                 writer.end();
 111   
 
 112   
         }
 113   
     }
 114   
 
 115  6
     private void writeValue(IForm form, String name, Object value)
 116   
     {
 117  6
         String externalValue;
 118   
 
 119  6
         try
 120   
         {
 121  6
             externalValue = getDataSqueezer().squeeze(value);
 122   
         }
 123   
         catch (IOException ex)
 124   
         {
 125  0
             throw new ApplicationRuntimeException(Tapestry.format(
 126   
                     "ListEdit.unable-to-convert-value",
 127   
                     value), this, null, ex);
 128   
         }
 129   
 
 130  6
         form.addHiddenValue(name, externalValue);
 131   
     }
 132   
 
 133  4
     private Object convertValue(String value)
 134   
     {
 135  4
         try
 136   
         {
 137  4
             return getDataSqueezer().unsqueeze(value);
 138   
         }
 139   
         catch (IOException ex)
 140   
         {
 141  0
             throw new ApplicationRuntimeException(Tapestry.format(
 142   
                     "ListEdit.unable-to-convert-string",
 143   
                     value), this, null, ex);
 144   
         }
 145   
     }
 146   
 
 147   
     public abstract String getElement();
 148   
 
 149   
     /** @since 2.2 * */
 150   
 
 151   
     public abstract IActionListener getListener();
 152   
 
 153   
     /** @since 3.0 * */
 154   
 
 155  0
     public boolean isDisabled()
 156   
     {
 157  0
         return false;
 158   
     }
 159   
 
 160   
     /** @since 4.0 */
 161   
 
 162   
     public abstract Iterator getSource();
 163   
 
 164   
     /** @since 4.0 */
 165   
 
 166   
     public abstract void setValue(Object value);
 167   
 
 168   
     /** @since 4.0 */
 169   
 
 170   
     public abstract void setIndex(int index);
 171   
 
 172   
     /** @since 4.0 */
 173   
 
 174   
     public abstract DataSqueezer getDataSqueezer();
 175   
 
 176   
     /** @since 4.0 */
 177   
 
 178   
     public abstract ValueConverter getValueConverter();
 179   
 
 180   
     /**
 181   
      * Injected.
 182   
      * 
 183   
      * @since 4.0
 184   
      */
 185   
 
 186   
     public abstract ListenerInvoker getListenerInvoker();
 187   
 }