Clover coverage report - Code Coverage for tapestry-contrib release 4.0-alpha-3
Coverage timestamp: Mon May 16 2005 09:12:41 EDT
file stats: LOC: 161   Methods: 5
NCLOC: 93   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
FormConditional.java 0% 0% 0% 0%
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.contrib.form;
 16   
 
 17   
 import java.io.IOException;
 18   
 
 19   
 import org.apache.hivemind.ApplicationRuntimeException;
 20   
 import org.apache.hivemind.HiveMind;
 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.form.AbstractFormComponent;
 27   
 import org.apache.tapestry.listener.ListenerInvoker;
 28   
 import org.apache.tapestry.services.DataSqueezer;
 29   
 
 30   
 /**
 31   
  * A conditional element on a page which will render its wrapped elements zero or one times. This
 32   
  * component is a variant of {@link org.apache.tapestry.components.Conditional}, but is designed
 33   
  * for operation in a form. The component parameters are stored in hidden fields during rendering
 34   
  * and are taken from those fields during the rewind, thus no StaleLink exceptions occur. [ <a
 35   
  * href="../../../../../ComponentReference/contrib.FormConditional.html">Component Reference </a>]
 36   
  * 
 37   
  * @author Mindbridge
 38   
  * @since 3.0
 39   
  */
 40   
 
 41   
 public abstract class FormConditional extends AbstractFormComponent
 42   
 {
 43   
 
 44  0
     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
 45   
     {
 46  0
         IForm form = getForm(cycle);
 47   
 
 48  0
         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  0
         if (cycleRewinding && !form.isRewinding())
 54  0
             return;
 55   
 
 56  0
         String name = form.getElementId(this);
 57   
 
 58  0
         boolean condition = getCondition(cycle, form, name);
 59   
 
 60  0
         getListenerInvoker().invokeListener(getListener(), this, cycle);
 61   
 
 62   
         // render the component body only if the condition is true
 63  0
         if (condition)
 64   
         {
 65  0
             String element = getElement();
 66   
 
 67  0
             boolean render = !cycleRewinding && HiveMind.isNonBlank(element);
 68   
 
 69  0
             if (render)
 70   
             {
 71  0
                 writer.begin(element);
 72  0
                 renderInformalParameters(writer, cycle);
 73   
             }
 74   
 
 75  0
             renderBody(writer, cycle);
 76   
 
 77  0
             if (render)
 78  0
                 writer.end(element);
 79   
         }
 80   
     }
 81   
 
 82  0
     private boolean getCondition(IRequestCycle cycle, IForm form, String name)
 83   
     {
 84  0
         boolean condition;
 85   
 
 86  0
         if (!cycle.isRewinding())
 87   
         {
 88  0
             condition = getCondition();
 89  0
             writeValue(form, name, condition);
 90   
         }
 91   
         else
 92   
         {
 93  0
             String submittedCondition = cycle.getParameter(name);
 94  0
             condition = convertValue(submittedCondition);
 95   
         }
 96   
 
 97  0
         if (isParameterBound("conditionValue"))
 98  0
             setConditionValue(condition);
 99   
 
 100  0
         return condition;
 101   
     }
 102   
 
 103  0
     private void writeValue(IForm form, String name, boolean value)
 104   
     {
 105  0
         String externalValue;
 106   
 
 107  0
         try
 108   
         {
 109  0
             externalValue = getDataSqueezer().squeeze(value ? Boolean.TRUE : Boolean.FALSE);
 110   
         }
 111   
         catch (IOException ex)
 112   
         {
 113  0
             throw new ApplicationRuntimeException(Tapestry.format(
 114   
                     "FormConditional.unable-to-convert-value",
 115   
                     Boolean.toString(value)), this, null, ex);
 116   
         }
 117   
 
 118  0
         form.addHiddenValue(name, externalValue);
 119   
     }
 120   
 
 121  0
     private boolean convertValue(String value)
 122   
     {
 123  0
         try
 124   
         {
 125  0
             Boolean b = (Boolean) getDataSqueezer().unsqueeze(value);
 126  0
             return b.booleanValue();
 127   
         }
 128   
         catch (IOException ex)
 129   
         {
 130  0
             throw new ApplicationRuntimeException(Tapestry.format(
 131   
                     "FormConditional.unable-to-convert-string",
 132   
                     value), this, null, ex);
 133   
         }
 134   
     }
 135   
 
 136   
     public abstract DataSqueezer getDataSqueezer();
 137   
 
 138   
     // Part of the FormElement interface.
 139   
 
 140  0
     public boolean isDisabled()
 141   
     {
 142  0
         return false;
 143   
     }
 144   
 
 145   
     public abstract boolean getCondition();
 146   
 
 147   
     public abstract void setConditionValue(boolean value);
 148   
 
 149   
     public abstract String getElement();
 150   
 
 151   
     public abstract IActionListener getListener();
 152   
 
 153   
     /**
 154   
      * Injected.
 155   
      * 
 156   
      * @since 4.0
 157   
      */
 158   
 
 159   
     public abstract ListenerInvoker getListenerInvoker();
 160   
 
 161   
 }