Coverage Report - org.apache.tapestry.components.Conditional
 
Classes in this File Line Coverage Branch Coverage Complexity
Conditional
100% 
100% 
1.6
 
 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.components;
 16  
 
 17  
 import org.apache.hivemind.HiveMind;
 18  
 import org.apache.tapestry.AbstractComponent;
 19  
 import org.apache.tapestry.IMarkupWriter;
 20  
 import org.apache.tapestry.IRequestCycle;
 21  
 
 22  
 /**
 23  
  * A conditional element on a page which will render its wrapped elements zero or one times. [ <a
 24  
  * href="../../../../../ComponentReference/Conditional.html">Component Reference </a>]
 25  
  * 
 26  
  * @author Howard Lewis Ship, David Solis
 27  
  */
 28  
 
 29  5
 public abstract class Conditional extends AbstractComponent
 30  
 {
 31  
     /**
 32  
      * Renders its wrapped components only if the condition is true (technically, if condition
 33  
      * matches invert). Additionally, if element is specified, can emulate that HTML element if
 34  
      * condition is met
 35  
      */
 36  
 
 37  
     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
 38  
     {
 39  5
         if (evaluateCondition())
 40  
         {
 41  3
             String element = getElement();
 42  
 
 43  3
             boolean render = !cycle.isRewinding() && HiveMind.isNonBlank(element);
 44  
 
 45  3
             if (render)
 46  
             {
 47  1
                 writer.begin(element);
 48  1
                 renderInformalParameters(writer, cycle);
 49  
             }
 50  
 
 51  3
             renderBody(writer, cycle);
 52  
 
 53  3
             if (render)
 54  1
                 writer.end(element);
 55  
         }
 56  5
     }
 57  
 
 58  
     protected boolean evaluateCondition()
 59  
     {
 60  5
         return getCondition() != getInvert();
 61  
     }
 62  
 
 63  
     public abstract boolean getCondition();
 64  
 
 65  
     public abstract boolean getInvert();
 66  
 
 67  
     public abstract String getElement();
 68  
 }