Coverage Report - org.apache.tapestry.components.Conditional
 
Classes in this File Line Coverage Branch Coverage Complexity
Conditional
0%
0/12
0%
0/12
1.8
 
 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.
 24  
  * 
 25  
  * @author Howard Lewis Ship, David Solis
 26  
  */
 27  
 
 28  0
 public abstract class Conditional extends AbstractComponent
 29  
 {
 30  
     /**
 31  
      * Renders its wrapped components only if the condition is true (technically, if condition
 32  
      * matches invert). Additionally, if element is specified, can emulate that HTML element if
 33  
      * condition is met
 34  
      */
 35  
 
 36  
     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
 37  
     {
 38  0
         if (evaluateCondition())
 39  
         {
 40  0
             String element = getElement();
 41  
 
 42  0
             boolean render = !cycle.isRewinding() && HiveMind.isNonBlank(element);
 43  
 
 44  0
             if (render)
 45  
             {
 46  0
                 writer.begin(element);
 47  0
                 renderInformalParameters(writer, cycle);
 48  
             }
 49  
 
 50  0
             renderBody(writer, cycle);
 51  
 
 52  0
             if (render)
 53  0
                 writer.end(element);
 54  
         }
 55  0
     }
 56  
 
 57  
     protected boolean evaluateCondition()
 58  
     {
 59  0
         return getCondition() != getInvert();
 60  
     }
 61  
 
 62  
     public abstract boolean getCondition();
 63  
 
 64  
     public abstract boolean getInvert();
 65  
 
 66  
     public abstract String getElement();
 67  
 }