Coverage report

  %line %branch
org.apache.commons.jelly.tags.core.SwitchTag
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 1  
 /*
 2  
  * Copyright 2002,2004 The Apache Software Foundation.
 3  
  *
 4  
  * Licensed under the Apache License, Version 2.0 (the "License");
 5  
  * you may not use this file except in compliance with the License.
 6  
  * You may obtain a copy of the License at
 7  
  *
 8  
  *      http://www.apache.org/licenses/LICENSE-2.0
 9  
  *
 10  
  * Unless required by applicable law or agreed to in writing, software
 11  
  * distributed under the License is distributed on an "AS IS" BASIS,
 12  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13  
  * See the License for the specific language governing permissions and
 14  
  * limitations under the License.
 15  
  */
 16  
 package org.apache.commons.jelly.tags.core;
 17  
 
 18  
 import org.apache.commons.jelly.JellyTagException;
 19  
 import org.apache.commons.jelly.MissingAttributeException;
 20  
 import org.apache.commons.jelly.TagSupport;
 21  
 import org.apache.commons.jelly.XMLOutput;
 22  
 import org.apache.commons.jelly.expression.Expression;
 23  
 
 24  
 
 25  
 /**
 26  
  * Executes the child <case> tag whose value equals my on attribute.
 27  
  * Executes a child <default> tag when present and no <case> tag has
 28  
  * yet matched.
 29  
  *
 30  
  * @see CaseTag
 31  
  * @see DefaultTag
 32  
  *
 33  
  * @author Rodney Waldhoff
 34  
  * @version $Revision: 1.7 $ $Date: 2004/09/09 12:27:53 $
 35  
  */
 36  
 public class SwitchTag extends TagSupport {
 37  
 
 38  28
     public SwitchTag() {
 39  28
     }
 40  
 
 41  
     // Tag interface
 42  
     //-------------------------------------------------------------------------
 43  
 
 44  
     /**
 45  
      * Sets the value to switch on.
 46  
      * Note that the {@link Expression} is evaluated only once, when the
 47  
      * <switch> tag is evaluated.
 48  
      * @param on the value to switch on
 49  
      */
 50  
     public void setOn(Expression on) {
 51  26
         this.on = on;
 52  26
     }
 53  
 
 54  
     public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException {
 55  28
         if(null == on) {
 56  2
             throw new MissingAttributeException("on");
 57  
         } else {
 58  26
             value = on.evaluate(context);
 59  26
             invokeBody(output);
 60  
         }
 61  20
     }
 62  
 
 63  
     // Protected properties
 64  
     //-------------------------------------------------------------------------
 65  
     protected boolean hasSomeCaseMatched() {
 66  24
         return this.someCaseMatched;
 67  
     }
 68  
 
 69  
     protected void caseMatched() {
 70  26
         this.someCaseMatched = true;
 71  26
     }
 72  
 
 73  
     protected boolean isFallingThru() {
 74  106
         return this.fallingThru;
 75  
     }
 76  
 
 77  
     protected void setFallingThru(boolean fallingThru) {
 78  26
         this.fallingThru = fallingThru;
 79  26
     }
 80  
 
 81  
     protected Object getValue() {
 82  170
         return value;
 83  
     }
 84  
 
 85  
     protected boolean hasDefaultBeenEncountered() {
 86  110
         return defaultEncountered;
 87  
     }
 88  
 
 89  
     protected void defaultEncountered() {
 90  24
         this.defaultEncountered = true;
 91  24
     }
 92  
 
 93  
     // Attributes
 94  
     //-------------------------------------------------------------------------
 95  28
     private boolean someCaseMatched = false;
 96  28
     private boolean fallingThru = false;
 97  28
     private boolean defaultEncountered = false;
 98  28
     private Expression on = null;
 99  28
     private Object value = null;
 100  
 
 101  
 }

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