Coverage report

  %line %branch
org.apache.commons.jelly.tags.core.CaseTag
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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  
  * A tag which conditionally evaluates its body if
 26  
  * my {@link #setValue value} attribute equals my ancestor
 27  
  * {@link SwitchTag <switch>} tag's
 28  
  * {@link SwitchTag#setOn "on"} attribute.
 29  
  *
 30  
  * This tag must be contained within the body of some
 31  
  * {@link SwitchTag <switch>} tag.
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  *
 33  
  * @see SwitchTag
 34  
  *
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  * @author Rodney Waldhoff
 36  
  * @version $Revision: 155420 $ $Date: 2005-02-27 00:06:03 +1100 (Sun, 27 Feb 2005) $
 37  
  */
 38  
 public class CaseTag extends TagSupport {
 39  
 
 40  598
     public CaseTag() {
 41  598
     }
 42  
 
 43  
     // Tag interface
 44  
     //-------------------------------------------------------------------------
 45  
     public void setValue(Expression value) {
 46  611
         this.valueExpression = value;
 47  611
     }
 48  
 
 49  
     public void setFallThru(boolean fallThru) {
 50  130
         this.fallThru = fallThru;
 51  130
     }
 52  
 
 53  
     public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException {
 54  624
         if(null == this.valueExpression) {
 55  13
             throw new MissingAttributeException("value");
 56  
         }
 57  624
         SwitchTag tag = (SwitchTag)findAncestorWithClass(SwitchTag.class);
 58  611
         if(null == tag) {
 59  13
             throw new JellyTagException("This tag must be enclosed inside a <switch> tag" );
 60  
         }
 61  598
         if(tag.hasDefaultBeenEncountered()) {
 62  13
             throw new JellyTagException("<default> should be the last tag within a <switch>" );
 63  
         }
 64  585
         Object value = valueExpression.evaluate(context);
 65  585
         if(tag.isFallingThru() ||
 66  
            (null == tag.getValue() && class="keyword">null == value) ||
 67  
            (null != tag.getValue() && tag.getValue().equals(value))) {
 68  130
             tag.caseMatched();
 69  130
             tag.setFallingThru(fallThru);
 70  130
             invokeBody(output);
 71  
         }
 72  585
     }
 73  
 
 74  
     // Attributes
 75  
     //-------------------------------------------------------------------------
 76  598
     private Expression valueExpression = null;
 77  598
     private boolean fallThru = false;
 78  
 
 79  
 }

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