Coverage report

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org.apache.commons.jelly.tags.core.UseListTag
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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 java.util.ArrayList;
 19  
 import java.util.Iterator;
 20  
 import java.util.List;
 21  
 import java.util.Map;
 22  
 
 23  
 import org.apache.commons.jelly.JellyTagException;
 24  
 import org.apache.commons.jelly.expression.Expression;
 25  
 import org.apache.commons.jelly.impl.CollectionTag;
 26  
 
 27  
 /**
 28  
  * A tag which creates a List implementation and optionally
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  * adds all of the elements identified by the items attribute.
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  * The exact implementation of List can be specified via the
 31  
  * class attribute
 32  
  * </pre>
 33  
  *
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  * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
 35  
  * @version $Revision: 1.3 $
 36  
  */
 37  0
 public class UseListTag extends UseBeanTag implements CollectionTag {
 38  
 
 39  
     private Expression items;
 40  
 
 41  0
     public UseListTag(){
 42  0
     }
 43  
 
 44  
     public List getList() {
 45  0
         return (List) getBean();
 46  
     }
 47  
 
 48  
 
 49  
     // CollectionTag interface
 50  
     //-------------------------------------------------------------------------
 51  
     public void addItem(Object value) {
 52  0
         getList().add(value);
 53  0
     }
 54  
 
 55  
     // DynaTag interface
 56  
     //-------------------------------------------------------------------------
 57  
     public Class getAttributeType(String name) throws JellyTagException {
 58  0
         if (name.equals("items")) {
 59  0
             return Expression.class;
 60  
         }
 61  0
         return super.getAttributeType(name);
 62  
     }
 63  
 
 64  
 
 65  
     // Implementation methods
 66  
     //-------------------------------------------------------------------------
 67  
 
 68  
     protected void setBeanProperties(Object bean, Map attributes) throws JellyTagException {
 69  0
         items = (Expression) attributes.remove("items");
 70  0
         super.setBeanProperties(bean, attributes);
 71  0
     }
 72  
 
 73  
     protected void processBean(String var, Object bean) throws JellyTagException {
 74  0
         super.processBean(var, bean);
 75  
 
 76  0
         List list = getList();
 77  
 
 78  
         // if the items variable is specified lets append all the items
 79  0
         if (items != null) {
 80  0
             Iterator iter = items.evaluateAsIterator(context);
 81  0
             while (iter.hasNext()) {
 82  0
                 list.add( iter.next() );
 83  
             }
 84  
         }
 85  0
     }
 86  
 
 87  
     protected Class getDefaultClass() {
 88  0
         return ArrayList.class;
 89  
     }
 90  
 }

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