Coverage report

  %line %branch
org.apache.commons.jelly.tags.core.SetPropertiesTag
68% 
92% 

 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.lang.reflect.InvocationTargetException;
 19  
 import java.util.Map;
 20  
 
 21  
 import org.apache.commons.beanutils.BeanUtils;
 22  
 
 23  
 import org.apache.commons.jelly.JellyException;
 24  
 import org.apache.commons.jelly.JellyTagException;
 25  
 import org.apache.commons.jelly.MissingAttributeException;
 26  
 import org.apache.commons.jelly.MapTagSupport;
 27  
 import org.apache.commons.jelly.XMLOutput;
 28  
 import org.apache.commons.jelly.impl.BeanSource;
 29  
 
 30  
 /**
 31  
  * A tag which sets the bean properties on the given bean.
 32  
  * So if you used it as follows, for example using the <j:new> tag.
 33  
  * <pre>
 34  
  * &lt;j:new className="com.acme.Person" var="person"/&gt;
 35  
  * &lt;j:setProperties object="${person}" name="James" location="${loc}"/&gt;
 36  
  * </pre>
 37  
  * Then it would set the name and location properties on the bean denoted by
 38  
  * the expression ${person}.
 39  
  * <p>
 40  
  * This tag can also be nested inside a bean tag such as the &lt;useBean&gt; tag
 41  
  * or a JellySwing tag to set one or more properties, maybe inside some conditional
 42  
  * logic.
 43  
  *
 44  
  * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
 45  
  * @version $Revision: 155420 $
 46  
  */
 47  
 public class SetPropertiesTag extends MapTagSupport  {
 48  
 
 49  26
     public SetPropertiesTag(){
 50  26
     }
 51  
 
 52  
     // Tag interface
 53  
     //-------------------------------------------------------------------------
 54  
     public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException {
 55  26
         Map attributes = getAttributes();
 56  26
         Object bean = attributes.remove( "object" );
 57  26
         if ( bean == null ) {
 58  
             // lets try find a parent bean
 59  26
             BeanSource tag = (BeanSource) findAncestorWithClass(BeanSource.class);
 60  13
             if (tag != null) {
 61  
                 try {
 62  13
                     bean = tag.getBean();
 63  0
                 } catch (JellyException e) {
 64  0
                     throw new JellyTagException(e);
 65  13
                 }
 66  
             }
 67  13
             if (bean == null) {
 68  0
                 throw new MissingAttributeException("bean");
 69  
             }
 70  
         }
 71  26
         setBeanProperties(bean, attributes);
 72  26
     }
 73  
 
 74  
     // Implementation methods
 75  
     //-------------------------------------------------------------------------
 76  
 
 77  
     /**
 78  
      * Sets the properties on the bean. Derived tags could implement some custom
 79  
      * type conversion etc.
 80  
      */
 81  
     protected void setBeanProperties(Object bean, Map attributes) throws JellyTagException {
 82  
         try {
 83  26
             BeanUtils.populate(bean, attributes);
 84  0
         } catch (IllegalAccessException e) {
 85  0
             throw new JellyTagException("could not set the properties on a bean",e);
 86  0
         } catch (InvocationTargetException e) {
 87  0
             throw new JellyTagException("could not set the properties on a bean",e);
 88  26
         }
 89  26
     }
 90  
 }

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