View Javadoc
1   /*
2    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
3    * The software in this package is published under the terms of the CPAL v1.0
4    * license, a copy of which has been included with this distribution in the
5    * LICENSE.txt file.
6    */
7   package org.mule.config.spring.parsers;
8   
9   import org.mule.util.ClassUtils;
10  import org.mule.util.StringUtils;
11  
12  import org.springframework.beans.MutablePropertyValues;
13  import org.springframework.beans.factory.config.RuntimeBeanReference;
14  import org.springframework.beans.factory.support.AbstractBeanDefinition;
15  import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
16  import org.springframework.beans.factory.xml.ParserContext;
17  import org.w3c.dom.Element;
18  
19  public class ClassOrRefDefinitionParser extends AbstractBeanDefinitionParser
20  {
21      private String propertyName;
22  
23      public ClassOrRefDefinitionParser(String propertyName)
24      {
25          super();
26          
27          if (StringUtils.isEmpty(propertyName))
28          {
29              throw new IllegalArgumentException("propertyName cannot be null");
30          }
31          this.propertyName = propertyName;
32      }
33      
34      @Override
35      protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext)
36      {
37          MutablePropertyValues parentProps = parserContext.getContainingBeanDefinition().getPropertyValues();
38  
39          String ref = element.getAttribute(AbstractMuleBeanDefinitionParser.ATTRIBUTE_REF);
40          String className = element.getAttribute(AbstractMuleBeanDefinitionParser.ATTRIBUTE_CLASS);
41  
42          if (StringUtils.isBlank(ref) && StringUtils.isBlank(className))
43          {
44              String elementName = element.getLocalName();
45              throw new IllegalArgumentException("Neither ref nor class attribute specified for the "
46                  + elementName + " element");
47          }
48          
49          if (StringUtils.isNotBlank(ref))
50          {
51              // add a ref to other bean
52              parentProps.addPropertyValue(propertyName, new RuntimeBeanReference(ref));
53          }
54          else
55          {
56              // class attributed specified, instantiate and set directly
57              Object instance;
58              try
59              {
60                  instance = ClassUtils.instanciateClass(className, ClassUtils.NO_ARGS, getClass());
61              }
62              catch (Exception e)
63              {
64                  throw new RuntimeException(e);
65              }
66  
67              parentProps.addPropertyValue(propertyName, instance);
68          }
69  
70          return null;
71      }
72  }
73  
74