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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.specific;
8   
9   import org.mule.config.spring.parsers.delegate.ParentContextDefinitionParser;
10  import org.mule.config.spring.parsers.generic.ChildDefinitionParser;
11  import org.mule.config.spring.parsers.generic.MuleOrphanDefinitionParser;
12  import org.mule.config.spring.parsers.processors.CheckExclusiveAttributesAndChildren;
13  import org.mule.config.spring.parsers.processors.CheckRequiredAttributesWhenNoChildren;
14  import org.mule.expression.ExpressionConfig;
15  import org.mule.expression.transformers.ExpressionArgument;
16  
17  import org.springframework.beans.factory.support.BeanDefinitionBuilder;
18  import org.springframework.beans.factory.support.GenericBeanDefinition;
19  import org.springframework.beans.factory.support.ManagedList;
20  import org.springframework.beans.factory.xml.ParserContext;
21  import org.w3c.dom.Element;
22  
23  /**
24   * This allows a message processor to be defined globally, or embedded within an
25   * endpoint. (as either a normal or response processor).
26   */
27  public class ExpressionTransformerDefinitionParser extends ParentContextDefinitionParser
28  {
29  
30      public ExpressionTransformerDefinitionParser(Class messageProcessor)
31      {
32          super(MuleOrphanDefinitionParser.ROOT_ELEMENT, new ExpressionTransformerOrphanDefinitionParser(
33              messageProcessor, false));
34          otherwise(new ExpressionTransformerChildDefinitionParser("messageProcessor", messageProcessor));
35  
36          registerPreProcessor(
37              new CheckRequiredAttributesWhenNoChildren(new String[][]{{"evaluator", "expression"}},
38                  "return-argument")).registerPreProcessor(
39              new CheckExclusiveAttributesAndChildren(new String[]{"evaluator", "expression"},
40                  new String[]{"return-argument"}))
41              .addIgnored("evaluator")
42              .addIgnored("expression")
43              .addIgnored("custom-evaluator");
44      }
45  
46      protected static void addExpressionArgumentFromAttributes(Element element, BeanDefinitionBuilder builder)
47      {
48          if (element.getAttributeNode("expression") != null)
49          {
50              GenericBeanDefinition objectFactoryBeanDefinition = new GenericBeanDefinition();
51              objectFactoryBeanDefinition.setBeanClass(ExpressionArgument.class);
52              objectFactoryBeanDefinition.getPropertyValues().addPropertyValue("name", "single");
53              objectFactoryBeanDefinition.getPropertyValues().addPropertyValue("optional", false);
54              GenericBeanDefinition objectFactoryBeanDefinition2 = new GenericBeanDefinition();
55              objectFactoryBeanDefinition2.setBeanClass(ExpressionConfig.class);
56              objectFactoryBeanDefinition2.getPropertyValues().addPropertyValue("evaluator",
57                  element.getAttribute("evaluator"));
58              objectFactoryBeanDefinition2.getPropertyValues().addPropertyValue("customEvaluator",
59                  element.getAttribute("custom-evaluator"));
60              objectFactoryBeanDefinition2.getPropertyValues().addPropertyValue("expression",
61                  element.getAttribute("expression"));
62              objectFactoryBeanDefinition.getPropertyValues().addPropertyValue("expressionConfig",
63                  objectFactoryBeanDefinition2);
64              ManagedList list = new ManagedList<ExpressionArgument>(1);
65              list.add(objectFactoryBeanDefinition2);
66              builder.getBeanDefinition().getPropertyValues().addPropertyValue("arguments",
67                  objectFactoryBeanDefinition);
68          }
69      }
70  
71      static class ExpressionTransformerChildDefinitionParser extends ChildDefinitionParser
72      {
73  
74          public ExpressionTransformerChildDefinitionParser(String string, Class messageProcessor)
75          {
76              super(string, messageProcessor);
77          }
78  
79          @Override
80          protected void parseChild(Element element, ParserContext parserContext, BeanDefinitionBuilder builder)
81          {
82              addExpressionArgumentFromAttributes(element, builder);
83              super.parseChild(element, parserContext, builder);
84          }
85      };
86  
87      static class ExpressionTransformerOrphanDefinitionParser extends MuleOrphanDefinitionParser
88      {
89  
90          public ExpressionTransformerOrphanDefinitionParser(Class<?> beanClass, boolean singleton)
91          {
92              super(beanClass, singleton);
93          }
94  
95          @Override
96          protected void doParse(Element element, ParserContext context, BeanDefinitionBuilder builder)
97          {
98              addExpressionArgumentFromAttributes(element, builder);
99              super.doParse(element, context, builder);
100         }
101     };
102 
103 }