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1   /*
2    * $Id: OutboundHeadersAnnotationParser.java 20321 2010-11-24 15:21:24Z dfeist $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  package org.mule.config.parsers;
11  
12  import org.mule.api.annotations.meta.Evaluator;
13  import org.mule.api.annotations.param.OutboundHeaders;
14  import org.mule.api.expression.ExpressionAnnotationParser;
15  import org.mule.expression.ExpressionConfig;
16  import org.mule.expression.transformers.ExpressionArgument;
17  
18  import java.lang.annotation.Annotation;
19  import java.util.Map;
20  
21  /**
22   * Responsible for parsing the {@link org.mule.api.annotations.param.OutboundHeaders} annotation.  This is an iBeans
23   * framework class and cannot be used in any other context.
24   */
25  public class OutboundHeadersAnnotationParser implements ExpressionAnnotationParser
26  {
27      public ExpressionArgument parse(Annotation annotation, Class<?> parameterType)
28      {
29          if(!Map.class.isAssignableFrom(parameterType))
30          {
31              throw new IllegalArgumentException("The @OutboundHeaders annotation can only be set on a java.util.Map parameter");
32          }
33          Evaluator evaluator = annotation.annotationType().getAnnotation(Evaluator.class);
34          if (evaluator != null)
35          {
36              return new ExpressionArgument(null, new ExpressionConfig("", evaluator.value(), null), false);
37          }
38          else
39          {
40              throw new IllegalArgumentException("The @Evaluator annotation must be set on an Expression Annotation");
41          }
42      }
43  
44      public boolean supports(Annotation annotation)
45      {
46          return annotation instanceof OutboundHeaders;
47      }
48  }