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10 package org.mule.config.parsers;
11
12 import org.mule.api.annotations.meta.Evaluator;
13 import org.mule.api.annotations.param.InboundHeaders;
14 import org.mule.api.expression.ExpressionAnnotationParser;
15 import org.mule.expression.ExpressionConfig;
16 import org.mule.expression.MessageHeaderExpressionEvaluator;
17 import org.mule.expression.MessageHeadersExpressionEvaluator;
18 import org.mule.expression.MessageHeadersListExpressionEvaluator;
19 import org.mule.expression.transformers.ExpressionArgument;
20
21 import java.lang.annotation.Annotation;
22 import java.util.List;
23 import java.util.Map;
24
25 import static org.mule.expression.ExpressionConstants.OPTIONAL_ARGUMENT;
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30
31 public class InboundHeadersAnnotationParser implements ExpressionAnnotationParser
32 {
33 public ExpressionArgument parse(Annotation annotation, Class<?> parameterType)
34 {
35 Evaluator evaluator = annotation.annotationType().getAnnotation(Evaluator.class);
36
37 if (evaluator != null)
38 {
39 String expr = ((InboundHeaders) annotation).value();
40
41 boolean optional = false;
42 String eval = MessageHeaderExpressionEvaluator.NAME;
43 if (parameterType.isAssignableFrom(Map.class))
44 {
45 eval = MessageHeadersExpressionEvaluator.NAME;
46 }
47 else if (parameterType.isAssignableFrom(List.class))
48 {
49 eval = MessageHeadersListExpressionEvaluator.NAME;
50 }
51 else if (expr.endsWith(OPTIONAL_ARGUMENT))
52 {
53
54
55 optional = true;
56 }
57 return new ExpressionArgument(null, new ExpressionConfig("INBOUND:" + expr, eval, null), optional, parameterType);
58 }
59 else
60 {
61 throw new IllegalArgumentException("The @Evaluator annotation must be set on an Expression Annotation");
62 }
63 }
64
65 public boolean supports(Annotation annotation)
66 {
67 return annotation instanceof InboundHeaders;
68 }
69 }