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10 package org.mule.config.expression;
11
12 import org.mule.api.annotations.expressions.Lookup;
13 import org.mule.api.annotations.meta.Evaluator;
14 import org.mule.api.expression.ExpressionAnnotationParser;
15 import org.mule.expression.ExpressionConfig;
16 import org.mule.expression.transformers.ExpressionArgument;
17 import org.mule.util.StringUtils;
18
19 import java.lang.annotation.Annotation;
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29 public class LookupAnnotationParser implements ExpressionAnnotationParser
30 {
31 public ExpressionArgument parse(Annotation annotation, Class<?> parameterType)
32 {
33 Evaluator evaluator = annotation.annotationType().getAnnotation(Evaluator.class);
34 if (evaluator != null)
35 {
36 String expression = ((Lookup) annotation).value();
37 if(StringUtils.isEmpty(expression))
38 {
39 expression = "type:" + parameterType.getName();
40 }
41 return new ExpressionArgument(null, new ExpressionConfig(expression,
42 evaluator.value(), null), ((Lookup) annotation).optional(), parameterType);
43 }
44 else
45 {
46 throw new IllegalArgumentException("The @Evaluator annotation must be set on an Expression Annotation");
47 }
48
49 }
50
51 public boolean supports(Annotation annotation)
52 {
53 return annotation instanceof Lookup;
54 }
55 }