org.apache.shiro.spring.aop.SpringAnnotationResolver Maven / Gradle / Ivy
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package org.apache.shiro.spring.aop;
import org.apache.shiro.aop.AnnotationResolver;
import org.apache.shiro.aop.MethodInvocation;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.util.ClassUtils;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
/**
* {@code AnnotationResolver} implementation that uses Spring's more robust
* {@link AnnotationUtils AnnotationUtils} to find method annotations instead of the JDKs simpler
* (and rather lacking) {@link Method}.{@link Method#getAnnotation(Class) getAnnotation(class)}
* implementation.
*
* @since 1.1
*/
public class SpringAnnotationResolver implements AnnotationResolver {
public Annotation getAnnotation(MethodInvocation mi, Class clazz) {
Method m = mi.getMethod();
Annotation a = AnnotationUtils.findAnnotation(m, clazz);
if (a != null) return a;
//The MethodInvocation's method object could be a method defined in an interface.
//However, if the annotation existed in the interface's implementation (and not
//the interface itself), it won't be on the above method object. Instead, we need to
//acquire the method representation from the targetClass and check directly on the
//implementation itself:
Class targetClass = mi.getThis().getClass();
m = ClassUtils.getMostSpecificMethod(m, targetClass);
a = AnnotationUtils.findAnnotation(m, clazz);
if (a != null) return a;
// See if the class has the same annotation
return AnnotationUtils.findAnnotation(mi.getThis().getClass(), clazz);
}
}