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Support for meta-annotations ryantenney#163
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aheil
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Jan 25, 2016
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src/main/java/com/ryantenney/metrics/spring/AnnotationClassOrMethodPointcut.java
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| @@ -0,0 +1,100 @@ | ||
| /** | ||
| * Copyright (C) 2012 Ryan W Tenney ([email protected]) | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.ryantenney.metrics.spring; | ||
|
|
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| import java.lang.annotation.Annotation; | ||
| import java.lang.reflect.Method; | ||
| import java.util.concurrent.atomic.AtomicBoolean; | ||
| import org.springframework.aop.MethodMatcher; | ||
| import org.springframework.aop.support.StaticMethodMatcherPointcut; | ||
| import org.springframework.aop.support.annotation.AnnotationClassFilter; | ||
| import org.springframework.aop.support.annotation.AnnotationMethodMatcher; | ||
| import org.springframework.core.annotation.AnnotationUtils; | ||
| import org.springframework.util.ReflectionUtils; | ||
|
|
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| /** | ||
| Based on spring retry (org.springframework.retry.annotation.RetryConfiguration). | ||
| */ | ||
| public class AnnotationClassOrMethodPointcut extends StaticMethodMatcherPointcut { | ||
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| private final MethodMatcher methodResolver; | ||
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| AnnotationClassOrMethodPointcut(Class<? extends Annotation> annotationType) { | ||
| this.methodResolver = new AnnotationMethodMatcher(annotationType); | ||
| setClassFilter(new AnnotationClassOrMethodFilter(annotationType)); | ||
| } | ||
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| @Override | ||
| public boolean matches(Method method, Class<?> targetClass) { | ||
| return getClassFilter().matches(targetClass) || this.methodResolver.matches(method, targetClass); | ||
| } | ||
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| private static final class AnnotationClassOrMethodFilter extends AnnotationClassFilter { | ||
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| private final AnnotationMethodsResolver methodResolver; | ||
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| AnnotationClassOrMethodFilter(Class<? extends Annotation> annotationType) { | ||
| super(annotationType, true); | ||
| this.methodResolver = new AnnotationMethodsResolver(annotationType); | ||
| } | ||
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| @Override | ||
| public boolean matches(Class<?> clazz) { | ||
| return super.matches(clazz) || this.methodResolver.hasAnnotatedMethods(clazz); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object other) { | ||
|
|
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| return super.equals(other); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
|
|
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| return super.hashCode(); | ||
| } | ||
| } | ||
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| private static class AnnotationMethodsResolver { | ||
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| private Class<? extends Annotation> annotationType; | ||
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| public AnnotationMethodsResolver(Class<? extends Annotation> annotationType) { | ||
| this.annotationType = annotationType; | ||
| } | ||
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| public boolean hasAnnotatedMethods(Class<?> clazz) { | ||
| final AtomicBoolean found = new AtomicBoolean(false); | ||
| ReflectionUtils.doWithMethods(clazz, | ||
| new ReflectionUtils.MethodCallback() { | ||
| @Override | ||
| public void doWith(Method method) throws IllegalArgumentException, | ||
| IllegalAccessException { | ||
| if (found.get()) { | ||
| return; | ||
| } | ||
| Annotation annotation = AnnotationUtils.findAnnotation(method, | ||
| annotationType); | ||
| if (annotation != null) { found.set(true); } | ||
| } | ||
| }); | ||
| return found.get(); | ||
| } | ||
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| } | ||
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| } |
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