spring AnnotationClassFilter 源码
spring AnnotationClassFilter 代码
文件路径：/spring-aop/src/main/java/org/springframework/aop/support/annotation/AnnotationClassFilter.java
/*
* Copyright 2002-2022 the original author or authors.
*
* 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
*
* https://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 org.springframework.aop.support.annotation;
import java.lang.annotation.Annotation;
import org.springframework.aop.ClassFilter;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Simple ClassFilter that looks for a specific annotation being present on a class.
*
* @author Juergen Hoeller
* @since 2.0
* @see AnnotationMatchingPointcut
*/
public class AnnotationClassFilter implements ClassFilter {
private final Class<? extends Annotation> annotationType;
private final boolean checkInherited;
/**
* Create a new AnnotationClassFilter for the given annotation type.
* @param annotationType the annotation type to look for
*/
public AnnotationClassFilter(Class<? extends Annotation> annotationType) {
this(annotationType, false);
}
/**
* Create a new AnnotationClassFilter for the given annotation type.
* @param annotationType the annotation type to look for
* @param checkInherited whether to also check the superclasses and
* interfaces as well as meta-annotations for the annotation type
* (i.e. whether to use {@link AnnotatedElementUtils#hasAnnotation}
* semantics instead of standard Java {@link Class#isAnnotationPresent})
*/
public AnnotationClassFilter(Class<? extends Annotation> annotationType, boolean checkInherited) {
Assert.notNull(annotationType, "Annotation type must not be null");
this.annotationType = annotationType;
this.checkInherited = checkInherited;
}
@Override
public boolean matches(Class<?> clazz) {
return (this.checkInherited ? AnnotatedElementUtils.hasAnnotation(clazz, this.annotationType) :
clazz.isAnnotationPresent(this.annotationType));
}
@Override
public boolean equals(@Nullable Object other) {
if (this == other) {
return true;
}
if (!(other instanceof AnnotationClassFilter otherCf)) {
return false;
}
return (this.annotationType.equals(otherCf.annotationType) && this.checkInherited == otherCf.checkInherited);
}
@Override
public int hashCode() {
return this.annotationType.hashCode();
}
@Override
public String toString() {
return getClass().getName() + ": " + this.annotationType;
}
}
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