spring ScannedGenericBeanDefinition 源码
spring ScannedGenericBeanDefinition 代码
文件路径：/spring-context/src/main/java/org/springframework/context/annotation/ScannedGenericBeanDefinition.java
/*
* Copyright 2002-2020 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.context.annotation;
import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
import org.springframework.beans.factory.annotation.AnnotatedGenericBeanDefinition;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.core.type.MethodMetadata;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Extension of the {@link org.springframework.beans.factory.support.GenericBeanDefinition}
* class, based on an ASM ClassReader, with support for annotation metadata exposed
* through the {@link AnnotatedBeanDefinition} interface.
*
* <p>This class does <i>not</i> load the bean {@code Class} early.
* It rather retrieves all relevant metadata from the ".class" file itself,
* parsed with the ASM ClassReader. It is functionally equivalent to
* {@link AnnotatedGenericBeanDefinition#AnnotatedGenericBeanDefinition(AnnotationMetadata)}
* but distinguishes by type beans that have been <em>scanned</em> vs those that have
* been otherwise registered or detected by other means.
*
* @author Juergen Hoeller
* @author Chris Beams
* @since 2.5
* @see #getMetadata()
* @see #getBeanClassName()
* @see org.springframework.core.type.classreading.MetadataReaderFactory
* @see AnnotatedGenericBeanDefinition
*/
@SuppressWarnings("serial")
public class ScannedGenericBeanDefinition extends GenericBeanDefinition implements AnnotatedBeanDefinition {
private final AnnotationMetadata metadata;
/**
* Create a new ScannedGenericBeanDefinition for the class that the
* given MetadataReader describes.
* @param metadataReader the MetadataReader for the scanned target class
*/
public ScannedGenericBeanDefinition(MetadataReader metadataReader) {
Assert.notNull(metadataReader, "MetadataReader must not be null");
this.metadata = metadataReader.getAnnotationMetadata();
setBeanClassName(this.metadata.getClassName());
setResource(metadataReader.getResource());
}
@Override
public final AnnotationMetadata getMetadata() {
return this.metadata;
}
@Override
@Nullable
public MethodMetadata getFactoryMethodMetadata() {
return null;
}
}
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