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/*
 * 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.
 *
 * 

This class does not 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 scanned 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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