/*
 * 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 GenericBeanDefinition class, based on an ASM ClassReader, with support for annotation metadata exposed through the AnnotatedBeanDefinition interface. 
This class does not load the bean Class early. It rather retrieves all relevant metadata from the ".class" file itself, parsed with the ASM ClassReader. It is functionally equivalent to 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, Chris Beams
See Also:
getMetadata()
AbstractBeanDefinition.getBeanClassName()
MetadataReaderFactory
AnnotatedGenericBeanDefinition
Since:
2.5/**
 * 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.
Params:
metadataReader – the MetadataReader for the scanned target class/**
	 * 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;
	}

}