AnnotatedBeanDefinitionReader.java

/*
 * Copyright 2002-2009 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
 *
 *      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 org.springframework.context.annotation;

import java.lang.annotation.Annotation;

import org.springframework.beans.factory.annotation.AnnotatedGenericBeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.support.AutowireCandidateQualifier;
import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanNameGenerator;

/**
 * Convenient adapter for programmatic registration of annotated bean classes.
 * This is an alternative to {@link ClassPathBeanDefinitionScanner}, applying
 * the same resolution of annotations but for explicitly registered classes only.
 *
 * @author Juergen Hoeller
 * @since 3.0
 * @see AnnotationConfigApplicationContext#register
 */
public class AnnotatedBeanDefinitionReader {

	private final BeanDefinitionRegistry registry;

	private BeanNameGenerator beanNameGenerator = new AnnotationBeanNameGenerator();

	private ScopeMetadataResolver scopeMetadataResolver = new AnnotationScopeMetadataResolver();


	/**
	 * Create a new AnnotatedBeanDefinitionReader for the given bean factory.
	 * @param registry the BeanFactory to load bean definitions into,
	 * in the form of a BeanDefinitionRegistry
	 */
	public AnnotatedBeanDefinitionReader(BeanDefinitionRegistry registry) {
		this.registry = registry;
		AnnotationConfigUtils.registerAnnotationConfigProcessors(this.registry);
	}


	/**
	 * Return the BeanDefinitionRegistry that this scanner operates on.
	 */
	public final BeanDefinitionRegistry getRegistry() {
		return this.registry;
	}

	/**
	 * Set the BeanNameGenerator to use for detected bean classes.
	 * <p>Default is a {@link AnnotationBeanNameGenerator}.
	 */
	public void setBeanNameGenerator(BeanNameGenerator beanNameGenerator) {
		this.beanNameGenerator = (beanNameGenerator != null ? beanNameGenerator : new AnnotationBeanNameGenerator());
	}

	/**
	 * Set the ScopeMetadataResolver to use for detected bean classes.
	 * <p>The default is an {@link AnnotationScopeMetadataResolver}.
	 */
	public void setScopeMetadataResolver(ScopeMetadataResolver scopeMetadataResolver) {
		this.scopeMetadataResolver = (scopeMetadataResolver != null ? scopeMetadataResolver : new AnnotationScopeMetadataResolver());
	}


	public void register(Class<?>... annotatedClasses) {
		for (Class<?> annotatedClass : annotatedClasses) {
			registerBean(annotatedClass);
		}
	}

	public void registerBean(Class<?> annotatedClass) {
		registerBean(annotatedClass, null, (Class<? extends Annotation>[]) null);
	}

	public void registerBean(Class<?> annotatedClass, Class<? extends Annotation>... qualifiers) {
		registerBean(annotatedClass, null, qualifiers);
	}

	public void registerBean(Class<?> annotatedClass, String name, Class<? extends Annotation>... qualifiers) {
		AnnotatedGenericBeanDefinition abd = new AnnotatedGenericBeanDefinition(annotatedClass);
		ScopeMetadata scopeMetadata = this.scopeMetadataResolver.resolveScopeMetadata(abd);
		abd.setScope(scopeMetadata.getScopeName());
		String beanName = (name != null ? name : this.beanNameGenerator.generateBeanName(abd, this.registry));
		AnnotationConfigUtils.processCommonDefinitionAnnotations(abd);
		if (qualifiers != null) {
			for (Class<? extends Annotation> qualifier : qualifiers) {
				if (Primary.class.equals(qualifier)) {
					abd.setPrimary(true);
				}
				else if (Lazy.class.equals(qualifier)) {
					abd.setLazyInit(true);
				}
				else {
					abd.addQualifier(new AutowireCandidateQualifier(qualifier));
				}
			}
		}
		BeanDefinitionHolder definitionHolder = new BeanDefinitionHolder(abd, beanName);
		definitionHolder = AnnotationConfigUtils.applyScopedProxyMode(scopeMetadata, definitionHolder, this.registry);
		BeanDefinitionReaderUtils.registerBeanDefinition(definitionHolder, this.registry);
	}

}