ComponentScanAnnotationParser.java 文件源码

/**
 * Invoke {@link ResourceLoaderAware}, {@link BeanClassLoaderAware} and
 * {@link BeanFactoryAware} contracts if implemented by the given {@code filter}.
 */
private void invokeAwareMethods(TypeFilter filter) {
    if (filter instanceof Aware) {
        if (filter instanceof EnvironmentAware) {
            ((EnvironmentAware) filter).setEnvironment(this.environment);
        }
        if (filter instanceof ResourceLoaderAware) {
            ((ResourceLoaderAware) filter).setResourceLoader(this.resourceLoader);
        }
        if (filter instanceof BeanClassLoaderAware) {
            ClassLoader classLoader = (this.registry instanceof ConfigurableBeanFactory ?
                    ((ConfigurableBeanFactory) this.registry).getBeanClassLoader() :
                    this.resourceLoader.getClassLoader());
            ((BeanClassLoaderAware) filter).setBeanClassLoader(classLoader);
        }
        if (filter instanceof BeanFactoryAware && this.registry instanceof BeanFactory) {
            ((BeanFactoryAware) filter).setBeanFactory((BeanFactory) this.registry);
        }
    }
}