/**

 * Sub-interface implemented by bean factories that can be part

 * of a hierarchy.

 *

 * <p>The corresponding {@code setParentBeanFactory} method for bean

 * factories that allow setting the parent in a configurable

 * fashion can be found in the ConfigurableBeanFactory interface.

 *

 * @author Rod Johnson

 * @author Juergen Hoeller

 * @since 07.07.2003

 * @see org.springframework.beans.factory.config.ConfigurableBeanFactory#setParentBeanFactory

 */

public interface HierarchicalBeanFactory extends BeanFactory {

    /**

     * Return the parent bean factory, or {@code null} if there is none.

     */

    //返回本Bean工厂的父工厂

    BeanFactory getParentBeanFactory();

    /**

     * Return whether the local bean factory contains a bean of the given name,

     * ignoring beans defined in ancestor contexts.

     * <p>This is an alternative to {@code containsBean}, ignoring a bean

     * of the given name from an ancestor bean factory.

     * @param name the name of the bean to query

     * @return whether a bean with the given name is defined in the local factory

     * @see BeanFactory#containsBean

     */

     //本地工厂(容器)是否包含这个Bean

    boolean containsLocalBean(String name);

}