package org.springframework.beans.factory;

/**
 * Sub-interface implemented by bean factories that can be part
 * of a hierarchy.
 * 
 * 可以被作為分層結構中的一部分的bean工廠實現
 *
 * <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.
 * 
 * 那些允許以配置的方式設定其父工廠的bean工廠對應的方法setParentBeanFactory可以在介面setParentBeanFactory
 * 中找到
 *
 * @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.
     * 返回其父工廠，如果沒有返回Null
     */
 

    BeanFactory getParentBeanFactory();

    /**
     * Return whether the local bean factory contains a bean of the given name,
     * ignoring beans defined in ancestor contexts.
     * 
     * 返回當前bean工廠上下文是否存在給定bean名字的bean，忽略定義在其繼承層次中的工廠上下文。
     * 
     * <p>This is an alternative to {@code containsBean}, ignoring a bean
     * of the given name from an ancestor bean factory.
     * 
     * containsBean方法與此方法是二選一的，都忽略其繼承層次中的bean定義，只在當前層次中查詢 
     * 
     * @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
     */
    boolean containsLocalBean(String name);

}