spring源码 RootBeanDefinition类的根接口AttributeAccessor

/**
 * Interface defining a generic contract for attaching and accessing metadata
 * to/from arbitrary objects.
 *定义用于附加和访问元数据的通用的接口，来自任意对象
 * @author Rob Harrop
 * @since 2.0
 */
public interface AttributeAccessor {
 
    /**
     * Set the attribute defined by {@code name} to the supplied    {@code value}.
  　　将name的属性值设置为value*/
    void setAttribute(String name, Object value);
 
    /**
     * Get the value of the attribute identified by {@code name}.
     * Return {@code null} if the attribute doesn't exist.
　　　获取name的属性值，如果该属性不存在，则返回Null*/
    Object getAttribute(String name);
 
    /**
     * Remove the attribute identified by {@code name} and return its value.
     * Return {@code null} if no attribute under {@code name} is found.
 　　　　删除name的属性值，如果找不到Nmae属性的值则返回Null*/
    Object removeAttribute(String name);
 
    /**
     * Return {@code true} if the attribute identified by {@code name} exists.
　　　　如果name属性值存在则返回true，否者返回false*/
    boolean hasAttribute(String name);
 
    /**
     * Return the names of all attributes.
　　　　返回所有的属性名称
     */
    String[] attributeNames();
 
}