/**
* 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(); }