OriginLookup (Spring Boot API)

类型参数:
K - the lookup key type
所有已知实现类:
OriginTrackedMapPropertySource, SystemEnvironmentPropertySourceEnvironmentPostProcessor.OriginAwareSystemEnvironmentPropertySource
函数接口:
这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。
```
@FunctionalInterface
public interface OriginLookup<K>
```
An interface that may be implemented by an object that can lookup Origin information from a given key. Can be used to add origin support to existing classes.
从以下版本开始:
2.0.0

方法概要

所有方法静态方法实例方法抽象方法
修饰符和类型	方法	说明
`static <K> Origin`	`getOrigin(Object source, K key)`	Attempt to lookup the origin from the given source.
`Origin`	`getOrigin(K key)`	Return the origin of the given key or `null` if the origin cannot be determined.

- 方法详细资料
  - getOrigin
```
Origin getOrigin(K key)
```
    Return the origin of the given key or null if the origin cannot be determined.
    参数:
    key - the key to lookup
    返回:
    the origin of the key or null
  - getOrigin
```
static <K> Origin getOrigin(Object source,
                            K key)
```
    Attempt to lookup the origin from the given source. If the source is not a OriginLookup or if an exception occurs during lookup then null is returned.
    类型参数:
    K - the key type
    参数:
    source - the source object
    key - the key to lookup
    返回:
    an Origin or null