SourceExtractor (Spring Framework 5.2.12.RELEASE API)

所有已知实现类:
NullSourceExtractor, PassThroughSourceExtractor
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 SourceExtractor
```
Simple strategy allowing tools to control how source metadata is attached to the bean definition metadata.
Configuration parsers may provide the ability to attach source metadata during the parse phase. They will offer this metadata in a generic format which can be further modified by a SourceExtractor before being attached to the bean definition metadata.
从以下版本开始:
2.0
作者:
Rob Harrop, Juergen Hoeller
另请参阅:
BeanMetadataElement.getSource(), BeanDefinition

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`Object`	`extractSource(Object sourceCandidate, Resource definingResource)`	Extract the source metadata from the candidate object supplied by the configuration parser.

- 方法详细资料
  - extractSource
```
@Nullable
Object extractSource(Object sourceCandidate,
                     @Nullable
                     Resource definingResource)
```
    Extract the source metadata from the candidate object supplied by the configuration parser.
    参数:
    sourceCandidate - the original source metadata (never null)
    definingResource - the resource that defines the given source object (may be null)
    返回:
    the source metadata object to store (may be null)