NullSourceExtractor (Spring Framework 4.3.30.RELEASE API)

java.lang.Object
- org.springframework.beans.factory.parsing.NullSourceExtractor

所有已实现的接口:
SourceExtractor
```
public class NullSourceExtractor
extends Object
implements SourceExtractor
```
Simple implementation of SourceExtractor that returns null as the source metadata.
This is the default implementation and prevents too much metadata from being held in memory during normal (non-tooled) runtime usage.
从以下版本开始:
2.0
作者:
Rob Harrop

构造器概要
构造器
构造器说明
NullSourceExtractor()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`Object`	`extractSource(Object sourceCandidate, Resource definitionResource)`	This implementation simply returns `null` for any input.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - NullSourceExtractor
```
public NullSourceExtractor()
```
- 方法详细资料
  - extractSource
```
public Object extractSource(Object sourceCandidate,
                            Resource definitionResource)
```
    This implementation simply returns null for any input.
    指定者:
    extractSource 在接口中 SourceExtractor
    参数:
    sourceCandidate - the original source metadata (never null)
    definitionResource - the resource that defines the given source object (may be null)
    返回:
    the source metadata object to store (may be null)