NullSourceExtractor (Spring Framework 4.3.30.RELEASE API)

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

All Implemented Interfaces:
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.
Since:
2.0
Author:
Rob Harrop

Constructor Summary
Constructors
Constructor Description
NullSourceExtractor()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`extractSource(Object sourceCandidate, Resource definitionResource)`	This implementation simply returns `null` for any input.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NullSourceExtractor
```
public NullSourceExtractor()
```
- Method Detail
  - extractSource
```
public Object extractSource(Object sourceCandidate,
                            Resource definitionResource)
```
    This implementation simply returns null for any input.
    Specified by:
    extractSource in interface SourceExtractor
    Parameters:
    sourceCandidate - the original source metadata (never null)
    definitionResource - the resource that defines the given source object (may be null)
    Returns:
    the source metadata object to store (may be null)