NullSourceExtractor (Spring Framework 3.2.1.RELEASE API)
Date: 2013-01-24

org.springframework.beans.factory.parsing

## Class NullSourceExtractor

- 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 and Description
    `NullSourceExtractor()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and 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`)