import org.codelibs.fess.crawler.exception.ExtractException;

/**
 * Extracts text content from Microsoft PowerPoint documents.
 */
public class MsPowerPointExtractor extends AbstractExtractor {

    /**
     * Creates a new MsPowerPointExtractor instance.
     */
    public MsPowerPointExtractor() {
        super();
    }

    /**
     * Extracts text from the PowerPoint input stream.
     * @param in The input stream.

    public MsPowerPointExtractor msPowerPointExtractor;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        StandardCrawlerContainer container = new StandardCrawlerContainer().singleton("msPowerPointExtractor", MsPowerPointExtractor.class);
        msPowerPointExtractor = container.getComponent("msPowerPointExtractor");
    }

    public void test_getText() {

        }
    }

    /**
     * Test that MsPowerPointExtractor properly closes resources on successful extraction.
     */
    public void test_MsPowerPointExtractor_closesResourcesOnSuccess() throws IOException {
        final MsPowerPointExtractor extractor = container.getComponent("msPowerPointExtractor");
        final AtomicBoolean streamClosed = new AtomicBoolean(false);

- Resource closure on failed extraction
- Improved error messages with context
- Input validation using `validateInputStream()`

**Covered Extractors**:
- MsWordExtractor
- MsExcelExtractor
- MsPowerPointExtractor
- TextExtractor

**Test Count**: 8 tests

**Key Scenarios**:
- ✅ Successful extraction closes resources properly
- ✅ Failed extraction includes descriptive error messages
- ✅ Null input stream validation

**Extractor**: Weight-based selection (tries in descending weight order)

### Key Extractors

`TikaExtractor` (1000+ formats), `PdfExtractor`, `MsWordExtractor`, `MsExcelExtractor`, `MsPowerPointExtractor`, `ZipExtractor`, `HtmlExtractor`, etc.

**Registration**:
```java
extractorFactory.addExtractor("text/html", htmlExtractor, 2);  // Weight 2

	<component name="msExcelExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.MsExcelExtractor" />
	<component name="msPowerPointExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.MsPowerPointExtractor" />
	<component name="msPublisherExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.MsPublisherExtractor" />
	<component name="msVisioExtractor"