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   this work for additional information regarding copyright ownership.
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   (the "License"); you may not use this file except in compliance with
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package org.apache.poi.extractor;

import org.apache.poi.POIDocument;
import org.apache.poi.hpsf.DocumentSummaryInformation;
import org.apache.poi.hpsf.SummaryInformation;
import org.apache.poi.hpsf.extractor.HPSFPropertiesExtractor;
import org.apache.poi.poifs.filesystem.DirectoryEntry;

Common Parent for OLE2 based Text Extractors
 of POI Documents, such as .doc, .xls
You will typically find the implementation of
 a given format's text extractor under
 org.apache.poi.[format].extractor .
See Also:
ExcelExtractor
PowerPointExtractor
VisioTextExtractor
WordExtractor/**
 * Common Parent for OLE2 based Text Extractors
 *  of POI Documents, such as .doc, .xls
 * You will typically find the implementation of
 *  a given format's text extractor under
 *  org.apache.poi.[format].extractor .
 *
 * @see org.apache.poi.hssf.extractor.ExcelExtractor
 * @see org.apache.poi.hslf.extractor.PowerPointExtractor
 * @see org.apache.poi.hdgf.extractor.VisioTextExtractor
 * @see org.apache.poi.hwpf.extractor.WordExtractor
 */
public abstract class POIOLE2TextExtractor extends POITextExtractor {
	
The POIDocument that's open /** The POIDocument that's open */
	protected POIDocument document;

	
Creates a new text extractor for the given document
Params:
document – The POIDocument to use in this extractor./**
	 * Creates a new text extractor for the given document
	 *
	 * @param document The POIDocument to use in this extractor.
	 */
	public POIOLE2TextExtractor(POIDocument document) {
		this.document = document;

		// Ensure any underlying resources, such as open files,
		//  will get cleaned up if the user calls #close()
		setFilesystem(document);
	}

	
Creates a new text extractor, using the same
 document as another text extractor. Normally
 only used by properties extractors.
Params:
otherExtractor – the extractor which document to be used/**
	 * Creates a new text extractor, using the same
	 *  document as another text extractor. Normally
	 *  only used by properties extractors.
	 *
	 * @param otherExtractor the extractor which document to be used
	 */
	protected POIOLE2TextExtractor(POIOLE2TextExtractor otherExtractor) {
		this.document = otherExtractor.document;
	}

	
Returns the document information metadata for the document
Returns:
The Document Summary Information or null
     if it could not be read for this document./**
	 * Returns the document information metadata for the document
	 *
     * @return The Document Summary Information or null
     *      if it could not be read for this document.
	 */
	public DocumentSummaryInformation getDocSummaryInformation() {
		return document.getDocumentSummaryInformation();
	}
	
Returns the summary information metadata for the document.
Returns:
The Summary information for the document or null
     if it could not be read for this document./**
	 * Returns the summary information metadata for the document.
	 *
     * @return The Summary information for the document or null
     *      if it could not be read for this document.
	 */
	public SummaryInformation getSummaryInformation() {
		return document.getSummaryInformation();
	}

	
Returns an HPSF powered text extractor for the
 document properties metadata, such as title and author.
Returns:
an instance of POIExtractor that can extract meta-data./**
	 * Returns an HPSF powered text extractor for the
	 *  document properties metadata, such as title and author.
	 *
	 * @return an instance of POIExtractor that can extract meta-data.
	 */
	@Override
    public POITextExtractor getMetadataTextExtractor() {
		return new HPSFPropertiesExtractor(this);
	}

	
Return the underlying DirectoryEntry of this document.
Returns:
the DirectoryEntry that is associated with the POIDocument of this extractor./**
	 * Return the underlying DirectoryEntry of this document.
	 *
	 * @return the DirectoryEntry that is associated with the POIDocument of this extractor.
	 */
    public DirectoryEntry getRoot() {
        return document.getDirectory();
    }

    
Return the underlying POIDocument
Returns:
the underlying POIDocument/**
     * Return the underlying POIDocument
     *
     * @return the underlying POIDocument
     */
    @Override
    public POIDocument getDocument() {
        return document;
    }
}