src/examples/src/org/apache/poi/hssf/usermodel/examples/EmeddedObjects.java

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package org.apache.poi.hssf.usermodel.examples;

import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.DirectoryNode;
import org.apache.poi.poifs.filesystem.Entry;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hslf.HSLFSlideShow;
import org.apache.poi.hslf.usermodel.SlideShow;

import java.io.FileInputStream;
import java.util.Iterator;

/**
 * Demonstrates how you can extract embedded data from a .xls file
 */
public class EmeddedObjects {
    public static void main(String[] args) throws Exception {
        POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(args[0]));
        HSSFWorkbook workbook = new HSSFWorkbook(fs);
        for (HSSFObjectData obj : workbook.getAllEmbeddedObjects()) {
            //the OLE2 Class Name of the object
            String oleName = obj.getOLE2ClassName();
            if (oleName.equals("Worksheet")) {
                DirectoryNode dn = (DirectoryNode) obj.getDirectory();
                HSSFWorkbook embeddedWorkbook = new HSSFWorkbook(dn, fs, false);
                //System.out.println(entry.getName() + ": " + embeddedWorkbook.getNumberOfSheets());
            } else if (oleName.equals("Document")) {
                DirectoryNode dn = (DirectoryNode) obj.getDirectory();
                HWPFDocument embeddedWordDocument = new HWPFDocument(dn);
                //System.out.println(entry.getName() + ": " + embeddedWordDocument.getRange().text());
            }  else if (oleName.equals("Presentation")) {
                DirectoryNode dn = (DirectoryNode) obj.getDirectory();
                SlideShow embeddedPowerPointDocument = new SlideShow(new HSLFSlideShow(dn));
                //System.out.println(entry.getName() + ": " + embeddedPowerPointDocument.getSlides().length);
            } else {
                if(obj.hasDirectoryEntry()){
                    // The DirectoryEntry is a DocumentNode. Examine its entries to find out what it is
                    DirectoryNode dn = (DirectoryNode) obj.getDirectory();
                    for (Iterator entries = dn.getEntries(); entries.hasNext();) {
                        Entry entry = (Entry) entries.next();
                        //System.out.println(oleName + "." + entry.getName());
                    }
                } else {
                    // There is no DirectoryEntry
                    // Recover the object's data from the HSSFObjectData instance.
                    byte[] objectData = obj.getObjectData();
                }
            }
        }
    }
}