extract texts from a textshape with bullets

package org.apache.poi.hslf.extractor;

import java.io.FileInputStream;
import java.util.List;

import org.apache.poi.hslf.usermodel.HSLFShape;
import org.apache.poi.hslf.usermodel.HSLFShapeContainer;
import org.apache.poi.hslf.usermodel.HSLFSlide;
import org.apache.poi.hslf.usermodel.HSLFSlideShow;
import org.apache.poi.hslf.usermodel.HSLFTextParagraph;
import org.apache.poi.hslf.usermodel.HSLFTextRun;
import org.apache.poi.hslf.usermodel.HSLFTextShape;
import org.apache.poi.sl.usermodel.TextParagraph.BulletStyle;
import org.junit.Test;

// sample for thread:
// http://apache-poi.1045710.n5.nabble.com/ANNOUNCE-Apache-POI-3-13-beta1-released-tt5719469.html#a5719837
public class TestTeresa {
    @Test
    public void doit() throws Exception {
        FileInputStream fis = new FileInputStream("6_contingency_tables.ppt");
        HSLFSlideShow ppt = new HSLFSlideShow(fis);
        fis.close();

        StringBuilder sb = new StringBuilder();

        List<HSLFSlide> slides = ppt.getSlides();
        handleContainer(slides.get(1), sb);
        sb.append("---\n");
        handleContainer(slides.get(2), sb);
        sb.append("---\n");

        System.out.println(sb);
    }

    void handleContainer(HSLFShapeContainer sc, StringBuilder sb) {
        for (HSLFShape s : sc) {
            if (s instanceof HSLFTextShape) {
                HSLFTextShape ts = (HSLFTextShape)s;
                for (HSLFTextParagraph p : ts.getTextParagraphs()) {
                    for (int i=0; i<p.getIndentLevel(); i++) {
                        sb.append("   ");
                    }
                    BulletStyle bs = p.getBulletStyle();
                    if (bs != null) {
                        sb.append("* ");
                    }
                    for (HSLFTextRun r : p.getTextRuns()) {
                        sb.append(r.getRawText());
                    }
                    sb.append("\n");
                }
            } else if (s instanceof HSLFShapeContainer) {
                handleContainer((HSLFShapeContainer)s, sb);
            }
        }
    }
}