extract metro-blob content from ppt

package org.apache.poi.hslf;

import static org.junit.Assert.assertTrue;

import java.io.ByteArrayInputStream;
import java.lang.reflect.Constructor;

import org.apache.poi.ddf.AbstractEscherOptRecord;
import org.apache.poi.ddf.EscherComplexProperty;
import org.apache.poi.ddf.EscherProperties;
import org.apache.poi.ddf.EscherTertiaryOptRecord;
import org.apache.poi.hslf.usermodel.HSLFShape;
import org.apache.poi.hslf.usermodel.HSLFSlide;
import org.apache.poi.hslf.usermodel.HSLFSlideShow;
import org.apache.poi.hslf.usermodel.HSLFSlideShowImpl;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.openxml4j.opc.PackagingURIHelper;
import org.apache.poi.xslf.usermodel.XSLFSheet;
import org.apache.poi.xslf.usermodel.XSLFTextBox;
import org.junit.Test;
import org.openxmlformats.schemas.presentationml.x2006.main.CTGroupShape;
import org.openxmlformats.schemas.presentationml.x2006.main.CTShape;

public class TestTeresa {
    @Test
    public void bla() throws Exception {
        HSLFSlideShow ppt = new HSLFSlideShow(new HSLFSlideShowImpl("test.ppt"));
        // get slides
        HSLFSlide slide0 = ppt.getSlides().get(0);
        HSLFShape sh = slide0.getShapes().get(0);
        AbstractEscherOptRecord opt = sh.getEscherChild(EscherTertiaryOptRecord.RECORD_ID);
        EscherComplexProperty ep = (EscherComplexProperty)opt.lookup(EscherProperties.GROUPSHAPE__METROBLOB);

        ByteArrayInputStream bis = new ByteArrayInputStream(ep.getComplexData());
        OPCPackage opc = OPCPackage.open(bis);
        PackagePart ppn = opc.getPart(PackagingURIHelper.createPartName("/drs/shapexml.xml"));
        CTGroupShape gs = CTGroupShape.Factory.parse(ppn.getInputStream());

        Constructor<XSLFTextBox> c = XSLFTextBox.class.getDeclaredConstructor(CTShape.class, XSLFSheet.class);
        c.setAccessible(true);
        XSLFTextBox tb = c.newInstance(gs.getSpArray(0), null);

        assertTrue(tb.getTextParagraphs().get(2).getTextRuns().get(0).isStrikethrough());
        opc.close();
    }
}