Find no. of slides in the presentationML document

Hi,

This is the simple code written using Java to find no. of slides in the presentationML document.

package pptxslidescnt;
 
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import tozipandunzip.ToUnZipFile;
 

public class PptxSlidesCnt {
   
       
    public static void main(String [] args){
       
        int slidesCnt = 0;
 
        // Folder in which output can be found. This value is hard coded, but can also be obtained dynamically
        String extractToFolder = "E:\\ooxml\\pptslidescount\\count";
 
      // Path of Presentation file
        String fromToFolder = "E:\\ooxml\\pptslidescount\\slidecount.pptx";

        String presentationXmlName = null;
        String pathpresentationXmlName = null;
        ToUnZipFile toUnZipFile = null;
        DocumentBuilderFactory docBuilderFactory = null;
        DocumentBuilder docBuilder = null;
        File contentTypeXML = null;
        Document contentTypeXMLdoc = null;
        NodeList overrideLst = null;
        Node overRideNode = null;
        NamedNodeMap nnmap = null;
        Document presentationXMLDoc = null;
        NodeList slidesLst = null;
           
        try{
           
            toUnZipFile = new ToUnZipFile();

            //The file has been unzipped
            toUnZipFile.unZipFile(fromToFolder,extractToFolder);

            //Obtain a new instance of a DocumentBuilderFactory
            docBuilderFactory = DocumentBuilderFactory.newInstance();

            //Creates a new instance of a DocumentBuilder using the currently configured parameters
            docBuilder = docBuilderFactory.newDocumentBuilder();           
            contentTypeXML = new File(extractToFolder + "\\" + "[Content_Types].xml");

            //parse an XML file and get any element's content or attribute's value WITHOUT "walking the tree"
            contentTypeXMLdoc = docBuilder.parse (contentTypeXML);

            //retrieve all Override elements in the [Content_Types].xml
            overrideLst = contentTypeXMLdoc.getElementsByTagName("Override");
           
            for(int overrideLstCnt=0; overrideLstCnt<overrideLst.getLength() ; overrideLstCnt++){
                overRideNode = overrideLst.item(overrideLstCnt);          
                nnmap = overRideNode.getAttributes();
                if

(nnmap.getNamedItem("ContentType").toString().contains("vnd.openxmlformats-officedocument.presentationml.presentatio

n.main+xml"))
 
                {
                    presentationXmlName =nnmap.getNamedItem("PartName").getNodeValue();
                    pathpresentationXmlName = extractToFolder+presentationXmlName;
                    presentationXMLDoc = docBuilder.parse (pathpresentationXmlName);
                     slidesLst = presentationXMLDoc.getElementsByTagName("p:sldId");
                    slidesCnt = slidesLst.getLength();
                    break;
                }          
 
            }//end of for loop    
         System.out.println("No of slides = "+slidesCnt);
         }catch (SAXParseException err) {
       
            System.out.println(" " + err.getMessage ());
        }catch (Throwable t) {
        t.printStackTrace ();
        }
    }
}
 
Code to unzip a zip file:
 
public static void unZipFile(String zipFileName, String toExtractFile)
 {
                String inputFileName = zipFileName;
                String desFileName = toExtractFile;
                try
                {
                    File sourceZipFile = new File(inputFileName);
                    File destDirectory = new File(desFileName);
                    ZipFile zipFile = new ZipFile(sourceZipFile, ZipFile.OPEN_READ);
                    Enumeration enumeration = zipFile.entries();
                    while(enumeration.hasMoreElements())
                    {
                        ZipEntry zipEntry = (ZipEntry) enumeration.nextElement();
                        String currName = zipEntry.getName();
                        File destFile = new File(destDirectory, currName);
                       
                        File destinationParent = destFile.getParentFile();
                        destinationParent.mkdirs();
                       
                        if( ! zipEntry.isDirectory())
                        {
                            BufferedInputStream is = new BufferedInputStream(zipFile.getInputStream(zipEntry));
                           
                            int currentByte;
                           
                            FileOutputStream fos = new FileOutputStream(destFile);
                            BufferedOutputStream dest =  new BufferedOutputStream(fos);
                           
                            while((currentByte = is.read()) != -1)
                            {
                                dest.write(currentByte);
                            }
                           
                            dest.flush();
                            dest.close();
                            is.close();
                        }
                       
                    }
                                
                }
                catch(Exception e)
                {
                    System.out.println(" Exception "+e);
                }
}

Sheela