import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.lang.StringBuffer;


// https://svn.apache.org/repos/asf/poi/trunk/src/ooxml/testcases/org/apache/poi/extractor/TestExtractorFactory.java
import org.apache.poi.POIOLE2TextExtractor;
import org.apache.poi.POITextExtractor;
//import org.apache.poi.POIDataSamples;
//import org.apache.poi.extractor.*;
import org.apache.poi.extractor.ExtractorFactory;
import org.apache.poi.hdgf.extractor.VisioTextExtractor;
import org.apache.poi.hpbf.extractor.PublisherTextExtractor;
import org.apache.poi.hslf.extractor.PowerPointExtractor;
import org.apache.poi.hsmf.extractor.OutlookTextExtactor;
import org.apache.poi.hssf.extractor.EventBasedExcelExtractor;
import org.apache.poi.hssf.extractor.ExcelExtractor;
import org.apache.poi.hwpf.extractor.Word6Extractor;
import org.apache.poi.hwpf.extractor.WordExtractor;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.xslf.extractor.XSLFPowerPointExtractor;
import org.apache.poi.xssf.extractor.XSSFEventBasedExcelExtractor;
import org.apache.poi.xssf.extractor.XSSFExcelExtractor;
import org.apache.poi.xwpf.extractor.XWPFWordExtractor;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.poifs.filesystem.OfficeXmlFileException;

import org.apache.poi.xslf.usermodel.XMLSlideShow; // pptx 2007, http://poi.apache.org/apidocs/org/apache/poi/xslf/
import org.apache.poi.xwpf.usermodel.XWPFDocument; // docx 2007, http://poi.apache.org/apidocs/org/apache/poi/xwpf/
import org.apache.poi.xssf.usermodel.XSSFWorkbook; // xlsx 2007, http://poi.apache.org/apidocs/org/apache/poi/xssf/

class ExtractText
{
    public static String file(String path) {
        try { return pptx(new FileInputStream(path)); } catch(Exception e) { }
        try { return docx(new FileInputStream(path)); } catch(Exception e) { }
        try { return xlsx(new FileInputStream(path)); } catch(Exception e) { }
        return "";
    }
    public static String pptx(InputStream in) throws Exception {
        XSLFPowerPointExtractor o = new XSLFPowerPointExtractor( new XMLSlideShow(in) );
        o.setSlidesByDefault(true);
        o.setNotesByDefault(true);
        return o.getText();
    }
    public static String docx(InputStream in) throws Exception {
        XWPFWordExtractor o = new XWPFWordExtractor(new XWPFDocument(in));
        return o.getText();
    }
    public static String xlsx(InputStream in) throws Exception {
        XSSFExcelExtractor o = new XSSFExcelExtractor(new XSSFWorkbook(in));
        return o.getText();
    }
    public static void main(String argv[]) {
        try {
            InputStream in = null;
            if (argv.length < 1)
                in = System.in;
            else
                in = new FileInputStream(argv[0]);
            StringBuffer output = new StringBuffer();
            POITextExtractor textExtractor = ExtractorFactory.createExtractor(in);

            if (textExtractor instanceof ExcelExtractor) // xls, excel 97-2003
            {
                ExcelExtractor extractor = (ExcelExtractor) textExtractor;
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof XSSFExcelExtractor) // xlsx, excel 2007
            {
                XSSFExcelExtractor extractor = (XSSFExcelExtractor) textExtractor;
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof Word6Extractor) // doc, word 95
            {
                Word6Extractor extractor = (Word6Extractor) textExtractor;
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof WordExtractor) // doc, word 97-2003
            {
                WordExtractor extractor = (WordExtractor) textExtractor;
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof XWPFWordExtractor) // docx, word 2007
            {
                XWPFWordExtractor extractor = (XWPFWordExtractor) textExtractor;
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof PowerPointExtractor) // ppt, ppt 97-2003
            {
                PowerPointExtractor extractor = (PowerPointExtractor) textExtractor;
                output.append(extractor.getText());
                output.append(extractor.getNotes());
            }
            else if (textExtractor instanceof XSLFPowerPointExtractor ) // pptx, powerpoint 2007
            {
                XSLFPowerPointExtractor extractor = (XSLFPowerPointExtractor) textExtractor;
                extractor.setSlidesByDefault(true);
                extractor.setNotesByDefault(true);
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof VisioTextExtractor) // vsd, visio
            {
                VisioTextExtractor extractor = (VisioTextExtractor) textExtractor;
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof PublisherTextExtractor) // pub, publisher
            {
                PublisherTextExtractor extractor = (PublisherTextExtractor) textExtractor;
                output.append(extractor.getText());
            }
            else if (textExtractor instanceof OutlookTextExtactor) // msg, outlook
            {
                OutlookTextExtactor extractor = (OutlookTextExtactor) textExtractor;
                output.append(extractor.getText());
            }
            System.out.println(output.toString().replaceAll( "[\n\t\r ]+"," "));
        }
        catch (Exception e)
        {
            // TODO Auto-generated catch block
            //e.printStackTrace();
            //System.out.println(e);
        }
    }
}