clases.unirPdf.java Source code

Introduction

Here is the source code for clases.unirPdf.java

Source

/*
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 * and open the template in the editor.
 */
package clases;

import com.lowagie.text.Document;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 *
 * @author anonimus
 */
public class unirPdf {
    public static void concatPDFs(List<InputStream> streamOfPDFFiles, OutputStream outputStream, boolean paginate) {

        Document document = new Document();
        try {
            List<InputStream> pdfs = streamOfPDFFiles;
            List<PdfReader> readers = new ArrayList<PdfReader>();
            int totalPages = 0;
            Iterator<InputStream> iteratorPDFs = pdfs.iterator();

            while (iteratorPDFs.hasNext()) {
                InputStream pdf = iteratorPDFs.next();
                PdfReader pdfReader = new PdfReader(pdf);
                readers.add(pdfReader);
                totalPages += pdfReader.getNumberOfPages();
            }

            PdfWriter writer = PdfWriter.getInstance(document, outputStream);

            document.open();
            PdfContentByte cb = writer.getDirectContent();

            PdfImportedPage page;
            int currentPageNumber = 0;
            int pageOfCurrentReaderPDF = 0;
            Iterator<PdfReader> iteratorPDFReader = readers.iterator();

            while (iteratorPDFReader.hasNext()) {
                PdfReader pdfReader = iteratorPDFReader.next();

                while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {

                    Rectangle rectangle = pdfReader.getPageSizeWithRotation(1);
                    document.setPageSize(rectangle);
                    document.newPage();

                    pageOfCurrentReaderPDF++;
                    currentPageNumber++;
                    page = writer.getImportedPage(pdfReader, pageOfCurrentReaderPDF);
                    switch (rectangle.getRotation()) {
                    case 0:
                        cb.addTemplate(page, 1f, 0, 0, 1f, 0, 0);
                        break;
                    case 90:
                        cb.addTemplate(page, 0, -1f, 1f, 0, 0, pdfReader.getPageSizeWithRotation(1).getHeight());
                        break;
                    case 180:
                        cb.addTemplate(page, -1f, 0, 0, -1f, 0, 0);
                        break;
                    case 270:
                        cb.addTemplate(page, 0, 1.0F, -1.0F, 0, pdfReader.getPageSizeWithRotation(1).getWidth(), 0);
                        break;
                    default:
                        break;
                    }
                    if (paginate) {
                        cb.beginText();
                        cb.getPdfDocument().getPageSize();
                        cb.endText();
                    }
                }
                pageOfCurrentReaderPDF = 0;
            }
            outputStream.flush();
            document.close();
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (document.isOpen())
                document.close();
            try {
                if (outputStream != null)
                    outputStream.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }
}