--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlet/src/digilib/pdf/PDFStreamWorker.java	Thu Dec 16 21:19:11 2010 +0100
@@ -0,0 +1,162 @@
+package digilib.pdf;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import org.apache.log4j.Logger;
+
+import com.itextpdf.text.Document;
+import com.itextpdf.text.DocumentException;
+import com.itextpdf.text.Image;
+import com.itextpdf.text.PageSize;
+import com.itextpdf.text.pdf.PdfWriter;
+
+import digilib.image.DocuImage;
+import digilib.image.ImageJobDescription;
+import digilib.image.ImageWorker;
+import digilib.servlet.DigilibConfiguration;
+import digilib.servlet.PDFRequest;
+import digilib.util.DigilibJobCenter;
+import digilib.util.NumRange;
+
+public class PDFStreamWorker implements Callable<OutputStream> {
+
+	protected static Logger logger = Logger.getLogger(PDFStreamWorker.class);
+
+	protected DigilibConfiguration dlConfig = null;
+
+	protected Document doc = null;
+
+	protected OutputStream outstream = null;
+
+	protected PDFRequest job_info = null;
+
+	protected DigilibJobCenter<DocuImage> imageJobCenter = null;
+
+	/**
+	 * @param dlConfig
+	 * @param outputfile
+	 * @param job_info
+	 */
+	public PDFStreamWorker(DigilibConfiguration dlConfig, OutputStream outputfile,
+			PDFRequest job_info,
+			DigilibJobCenter<DocuImage> imageJobCenter) {
+		super();
+		this.dlConfig = dlConfig;
+		this.outstream = outputfile;
+		this.job_info = job_info;
+		this.imageJobCenter = imageJobCenter;
+	}
+
+	public OutputStream call() throws Exception {
+		outstream = renderPDF();
+		return outstream;
+	}
+
+	/**
+	 * @throws DocumentException
+	 * @throws InterruptedException
+	 * @throws ExecutionException
+	 * @throws IOException
+	 */
+	protected OutputStream renderPDF() throws DocumentException, InterruptedException,
+			ExecutionException, IOException {
+		// create document object
+		doc = new Document(PageSize.A4, 0, 0, 0, 0);
+		PdfWriter docwriter = null;
+
+		long start_time = System.currentTimeMillis();
+
+		docwriter = PdfWriter.getInstance(doc, outstream);
+
+		setPDFProperties(doc);
+
+		doc.open();
+
+		addTitlePage(doc);
+
+		logger.debug("- " + outstream + " doc.open()ed ("
+				+ (System.currentTimeMillis() - start_time) + "ms)");
+		start_time = System.currentTimeMillis();
+
+		NumRange pgs = job_info.getPages();
+
+		for (int p : pgs) {
+			logger.debug(" - adding Image " + p + " to " + outstream);
+			// create ImageJobInformation
+			ImageJobDescription iji = ImageJobDescription.getInstance(job_info, job_info.getDlConfig());
+			iji.setValue("pn", p);
+			addImage(doc, iji);
+			logger.debug(" - done adding Image " + p + " to " + outstream);
+		}
+
+		logger.debug(" - done adding all Images to " + outstream);
+
+		doc.close();
+		logger.debug("- " + outstream + " doc.close() ("
+				+ (System.currentTimeMillis() - start_time) + "ms)");
+		docwriter.close();
+		return outstream;
+	}
+
+	/**
+	 * Set PDF-Meta-Attributes.
+	 */
+	public Document setPDFProperties(Document doc) {
+		// TODO get proper Information from dlConfig
+		doc.addAuthor(this.getClass().getName());
+		doc.addCreationDate();
+		doc.addKeywords("digilib");
+		doc.addTitle("digilib PDF");
+		doc.addCreator(this.getClass().getName());
+		return doc;
+	}
+
+	/**
+	 * Create a title page and append it to the document (should, of course, be
+	 * called first)
+	 * 
+	 * @throws DocumentException
+	 */
+	public Document addTitlePage(Document doc) throws DocumentException {
+		PDFTitlePage titlepage = new PDFTitlePage(job_info);
+		doc.add(titlepage.getPageContents());
+		doc.newPage();
+		return doc;
+	}
+
+	/**
+	 * adds an image to the document.
+	 * 
+	 * @param doc
+	 * @param iji
+	 * @return
+	 * @throws InterruptedException
+	 * @throws ExecutionException
+	 * @throws IOException
+	 * @throws DocumentException
+	 */
+	public Document addImage(Document doc, ImageJobDescription iji)
+			throws InterruptedException, ExecutionException, IOException,
+			DocumentException {
+		// create image worker
+		ImageWorker job = new ImageWorker(dlConfig, iji);
+		// submit
+		Future<DocuImage> jobTicket = imageJobCenter.submit(job);
+		// wait for result
+		DocuImage img = jobTicket.get();
+		// scale the image
+		Image pdfimg = Image.getInstance(img.getAwtImage(), null);
+		float docW = PageSize.A4.getWidth() - 2 * PageSize.A4.getBorder();
+		float docH = PageSize.A4.getHeight() - 2 * PageSize.A4.getBorder();
+		// TODO: do we really scale this again?
+		pdfimg.scaleToFit(docW, docH);
+		// add to PDF
+		doc.add(pdfimg);
+		return doc;
+	}
+
+}