Java tutorial
/******************************************************************************* * <copyright> Copyright 2014 by E-Government Innovation Center EGIZ, Graz, Austria </copyright> * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a * joint initiative of the Federal Chancellery Austria and Graz University of * Technology. * * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by * the European Commission - subsequent versions of the EUPL (the "Licence"); * You may not use this work except in compliance with the Licence. * You may obtain a copy of the Licence at: * http://www.osor.eu/eupl/ * * Unless required by applicable law or agreed to in writing, software * distributed under the Licence is distributed on an "AS IS" basis, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Licence for the specific language governing permissions and * limitations under the Licence. * * This product combines work with different licenses. See the "NOTICE" text * file for details on the various modules and licenses. * The "NOTICE" text file is part of the distribution. Any derivative works * that you distribute must include a readable copy of the "NOTICE" text file. ******************************************************************************/ package at.gv.egiz.pdfas.lib.impl.stamping.pdfbox; import java.awt.geom.AffineTransform; import java.awt.geom.Point2D; import java.awt.image.BufferedImage; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.security.MessageDigest; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.codec.binary.Hex; import org.apache.pdfbox.cos.COSArray; import org.apache.pdfbox.cos.COSDictionary; import org.apache.pdfbox.cos.COSName; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.PDResources; import org.apache.pdfbox.pdmodel.common.PDRectangle; import org.apache.pdfbox.pdmodel.common.PDStream; import org.apache.pdfbox.pdmodel.edit.PDPageContentStream; import org.apache.pdfbox.pdmodel.graphics.xobject.PDJpeg; import org.apache.pdfbox.pdmodel.graphics.xobject.PDPixelMap; import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectForm; import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage; import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceDictionary; import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceStream; import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature; import org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible.PDVisibleSigBuilder; import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm; import org.apache.pdfbox.pdmodel.interactive.form.PDField; import org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import at.gv.egiz.pdfas.common.exceptions.PdfAsException; import at.gv.egiz.pdfas.common.settings.ISettings; import at.gv.egiz.pdfas.common.utils.ImageUtils; import at.knowcenter.wag.egov.egiz.table.Entry; public class PDFAsVisualSignatureBuilder extends PDVisibleSigBuilder implements IDGenerator { private static final Logger logger = LoggerFactory.getLogger(PDFAsVisualSignatureBuilder.class); private PDFAsVisualSignatureProperties properties; private PDFAsVisualSignatureDesigner designer; private ISettings settings; private PDResources innerFormResources; private Map<String, ImageObject> images = new HashMap<String, ImageObject>(); public PDFAsVisualSignatureBuilder(PDFAsVisualSignatureProperties properties, ISettings settings, PDFAsVisualSignatureDesigner designer) { this.properties = properties; this.settings = settings; this.designer = designer; } @Override public void createProcSetArray() { COSArray procSetArr = new COSArray(); procSetArr.add(COSName.getPDFName("PDF")); procSetArr.add(COSName.getPDFName("Text")); procSetArr.add(COSName.getPDFName("ImageC")); procSetArr.add(COSName.getPDFName("ImageB")); procSetArr.add(COSName.getPDFName("ImageI")); getStructure().setProcSet(procSetArr); logger.debug("ProcSet array has been created"); } public void createMyPage(PDFAsVisualSignatureDesigner properties) { PDPage page = properties.getSignaturePage(); if (page == null) { page = new PDPage(); page.setMediaBox(new PDRectangle(properties.getPageWidth(), properties.getPageHeight())); } getStructure().setPage(page); logger.info("PDF page has been created"); } @Override public void createTemplate(PDPage page) throws IOException { PDDocument template = new PDDocument(); template.addPage(page); getStructure().setTemplate(template); } public String createHashedId(String value) { try { MessageDigest md = MessageDigest.getInstance("SHA-1"); md.reset(); return Hex.encodeHexString(md.digest(value.getBytes("UTF-8"))); } catch (Throwable e) { logger.warn("Failed to generate ID for Image using value", e); return value; } } private void readTableResources(PDFBoxTable table, PDDocument template) throws PdfAsException, IOException { float[] colsSizes = table.getColsRelativeWith(); int max_cols = table.getColCount(); float padding = table.getPadding(); if (colsSizes == null) { colsSizes = new float[max_cols]; // set the column ratio for all columns to 1 for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) { colsSizes[cols_idx] = 1; } } logger.debug("TOTAL Width: " + table.getWidth()); float total = 0; for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) { total += colsSizes[cols_idx]; } for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) { colsSizes[cols_idx] = (colsSizes[cols_idx] / total) * table.getWidth(); } for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) { logger.debug("Col: " + cols_idx + " : " + colsSizes[cols_idx]); } /* * if(!addedFonts.contains(table.getFont().getFont(null))) { PDFont font * = table.getFont().getFont(template); addedFonts.add(font); * innerFormResources.addFont(font); } * * if(!addedFonts.contains(table.getValueFont().getFont(null))) { PDFont * font = table.getValueFont().getFont(template); addedFonts.add(font); * innerFormResources.addFont(font); } */ for (int i = 0; i < table.getRowCount(); i++) { ArrayList<Entry> row = table.getRow(i); for (int j = 0; j < row.size(); j++) { Entry cell = (Entry) row.get(j); if (cell.getType() == Entry.TYPE_IMAGE) { String img_value = (String) cell.getValue(); String img_ref = createHashedId(img_value); if (!images.containsKey(img_ref)) { BufferedImage img = ImageUtils.getImage(img_value, settings); float width = colsSizes[j]; float height = table.getRowHeights()[i] + padding * 2; float iwidth = (int) Math.floor((double) width); iwidth -= 2 * padding; float iheight = (int) Math.floor((double) height); iheight -= 2 * padding; float origWidth = (float) img.getWidth(); float origHeight = (float) img.getHeight(); if (table.style != null) { if (table.style.getImageScaleToFit() != null) { iwidth = table.style.getImageScaleToFit().getWidth(); iheight = table.style.getImageScaleToFit().getHeight(); } } float wfactor = iwidth / origWidth; float hfactor = iheight / origHeight; float scaleFactor = wfactor; if (hfactor < wfactor) { scaleFactor = hfactor; } iwidth = (float) Math.floor((double) (scaleFactor * origWidth)); iheight = (float) Math.floor((double) (scaleFactor * origHeight)); logger.debug("Scaling image to: " + iwidth + " x " + iheight); if (this.designer.properties.getSignatureProfileSettings().isPDFA()) { img = ImageUtils.removeAlphaChannel(img); } else { if (img.getAlphaRaster() == null && img.getColorModel().hasAlpha()) { img = ImageUtils.removeAlphaChannel(img); } } // img = ImageUtils.convertRGBAToIndexed(img); PDXObjectImage pdImage = new PDPixelMap(template, img); ImageObject image = new ImageObject(pdImage, iwidth, iheight); images.put(img_ref, image); innerFormResources.addXObject(pdImage, "Im"); } } else if (cell.getType() == Entry.TYPE_TABLE) { PDFBoxTable tbl_value = (PDFBoxTable) cell.getValue(); readTableResources(tbl_value, template); } } } } public void createInnerFormStreamPdfAs(PDDocument template, PDDocument origDoc) throws PdfAsException { try { // Hint we have to create all PDXObjectImages before creating the // PDPageContentStream // only PDFbox developers know why ... // if (getStructure().getPage().getResources() != null) { // innerFormResources = getStructure().getPage().getResources(); // } else { innerFormResources = new PDResources(); getStructure().getPage().setResources(innerFormResources); // } readTableResources(properties.getMainTable(), template); PDPageContentStream stream = new PDPageContentStream(template, getStructure().getPage()); // stream.setFont(PDType1Font.COURIER, 5); TableDrawUtils.drawTable(getStructure().getPage(), stream, 1, 1, designer.getWidth(), designer.getHeight(), properties.getMainTable(), template, false, innerFormResources, images, settings, this, properties); stream.close(); PDStream innterFormStream = getStructure().getPage().getContents(); getStructure().setInnterFormStream(innterFormStream); logger.debug("Stream of another form (inner form - it would be inside holder form) has been created"); } catch (Throwable e) { logger.warn("Failed to create visual signature block", e); throw new PdfAsException("Failed to create visual signature block", e); } } @Override public void injectProcSetArray(PDXObjectForm innerForm, PDPage page, PDResources innerFormResources, PDResources imageFormResources, PDResources holderFormResources, COSArray procSet) { innerForm.getResources().getCOSDictionary().setItem(COSName.PROC_SET, procSet); // page.getCOSDictionary().setItem(COSName.PROC_SET, procSet); innerFormResources.getCOSDictionary().setItem(COSName.PROC_SET, procSet); /* * imageFormResources.getCOSDictionary() .setItem(COSName.PROC_SET, * procSet); */ holderFormResources.getCOSDictionary().setItem(COSName.PROC_SET, procSet); logger.debug("inserted ProcSet to PDF"); } public void injectAppearanceStreams(PDStream holderFormStream, PDStream innterFormStream, PDStream imageFormStream, String imageObjectName, String imageName, String innerFormName, PDFAsVisualSignatureDesigner properties) throws IOException { double m00 = getStructure().getAffineTransform().getScaleX(); double m10 = getStructure().getAffineTransform().getShearY(); double m01 = getStructure().getAffineTransform().getShearX(); double m11 = getStructure().getAffineTransform().getScaleY(); double m02 = getStructure().getAffineTransform().getTranslateX(); double m12 = getStructure().getAffineTransform().getTranslateY(); String holderFormComment = "q " + m00 + " " + m10 + " " + m01 + " " + m11 + " " + m02 + " " + m12 + " cm /" + innerFormName + " Do Q"; logger.debug("Holder Form Stream: " + holderFormComment); String innerFormComment = getStructure().getInnterFormStream().getInputStreamAsString(); // PDFBOX-3321 avoid length being written as an indirect object, // to prevent call of heuristic readUntilEndStream() getStructure().getHolderFormStream().getStream().setInt(COSName.LENGTH, 0); getStructure().getInnterFormStream().getStream().setInt(COSName.LENGTH, 0); // getStructure().getImageFormStream().getStream().setInt(COSName.LENGTH, 0); appendRawCommands(getStructure().getHolderFormStream().createOutputStream(), holderFormComment); appendRawCommands(getStructure().getInnterFormStream().createOutputStream(), innerFormComment); logger.debug("Injected appearance stream to pdf"); } public void createPage(PDFAsVisualSignatureDesigner properties) { PDPage page = new PDPage(); page.setMediaBox(new PDRectangle(properties.getPageWidth(), properties.getPageHeight())); page.setRotation(properties.getPageRotation()); getStructure().setPage(page); logger.debug("PDF page has been created"); } public void createAcroForm(PDDocument template) { PDAcroForm theAcroForm = new PDAcroForm(template); template.getDocumentCatalog().setAcroForm(theAcroForm); getStructure().setAcroForm(theAcroForm); logger.debug("Acro form page has been created"); } public void createSignatureField(PDAcroForm acroForm) throws IOException { PDSignatureField sf = new PDSignatureField(acroForm); getStructure().setSignatureField(sf); logger.debug("Signature field has been created"); } public void createSignature(PDSignatureField pdSignatureField, PDPage page, String signatureName) throws IOException { PDSignature pdSignature = new PDSignature(); pdSignatureField.setSignature(pdSignature); pdSignatureField.getWidget().setPage(page); page.getAnnotations().add(pdSignatureField.getWidget()); pdSignature.setName(signatureName); pdSignature.setByteRange(new int[] { 0, 0, 0, 0 }); pdSignature.setContents(new byte[4096]); getStructure().setPdSignature(pdSignature); logger.debug("PDSignature has been created"); } public void createAcroFormDictionary(PDAcroForm acroForm, PDSignatureField signatureField) throws IOException { @SuppressWarnings("unchecked") List<PDField> acroFormFields = acroForm.getFields(); COSDictionary acroFormDict = acroForm.getDictionary(); acroFormDict.setDirect(true); acroFormDict.setInt(COSName.SIG_FLAGS, 3); acroFormFields.add(signatureField); acroFormDict.setString(COSName.DA, "/sylfaen 0 Tf 0 g"); getStructure().setAcroFormFields(acroFormFields); getStructure().setAcroFormDictionary(acroFormDict); logger.debug("AcroForm dictionary has been created"); } public void createSignatureRectangle(PDSignatureField signatureField, PDFAsVisualSignatureDesigner properties, float degrees) throws IOException { PDRectangle rect = new PDRectangle(); Point2D upSrc = new Point2D.Float(); upSrc.setLocation(properties.getxAxis() + properties.getWidth(), properties.getPageHeight() - properties.getyAxis()); Point2D llSrc = new Point2D.Float(); llSrc.setLocation(properties.getxAxis(), properties.getPageHeight() - properties.getyAxis() - properties.getHeight()); rect.setUpperRightX((float) upSrc.getX()); rect.setUpperRightY((float) upSrc.getY()); rect.setLowerLeftY((float) llSrc.getY()); rect.setLowerLeftX((float) llSrc.getX()); logger.debug("orig rectangle of signature has been created: {}", rect.toString()); AffineTransform transform = new AffineTransform(); transform.setToIdentity(); if (degrees % 360 != 0) { transform.setToRotation(Math.toRadians(degrees), llSrc.getX(), llSrc.getY()); } Point2D upDst = new Point2D.Float(); transform.transform(upSrc, upDst); Point2D llDst = new Point2D.Float(); transform.transform(llSrc, llDst); float xPos = properties.getxAxis(); float yPos = properties.getPageHeight() - properties.getyAxis(); logger.debug("POS {} x {}", xPos, yPos); logger.debug("SIZE {} x {}", properties.getWidth(), properties.getHeight()); // translate according to page! rotation int pageRotation = properties.getPageRotation(); AffineTransform translate = new AffineTransform(); switch (pageRotation) { case 90: translate.setToTranslation( properties.getPageHeight() - (properties.getPageHeight() - properties.getyAxis()) - properties.getxAxis() + properties.getHeight(), properties.getxAxis() + properties.getHeight() - (properties.getPageHeight() - properties.getyAxis())); break; case 180: // translate.setToTranslation(properties.getPageWidth() - // properties.getxAxis() - properties.getxAxis(), // properties.getPageHeight() - properties.getyAxis() + // properties.getHeight()); translate.setToTranslation(properties.getPageWidth() - 2 * xPos, properties.getPageHeight() - 2 * (yPos - properties.getHeight())); break; case 270: translate.setToTranslation(-properties.getHeight() + yPos - xPos, properties.getPageWidth() - (yPos - properties.getHeight()) - xPos); break; } translate.transform(upDst, upDst); translate.transform(llDst, llDst); rect.setUpperRightX((float) upDst.getX()); rect.setUpperRightY((float) upDst.getY()); rect.setLowerLeftY((float) llDst.getY()); rect.setLowerLeftX((float) llDst.getX()); logger.debug("rectangle of signature has been created: {}", rect.toString()); signatureField.getWidget().setRectangle(rect); getStructure().setSignatureRectangle(rect); logger.debug("rectangle of signature has been created"); } public void createAffineTransform(float[] params) { AffineTransform transform = new AffineTransform(params[0], params[1], params[2], params[3], params[4], params[5]); // transform.rotate(90); getStructure().setAffineTransform(transform); logger.debug("Matrix has been added"); } public void createSignatureImage(PDDocument template, InputStream inputStream) throws IOException { PDJpeg img = new PDJpeg(template, inputStream); getStructure().setJpedImage(img); logger.debug("Visible Signature Image has been created"); // pdfStructure.setTemplate(template); inputStream.close(); } public void createFormaterRectangle(float[] params) { PDRectangle formrect = new PDRectangle(); float[] translated = new float[4]; getStructure().getAffineTransform().transform(params, 0, translated, 0, 2); formrect.setUpperRightX(translated[0]); formrect.setUpperRightY(translated[1]); formrect.setLowerLeftX(translated[2]); formrect.setLowerLeftY(translated[3]); getStructure().setFormaterRectangle(formrect); logger.debug("Formater rectangle has been created"); } public void createHolderFormStream(PDDocument template) { PDStream holderForm = new PDStream(template); getStructure().setHolderFormStream(holderForm); logger.debug("Holder form Stream has been created"); } public void createHolderFormResources() { PDResources holderFormResources = new PDResources(); getStructure().setHolderFormResources(holderFormResources); logger.debug("Holder form resources have been created"); } public void createHolderForm(PDResources holderFormResources, PDStream holderFormStream, PDRectangle formrect) { PDXObjectForm holderForm = new PDXObjectForm(holderFormStream); holderForm.setResources(holderFormResources); holderForm.setBBox(formrect); holderForm.setFormType(1); getStructure().setHolderForm(holderForm); logger.debug("Holder form has been created"); } public void createAppearanceDictionary(PDXObjectForm holderForml, PDSignatureField signatureField, float degrees) throws IOException { PDAppearanceDictionary appearance = new PDAppearanceDictionary(); appearance.getCOSObject().setDirect(true); PDAppearanceStream appearanceStream = new PDAppearanceStream(holderForml.getCOSStream()); AffineTransform transform = new AffineTransform(); transform.setToIdentity(); transform.rotate(Math.toRadians(degrees)); appearanceStream.setMatrix(transform); appearance.setNormalAppearance(appearanceStream); signatureField.getWidget().setAppearance(appearance); getStructure().setAppearanceDictionary(appearance); logger.debug("PDF appearance Dictionary has been created"); } public void createInnerFormResource() { getStructure().setInnerFormResources(innerFormResources); logger.debug("Resources of another form (inner form - it would be inside holder form) have been created"); } public void createInnerForm(PDResources innerFormResources, PDStream innerFormStream, PDRectangle formrect) { PDXObjectForm innerForm = new PDXObjectForm(innerFormStream); innerForm.setResources(innerFormResources); innerForm.setBBox(formrect); innerForm.setFormType(1); getStructure().setInnerForm(innerForm); logger.debug("Another form (inner form - it would be inside holder form) has been created"); } public void insertInnerFormToHolerResources(PDXObjectForm innerForm, PDResources holderFormResources) { String name = holderFormResources.addXObject(innerForm, "FRM"); getStructure().setInnerFormName(name); logger.debug("Already inserted inner form inside holder form"); } public void createImageFormStream(PDDocument template) { PDStream imageFormStream = new PDStream(template); getStructure().setImageFormStream(imageFormStream); logger.debug("Created image form Stream"); } public void createImageFormResources() { PDResources imageFormResources = new PDResources(); getStructure().setImageFormResources(imageFormResources); logger.debug("Created image form Resources"); } public void createImageForm(PDResources imageFormResources, PDResources innerFormResource, PDStream imageFormStream, PDRectangle formrect, AffineTransform affineTransform, PDJpeg img) throws IOException { /* * if you need text on the visible signature * * PDFont font = PDTrueTypeFont.loadTTF(this.pdfStructure.getTemplate(), * new File("D:\\arial.ttf")); font.setFontEncoding(new * WinAnsiEncoding()); * * Map<String, PDFont> fonts = new HashMap<String, PDFont>(); * fonts.put("arial", font); */ PDXObjectForm imageForm = new PDXObjectForm(imageFormStream); imageForm.setBBox(formrect); imageForm.setMatrix(affineTransform); imageForm.setResources(imageFormResources); imageForm.setFormType(1); /* * imageForm.getResources().addFont(font); * imageForm.getResources().setFonts(fonts); */ imageFormResources.getCOSObject().setDirect(true); String imageFormName = innerFormResource.addXObject(imageForm, "n"); String imageName = imageFormResources.addXObject(img, "img"); this.getStructure().setImageForm(imageForm); this.getStructure().setImageFormName(imageFormName); this.getStructure().setImageName(imageName); logger.debug("Created image form"); } public void appendRawCommands(OutputStream os, String commands) throws IOException { os.write(commands.getBytes("UTF-8")); os.close(); } public void createVisualSignature(PDDocument template) { this.getStructure().setVisualSignature(template.getDocument()); logger.debug("Visible signature has been created"); } public void createWidgetDictionary(PDSignatureField signatureField, PDResources holderFormResources) throws IOException { COSDictionary widgetDict = signatureField.getWidget().getDictionary(); widgetDict.setNeedToBeUpdate(true); widgetDict.setItem(COSName.DR, holderFormResources.getCOSObject()); getStructure().setWidgetDictionary(widgetDict); logger.debug("WidgetDictionary has been created"); } public void closeTemplate(PDDocument template) throws IOException { template.close(); this.getStructure().getTemplate().close(); } }