diff options
Diffstat (limited to 'pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignaturePlaceholderExtractor.java')
| -rw-r--r-- | pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignaturePlaceholderExtractor.java | 818 |
1 files changed, 392 insertions, 426 deletions
diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignaturePlaceholderExtractor.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignaturePlaceholderExtractor.java index b62b660a..99027be0 100644 --- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignaturePlaceholderExtractor.java +++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignaturePlaceholderExtractor.java @@ -3,19 +3,19 @@ * 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 @@ -51,30 +51,26 @@ import java.awt.geom.NoninvertibleTransformException; import java.awt.image.BufferedImage; import java.io.IOException; import java.util.ArrayList; -import java.util.HashMap; +import java.util.Collections; import java.util.Hashtable; import java.util.List; -import java.util.Map; import java.util.Map.Entry; import java.util.Properties; import java.util.Set; import java.util.Vector; +import java.util.stream.Collectors; import org.apache.pdfbox.contentstream.PDFStreamEngine; import org.apache.pdfbox.contentstream.operator.Operator; import org.apache.pdfbox.contentstream.operator.OperatorProcessor; import org.apache.pdfbox.cos.COSBase; -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.font.PDFont; -import org.apache.pdfbox.pdmodel.font.PDFontFactory; import org.apache.pdfbox.pdmodel.graphics.PDXObject; import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject; +import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature; import org.apache.pdfbox.util.Matrix; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; import com.google.zxing.BarcodeFormat; import com.google.zxing.BinaryBitmap; @@ -91,10 +87,10 @@ import at.gv.egiz.pdfas.common.exceptions.PDFIOException; import at.gv.egiz.pdfas.common.exceptions.PdfAsException; import at.gv.egiz.pdfas.common.exceptions.PlaceholderExtractionException; import at.gv.egiz.pdfas.lib.impl.placeholder.PlaceholderExtractorConstants; -import at.gv.egiz.pdfas.lib.impl.placeholder.SignaturePlaceholderContext; import at.gv.egiz.pdfas.lib.impl.placeholder.SignaturePlaceholderData; import at.knowcenter.wag.egov.egiz.pdf.TablePos; import javassist.bytecode.stackmap.TypeData.ClassName; +import lombok.extern.slf4j.Slf4j; /** * Extract all relevant information from a placeholder image. @@ -102,423 +98,393 @@ import javassist.bytecode.stackmap.TypeData.ClassName; * @author exthex * */ -public class SignaturePlaceholderExtractor extends PDFStreamEngine implements PlaceholderExtractorConstants{ - /** - * The log. - */ - private static Logger logger = LoggerFactory - .getLogger(SignaturePlaceholderExtractor.class); - - private List<SignaturePlaceholderData> placeholders = new ArrayList<>(); - private int currentPage = 0; - private PDDocument doc; - - protected SignaturePlaceholderExtractor(String placeholderId, - int placeholderMatchMode, PDDocument doc) throws IOException, ClassNotFoundException, InstantiationException, IllegalAccessException { - super(); - - final Properties properties = new Properties(); - properties.load(ClassName.class.getClassLoader().getResourceAsStream("placeholder/pdfbox-reader-2.properties")); - - Set<Entry<Object, Object>> entries = properties.entrySet(); - for(Entry<Object, Object> entry:entries){ - String processorClassName = (String)entry.getValue(); - Class<?> klass = Class.forName( processorClassName ); - org.apache.pdfbox.contentstream.operator.OperatorProcessor processor = - (OperatorProcessor) klass.newInstance(); - - addOperator( processor ); - } - this.doc = doc; - } - - /** - * Search the document for placeholder images and possibly included - * additional info.<br/> - * Searches only for the first placeholder page after page from top. - * - * @return all available info from the first found placeholder. - * @throws PdfAsException - * if the document could not be read. - * @throws PlaceholderExtractionException - * if STRICT matching mode was requested and no suitable - * placeholder could be found. - */ - public SignaturePlaceholderData extract(PDDocument doc, - String placeholderId, int matchMode) throws PdfAsException { - SignaturePlaceholderContext.setSignaturePlaceholderData(null); -// SignaturePlaceholderExtractor extractor; -// try { -// extractor = new SignaturePlaceholderExtractor(placeholderId, -// matchMode, doc); -// } catch (IOException | ClassNotFoundException | InstantiationException | IllegalAccessException e2) { -// throw new PDFIOException("error.pdf.io.04", e2); -// } - - int pageNr = 0; - for(PDPage page : doc.getPages()){ - pageNr++; - - try { - setCurrentPage(pageNr); - if(page.getContents() != null && page.getResources() != null && page.getContentStreams() != null) { - processPage(page); //TODO: pdfbox2 - right? - - } - SignaturePlaceholderData ret = matchPlaceholderPage( - placeholders, placeholderId, matchMode); - if (ret != null) { - SignaturePlaceholderContext - .setSignaturePlaceholderData(ret); - return ret; - } - } catch (IOException e1) { - throw new PDFIOException("error.pdf.io.04", e1); - } catch(Throwable e) { - throw new PDFIOException("error.pdf.io.04", e); - } - } - if (placeholders.size() > 0) { - SignaturePlaceholderData ret = matchPlaceholderDocument( - placeholders, placeholderId, matchMode); - SignaturePlaceholderContext.setSignaturePlaceholderData(ret); - return ret; - } - // no placeholders found, apply strict mode if set - if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT) { - throw new PlaceholderExtractionException("error.pdf.stamp.09"); - } - - return null; - } - - public List<SignaturePlaceholderData> extractList(PDDocument doc, - String placeholderId, int matchMode) throws PdfAsException { - SignaturePlaceholderContext.setSignaturePlaceholderData(null); - - int pageNr = 0; - for(PDPage page : doc.getPages()){ - pageNr++; - - try { - setCurrentPage(pageNr); - if(page.getContents() != null && page.getResources() != null && page.getContentStreams() != null) { - processPage(page); //TODO: pdfbox2 - right? - - } - SignaturePlaceholderData ret = matchPlaceholderPage( - placeholders, placeholderId, matchMode); - if (ret != null) { - SignaturePlaceholderContext - .setSignaturePlaceholderData(ret); - return placeholders; - } - } catch (IOException e1) { - throw new PDFIOException("error.pdf.io.04", e1); - } catch(Throwable e) { - throw new PDFIOException("error.pdf.io.04", e); - } - } - if (placeholders.size() > 0) { - SignaturePlaceholderData ret = matchPlaceholderDocument( - placeholders, placeholderId, matchMode); - SignaturePlaceholderContext.setSignaturePlaceholderData(ret); - return placeholders; - } - // no placeholders found, apply strict mode if set - if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT) { - throw new PlaceholderExtractionException("error.pdf.stamp.09"); - } - return null; - } - - private SignaturePlaceholderData matchPlaceholderDocument( - List<SignaturePlaceholderData> placeholders, String placeholderId, - int matchMode) throws PlaceholderExtractionException { - - if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT) - throw new PlaceholderExtractionException("error.pdf.stamp.09"); - - if (placeholders.size() == 0) - return null; - - if (matchMode == PLACEHOLDER_MATCH_MODE_SORTED) { - // sort all placeholders by the id string if all ids are null do nothing - SignaturePlaceholderData currentFirstSpd = null; - for (int i = 0; i < placeholders.size(); i++) { - SignaturePlaceholderData spd = placeholders.get(i); - if (spd.getId() != null) { - if(currentFirstSpd == null) { - currentFirstSpd = spd; - logger.debug("Setting new current ID: {}", - currentFirstSpd.getId()); - } else { - String currentID = currentFirstSpd.getId(); - String testID = spd.getId(); - logger.debug("Testing placeholder current: {} compare to {}", - currentID, testID); - if(testID.compareToIgnoreCase(currentID) < 0) { - currentFirstSpd = spd; - logger.debug("Setting new current ID: {}", - testID); - } - } - } - } - - if(currentFirstSpd != null) { - logger.info("Running Placeholder sorted mode: using id: {}", currentFirstSpd.getId()); - return currentFirstSpd; - } else { - logger.info("Running Placeholder sorted mode: no placeholder with id found, fallback to first placeholder"); - } - } - - for (int i = 0; i < placeholders.size(); i++) { - SignaturePlaceholderData spd = placeholders.get(i); - if (spd.getId() == null) - return spd; - } - - if (matchMode == PLACEHOLDER_MATCH_MODE_LENIENT) - return placeholders.get(0); - - return null; - } - - private SignaturePlaceholderData matchPlaceholderPage( - List<SignaturePlaceholderData> placeholders, String placeholderId, - int matchMode) { - - if(matchMode == PLACEHOLDER_MATCH_MODE_SORTED) - return null; - - if (placeholders.size() == 0) - return null; - for (int i = 0; i < placeholders.size(); i++) { - SignaturePlaceholderData data = placeholders.get(i); - if (placeholderId != null && placeholderId.equals(data.getId())) - return data; - if (placeholderId == null && data.getId() == null) - return data; - } - return null; - } - - - - private void setCurrentPage(int pageNr) { - this.currentPage = pageNr; - } - - @Override - protected void processOperator(Operator operator, List<COSBase> arguments) - throws IOException { - String operation = operator.getName(); - if (operation.equals("Do")) { - COSName objectName = (COSName) arguments.get(0); - PDXObject xobject = (PDXObject) getResources().getXObject(objectName); - if (xobject instanceof PDImageXObject) { - try { - PDImageXObject image = (PDImageXObject) xobject; - SignaturePlaceholderData data = checkImage(image); - if (data != null) { - PDPage page = getCurrentPage(); - Matrix ctm = getGraphicsState() - .getCurrentTransformationMatrix(); - int pageRotation = page.getRotation(); - pageRotation = pageRotation % 360; - double rotationInRadians = Math.toRadians(pageRotation);//(page.findRotation() * Math.PI) / 180; - - AffineTransform rotation = new AffineTransform(); - rotation.setToRotation(rotationInRadians); - AffineTransform rotationInverse = rotation - .createInverse(); - Matrix rotationInverseMatrix = new Matrix(); - rotationInverseMatrix - .setFromAffineTransform(rotationInverse); - Matrix rotationMatrix = new Matrix(); - rotationMatrix.setFromAffineTransform(rotation); - - Matrix unrotatedCTM = ctm - .multiply(rotationInverseMatrix); - - float x = unrotatedCTM.getXPosition(); - float yPos = unrotatedCTM.getYPosition(); - float yScale = unrotatedCTM.getScaleY(); - float y = yPos + yScale; - float w = unrotatedCTM.getScaleX(); - - logger.debug("Page height: {}", page.getCropBox().getHeight()); - logger.debug("Page width: {}", page.getCropBox().getWidth()); - - if(pageRotation == 90) { - y = page.getCropBox().getWidth() - (y * (-1)); - } else if(pageRotation == 180) { - x = page.getCropBox().getWidth() + x; - y = page.getCropBox().getHeight() - (y * (-1)); - } else if(pageRotation == 270) { - x = page.getCropBox().getHeight() + x; - } - - - - - - String posString = "p:" + currentPage + ";x:" + Math.floor(x) - + ";y:" + Math.ceil(y) + ";w:" + Math.ceil(w); - - logger.debug("Found Placeholder at: {}", posString); - try { - data.setTablePos(new TablePos(posString)); - data.setPlaceholderName(objectName.getName()); - placeholders.add(data); - } catch (PdfAsException e) { - throw new IOException(); - } - } - } catch (NoninvertibleTransformException e) { - throw new IOException(e); - } - } - } else { - super.processOperator(operator, arguments); - } - } - - private Map<String, PDFont> fonts; - - //TODO: pdfbox2 - was override - public Map<String, PDFont> getFonts() { - if (fonts == null) { - // at least an empty map will be returned - // TODO we should return null instead of an empty map - fonts = new HashMap<String, PDFont>(); - if(this.getResources() != null && this.getResources().getCOSObject() != null) { - COSDictionary fontsDictionary = (COSDictionary) this.getResources().getCOSObject().getDictionaryObject(COSName.FONT); - if (fontsDictionary == null) { - // ignore we do not want to set anything, never when creating a signature!!!!! - //fontsDictionary = new COSDictionary(); - //this.getResources().getCOSDictionary().setItem(COSName.FONT, fontsDictionary); +@Slf4j +public class SignaturePlaceholderExtractor extends PDFStreamEngine implements PlaceholderExtractorConstants { + + private final List<SignaturePlaceholderData> placeholders = new ArrayList<>(); + private int currentPage = 0; + + protected SignaturePlaceholderExtractor() throws IOException, ClassNotFoundException, + InstantiationException, IllegalAccessException { + super(); + + final Properties properties = new Properties(); + properties.load(ClassName.class.getClassLoader().getResourceAsStream( + "placeholder/pdfbox-reader-2.properties")); + + final Set<Entry<Object, Object>> entries = properties.entrySet(); + for (final Entry<Object, Object> entry : entries) { + final String processorClassName = (String) entry.getValue(); + final Class<?> klass = Class.forName(processorClassName); + final org.apache.pdfbox.contentstream.operator.OperatorProcessor processor = + (OperatorProcessor) klass.newInstance(); + + addOperator(processor); + + } + } + + /** + * Search the document for placeholder images and possibly included additional + * info.<br/> + * Searches only for the first placeholder page after page from top. + * + * @return available info from the first found placeholder. + * @throws PdfAsException if the document could not be read. + * @throws PlaceholderExtractionException if STRICT matching mode was requested + * and no suitable placeholder could be + * found. + */ + public SignaturePlaceholderData extract(PDDocument doc, + String placeholderId, int matchMode) throws PdfAsException { + + List<String> extistingSignatureNames = existingExistingSignatureNames(doc); + + + int pageNr = 0; + for (final PDPage page : doc.getPages()) { + pageNr++; + + try { + this.currentPage = pageNr; + if (page.getContents() != null && page.getResources() != null && page.getContentStreams() != null) { + processPage(page); // TODO: pdfbox2 - right? + + } + + final SignaturePlaceholderData ret = matchPlaceholderPage( + removeAlreadyUsePlaceholders(placeholders, extistingSignatureNames), placeholderId, matchMode); + if (ret != null) { + return ret; + + } + + } catch (final IOException e1) { + throw new PDFIOException("error.pdf.io.04", e1); + + } catch (final Throwable e) { + throw new PDFIOException("error.pdf.io.04", e); + + } + } + + if (placeholders.size() > 0) { + final SignaturePlaceholderData ret = matchPlaceholderDocument( + removeAlreadyUsePlaceholders(placeholders, extistingSignatureNames), placeholderId, matchMode); + return ret; + + } + // no placeholders found, apply strict mode if set + if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT) { + throw new PlaceholderExtractionException("error.pdf.stamp.09"); + + } + return null; + } + + @Override + protected void processOperator(Operator operator, List<COSBase> arguments) + throws IOException { + final String operation = operator.getName(); + if (operation.equals("Do")) { + final COSName objectName = (COSName) arguments.get(0); + final PDXObject xobject = getResources().getXObject(objectName); + if (xobject instanceof PDImageXObject) { + try { + final PDImageXObject image = (PDImageXObject) xobject; + final SignaturePlaceholderData data = checkImage(image); + if (data != null) { + final PDPage page = getCurrentPage(); + final Matrix ctm = getGraphicsState() + .getCurrentTransformationMatrix(); + int pageRotation = page.getRotation(); + pageRotation = pageRotation % 360; + final double rotationInRadians = Math.toRadians(pageRotation);// (page.findRotation() * Math.PI) / + // 180; + + final AffineTransform rotation = new AffineTransform(); + rotation.setToRotation(rotationInRadians); + final AffineTransform rotationInverse = rotation + .createInverse(); + final Matrix rotationInverseMatrix = new Matrix(); + rotationInverseMatrix + .setFromAffineTransform(rotationInverse); + final Matrix rotationMatrix = new Matrix(); + rotationMatrix.setFromAffineTransform(rotation); + + final Matrix unrotatedCTM = ctm + .multiply(rotationInverseMatrix); + + float x = unrotatedCTM.getXPosition(); + final float yPos = unrotatedCTM.getYPosition(); + final float yScale = unrotatedCTM.getScaleY(); + float y = yPos + yScale; + final float w = unrotatedCTM.getScaleX(); + + log.debug("Page height: {}", page.getCropBox().getHeight()); + log.debug("Page width: {}", page.getCropBox().getWidth()); + + if (pageRotation == 90) { + y = page.getCropBox().getWidth() - y * -1; + } else if (pageRotation == 180) { + x = page.getCropBox().getWidth() + x; + y = page.getCropBox().getHeight() - y * -1; + } else if (pageRotation == 270) { + x = page.getCropBox().getHeight() + x; } - else { - for (COSName fontName : fontsDictionary.keySet()) { - COSBase font = fontsDictionary.getDictionaryObject(fontName); - // data-000174.pdf contains a font that is a COSArray, looks to be an error in the - // PDF, we will just ignore entries that are not dictionaries. - if (font instanceof COSDictionary) { - PDFont newFont = null; - try { - newFont = PDFontFactory.createFont((COSDictionary) font); - } - catch (IOException exception) { - logger.error("error while creating a font", exception); - } - if (newFont != null) { - fonts.put(fontName.getName(), newFont); - } - } - } + + final String posString = "p:" + currentPage + ";x:" + Math.floor(x) + + ";y:" + Math.ceil(y) + ";w:" + Math.ceil(w); + + log.debug("Found Placeholder at: {}", posString); + try { + data.setTablePos(new TablePos(posString)); + data.setPlaceholderName(objectName.getName()); + placeholders.add(data); + + } catch (final PdfAsException e) { + throw new IOException(); + } + } + } catch (final NoninvertibleTransformException e) { + throw new IOException(e); + } + } + } else { + super.processOperator(operator, arguments); + } + } + + private SignaturePlaceholderData matchPlaceholderDocument( + List<SignaturePlaceholderData> placeholders, String placeholderId, + int matchMode) throws PlaceholderExtractionException { + + if (matchMode == PLACEHOLDER_MATCH_MODE_STRICT) { + throw new PlaceholderExtractionException("error.pdf.stamp.09"); + } + + if (placeholders.size() == 0) { + return null; + } + + if (matchMode == PLACEHOLDER_MATCH_MODE_SORTED) { + // sort all placeholders by the id string if all ids are null do nothing + SignaturePlaceholderData currentFirstSpd = null; + for (final SignaturePlaceholderData spd : placeholders) { + if (spd.getId() != null) { + if (currentFirstSpd == null) { + currentFirstSpd = spd; + log.debug("Setting new current ID: {}", + currentFirstSpd.getId()); + } else { + currentFirstSpd = placeHolderIdMatcher(currentFirstSpd, spd); + + } + } + } + + if (currentFirstSpd != null) { + log.info("Running Placeholder sorted mode: using id: {}", currentFirstSpd.getId()); + return currentFirstSpd; + + } else { + log.info( + "Running Placeholder sorted mode: no placeholder with id found, fallback to first placeholder"); + } + } + + for (final SignaturePlaceholderData spd : placeholders) { + if (spd.getId() == null) { + return spd; + } + } + + if (matchMode == PLACEHOLDER_MATCH_MODE_LENIENT) { + return placeholders.get(0); + } + + return null; + } + + private SignaturePlaceholderData placeHolderIdMatcher(SignaturePlaceholderData currentFirstSpd, + SignaturePlaceholderData spd) { + try { + Integer currentIDInt = Integer.valueOf(currentFirstSpd.getId()); + Integer testIDInt = Integer.valueOf(spd.getId()); + + if (testIDInt < currentIDInt) { + log.debug("Setting new current ID: {}", testIDInt); + return spd; + + } else { + return currentFirstSpd; + + } + } catch (NumberFormatException e) { + log.trace("Can not compare placeholderId's on integer level. Using String compare ... "); + final String currentID = currentFirstSpd.getId(); + final String testID = spd.getId(); + log.debug("Testing placeholder current: {} compare to {}", + currentID, testID); + if (testID.compareToIgnoreCase(currentID) < 0) { + log.debug("Setting new current ID: {}", + testID); + return spd; + + } else { + return currentFirstSpd; + + } + } + } + + private SignaturePlaceholderData matchPlaceholderPage( + List<SignaturePlaceholderData> placeholders, String placeholderId, + int matchMode) { + + if ((matchMode == PLACEHOLDER_MATCH_MODE_SORTED) || (placeholders.size() == 0)) { + return null; + } + + for (final SignaturePlaceholderData data : placeholders) { + if (placeholderId != null && placeholderId.equals(data.getId())) { + return data; + + } + if (placeholderId == null && data.getId() == null) { + return data; + + } + } + + return null; + } + + private List<String> existingExistingSignatureNames(PDDocument doc) { + final List<String> existingLocations = new ArrayList<>(); + try { + final List<PDSignature> pdSignatureList = doc.getSignatureDictionaries(); + if (pdSignatureList.size() != 0) { + for (final PDSignature sig : pdSignatureList) { + existingLocations.add(sig.getLocation()); + } + } + } catch (final IOException e) { + e.printStackTrace(); + } + return existingLocations; + } + + private List<SignaturePlaceholderData> removeAlreadyUsePlaceholders( + List<SignaturePlaceholderData> placeholders, List<String> existingPlaceholders) { + if (placeholders != null) { + return placeholders.stream() + .filter(el -> !existingPlaceholders.contains(el.getPlaceholderName())) + .collect(Collectors.toList()); + + } else { + return Collections.emptyList(); + + } + } + + /** + * Checks an image if it is a placeholder for a signature. + * + * @param image + * @return + * @throws IOException + */ + private SignaturePlaceholderData checkImage(PDImageXObject image) + throws IOException { + final BufferedImage bimg = image.getImage(); + if (bimg == null) { + String type = image.getSuffix(); + if (type != null) { + type = type.toUpperCase() + " images"; + } else { + type = "Image type"; + } + log.info("Unable to extract image for QRCode analysis. " + + type + + " not supported. Add additional JAI Image filters to your classpath. Refer to https://jai.dev.java.net. Skipping image."); + return null; + + } + + if (bimg.getHeight() < 10 || bimg.getWidth() < 10) { + log.debug("Image too small for QRCode. Skipping image."); + return null; + } + + final LuminanceSource source = new BufferedImageLuminanceSource(bimg); + final BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); + Result result; + final long before = System.currentTimeMillis(); + try { + final Hashtable<DecodeHintType, Object> hints = new Hashtable<>(); + final Vector<BarcodeFormat> formats = new Vector<>(); + formats.add(BarcodeFormat.QR_CODE); + hints.put(DecodeHintType.POSSIBLE_FORMATS, formats); + result = new MultiFormatReader().decode(bitmap, hints); + + final String text = result.getText(); + String profile = null; + String type = null; + String sigKey = null; + String id = null; + if (text != null) { + if (text.startsWith(QR_PLACEHOLDER_IDENTIFIER)) { + + final String[] data = text.split(";"); + if (data.length > 1) { + for (int i = 1; i < data.length; i++) { + final String kvPair = data[i]; + final String[] kv = kvPair.split("="); + if (kv.length != 2) { + log.debug("Invalid parameter in placeholder data: " + + kvPair); + } else { + if (kv[0] + .equalsIgnoreCase(SignaturePlaceholderData.ID_KEY)) { + id = kv[1]; + } else if (kv[0] + .equalsIgnoreCase(SignaturePlaceholderData.PROFILE_KEY)) { + profile = kv[1]; + } else if (kv[0] + .equalsIgnoreCase(SignaturePlaceholderData.SIG_KEY_KEY)) { + sigKey = kv[1]; + } else if (kv[0] + .equalsIgnoreCase(SignaturePlaceholderData.TYPE_KEY)) { + type = kv[1]; + } + } } + } + return new SignaturePlaceholderData(profile, type, sigKey, + id); + } else { + log.warn("QR-Code found but does not start with \"" + + QR_PLACEHOLDER_IDENTIFIER + + "\". Ignoring QR placeholder."); + } + } + } catch (final ReaderException re) { + if (log.isDebugEnabled()) { + log.debug("Could not decode - not a placeholder. needed: " + + (System.currentTimeMillis() - before)); + } + if (!(re instanceof NotFoundException)) { + if (log.isInfoEnabled()) { + log.info("Failed to decode image", re); } - return fonts; - } - - /** - * Checks an image if it is a placeholder for a signature. - * - * @param image - * @return - * @throws IOException - */ - private SignaturePlaceholderData checkImage(PDImageXObject image) - throws IOException { - BufferedImage bimg = image.getImage(); - if (bimg == null) { - String type = image.getSuffix(); - if (type != null) { - type = type.toUpperCase() + " images"; - } else { - type = "Image type"; - } - logger.info("Unable to extract image for QRCode analysis. " - + type - + " not supported. Add additional JAI Image filters to your classpath. Refer to https://jai.dev.java.net. Skipping image."); - return null; - } - if (bimg.getHeight() < 10 || bimg.getWidth() < 10) { - logger.debug("Image too small for QRCode. Skipping image."); - return null; - } - - LuminanceSource source = new BufferedImageLuminanceSource(bimg); - BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); - Result result; - long before = System.currentTimeMillis(); - try { - Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(); - Vector<BarcodeFormat> formats = new Vector<BarcodeFormat>(); - formats.add(BarcodeFormat.QR_CODE); - hints.put(DecodeHintType.POSSIBLE_FORMATS, formats); - result = new MultiFormatReader().decode(bitmap, hints); - - String text = result.getText(); - String profile = null; - String type = null; - String sigKey = null; - String id = null; - if (text != null) { - if (text.startsWith(QR_PLACEHOLDER_IDENTIFIER)) { - - String[] data = text.split(";"); - if (data.length > 1) { - for (int i = 1; i < data.length; i++) { - String kvPair = data[i]; - String[] kv = kvPair.split("="); - if (kv.length != 2) { - logger.debug("Invalid parameter in placeholder data: " - + kvPair); - } else { - if (kv[0] - .equalsIgnoreCase(SignaturePlaceholderData.ID_KEY)) { - id = kv[1]; - } else if (kv[0] - .equalsIgnoreCase(SignaturePlaceholderData.PROFILE_KEY)) { - profile = kv[1]; - } else if (kv[0] - .equalsIgnoreCase(SignaturePlaceholderData.SIG_KEY_KEY)) { - sigKey = kv[1]; - } else if (kv[0] - .equalsIgnoreCase(SignaturePlaceholderData.TYPE_KEY)) { - type = kv[1]; - } - } - } - } - return new SignaturePlaceholderData(profile, type, sigKey, - id); - } else { - logger.warn("QR-Code found but does not start with \"" - + QR_PLACEHOLDER_IDENTIFIER - + "\". Ignoring QR placeholder."); - } - } - } catch (ReaderException re) { - if (logger.isDebugEnabled()) { - logger.debug("Could not decode - not a placeholder. needed: " - + (System.currentTimeMillis() - before)); - } - if (!(re instanceof NotFoundException)) { - if (logger.isInfoEnabled()) { - logger.info("Failed to decode image", re); - } - } - } catch (ArrayIndexOutOfBoundsException e) { - if (logger.isInfoEnabled()) { - logger.info("Failed to decode image. Probably a zxing bug", e); - } - } - return null; - } + } + } catch (final ArrayIndexOutOfBoundsException e) { + if (log.isInfoEnabled()) { + log.info("Failed to decode image. Probably a zxing bug", e); + } + } + return null; + } } |