List of usage examples for com.itextpdf.text.pdf PdfStamper addSignature
public PdfFormField addSignature(final String name, final int page, final float llx, final float lly, final float urx, final float ury)
From source file:org.alfresco.extension.countersign.action.executer.PDFAddSignatureFieldActionExecuter.java
License:Open Source License
/** * @see org.alfresco.repo.action.executer.ActionExecuterAbstractBase#executeImpl(org.alfresco.service.cmr.repository.NodeRef, * org.alfresco.service.cmr.repository.NodeRef) *///w w w . j a v a 2s . com protected void executeImpl(Action ruleAction, NodeRef actionedUponNodeRef) { NodeService ns = serviceRegistry.getNodeService(); if (ns.exists(actionedUponNodeRef) == false) { // node doesn't exist - can't do anything return; } String fieldName = (String) ruleAction.getParameterValue(PARAM_FIELDNAME); String position = (String) ruleAction.getParameterValue(PARAM_POSITION); JSONObject box; int page = -1; // parse out the position JSON JSONObject positionObj = null; try { positionObj = (JSONObject) parser.parse(position); } catch (ParseException e) { logger.error("Could not parse position JSON from Share"); throw new AlfrescoRuntimeException("Could not parse position JSON from Share"); } // get the page page = Integer.parseInt(String.valueOf(positionObj.get("page"))); // get the box box = (JSONObject) positionObj.get("box"); try { // open original pdf ContentReader pdfReader = getReader(actionedUponNodeRef); PdfReader reader = new PdfReader(pdfReader.getContentInputStream()); OutputStream cos = serviceRegistry.getContentService() .getWriter(actionedUponNodeRef, ContentModel.PROP_CONTENT, true).getContentOutputStream(); PdfStamper stamp = new PdfStamper(reader, cos); // does a field with this name already exist? AcroFields allFields = stamp.getAcroFields(); // if this doc is already signed, cannot add a new sig field without if (allFields.getSignatureNames() != null && allFields.getSignatureNames().size() > 0) { throw new AlfrescoRuntimeException("This document has signatures applied, " + "adding a new signature field would invalidate existing signatures"); } // cant create duplicate field names if (allFields.getFieldType(fieldName) == AcroFields.FIELD_TYPE_SIGNATURE) { throw new AlfrescoRuntimeException( "A signature field named " + fieldName + " already exists in this document"); } // create the signature field Rectangle pageRect = reader.getPageSizeWithRotation(page); Rectangle sigRect = positionBlock(pageRect, box); PdfFormField sigField = stamp.addSignature(fieldName, page, sigRect.getLeft(), sigRect.getBottom(), sigRect.getRight(), sigRect.getTop()); // style the field (no borders) sigField.setBorder(new PdfBorderArray(0, 0, 0)); sigField.setBorderStyle(new PdfBorderDictionary(0, PdfBorderDictionary.STYLE_SOLID)); allFields.regenerateField(fieldName); // apply the change and close streams stamp.close(); reader.close(); cos.close(); // once the signature field has been added, apply the sig field aspect if (!ns.hasAspect(actionedUponNodeRef, CounterSignSignatureModel.ASPECT_SIGNABLE)) { ns.addAspect(actionedUponNodeRef, CounterSignSignatureModel.ASPECT_SIGNABLE, null); } // now update the signature fields metadata Serializable currentFields = ns.getProperty(actionedUponNodeRef, CounterSignSignatureModel.PROP_SIGNATUREFIELDS); ArrayList<String> fields = new ArrayList<String>(); if (currentFields != null) { fields.addAll((List<String>) currentFields); } fields.add(fieldName); ns.setProperty(actionedUponNodeRef, CounterSignSignatureModel.PROP_SIGNATUREFIELDS, fields); } catch (IOException ioex) { throw new AlfrescoRuntimeException(ioex.getMessage()); } catch (DocumentException dex) { throw new AlfrescoRuntimeException(dex.getMessage()); } }