A common use case is to be able to download an interactive DoR with the Adaptive Form data. The downloaded DoR will then be completed using Adobe Acrobat or Adobe Reader.
To accomplish this use case we need to do the following
Generate sample data for the XDP
Open the XDP in AEM Forms designer.
Click File | Form Properties | Preview
Click Generate Preview Data
Click Generate
Provide meaningful file name such as “form-data.xml”
Generate XSD from the xml data
You can use any of the free online tools to generate XSD from the xml data generated in the previous step.
Create Adaptive Form
Create adaptive form based on the XSD from the previous step. Associate the form to use the client lib “irs”. This client library has the code to make a POST call to the servlet which return the PDF to the calling application
The following code gets triggered when the Download PDF is clicked
$(document).ready(function() {
$(".downloadpdf").click(function() {
window.guideBridge.getDataXML({
success: function(guideResultObject) {
var req = new XMLHttpRequest();
req.open("POST", "/bin/generateinteractivedor", true);
req.responseType = "blob";
var formData = new FormData();
formData.append("dataXml", guideResultObject.data);
console.log(guideResultObject.data);
req.send(formData);
req.onreadystatechange = function() {
if (req.readyState == 4 && req.status == 200) {
download(this.response, "report.pdf", "application/pdf");
}
}
}
});
});
});
Create custom servlet
Create a custom servlet that will merge the data with XDP template and return the pdf. The code to accomplish this is listed below. The custom servlet is part of the AEMFormsDocumentServices.core-1.0-SNAPSHOT bundle).
package com.aemformssamples.documentservices.core.servlets;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.StringWriter;
import javax.servlet.Servlet;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Node;
import com.adobe.aemfd.docmanager.Document;
import com.adobe.fd.forms.api.FormsService;
import com.adobe.fd.forms.api.FormsServiceException;
import com.aemformssamples.documentservices.core.DocumentServices;
@Component(service = {
Servlet.class
}, property = {
"sling.servlet.methods=post",
"sling.servlet.paths=/bin/generateinteractivedor"
})
public class GenerateIInteractiveDor extends SlingAllMethodsServlet {
@Reference
DocumentServices documentServices;
@Reference
FormsService formsService;
private static final Logger log = LoggerFactory.getLogger(GenerateIInteractiveDor.class);
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) {
doPost(request, response);
}
protected void doPost(SlingHttpServletRequest request, SlingHttpServletResponse response) {
// The xdp name can be passed to this servlet. For now it have been hardocded.
String xdpName = "f8918-r14e_redo-barcode_3 2.xdp";
XPathFactory xfact = XPathFactory.newInstance();
XPath xpath = xfact.newXPath();
//String dataXml = request.getParameter("formData");
String dataXml = request.getParameter("dataXml");
System.out.println("The data xml is " + dataXml);
org.w3c.dom.Document xmlDataDoc = documentServices.w3cDocumentFromStrng(dataXml);
System.out.println("The af bound data is " + xmlDataDoc.getElementsByTagName("topmostSubform").getLength());
try {
// get the actual xml data that needs to be merged with the template. This can be made more generic
Node res = (Node) xpath.evaluate("afData/afBoundData/topmostSubform", xmlDataDoc, XPathConstants.NODE);
StringWriter writer = new StringWriter();
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(new DOMSource(res), new StreamResult(writer));
String xml = writer.toString();
System.out.println(xml);
xmlDataDoc = documentServices.w3cDocumentFromStrng(xml);
Document xmlDataDocument = documentServices.orgw3cDocumentToAEMFDDocument(xmlDataDoc);
String xdpTemplatePath = "crx:///content/dam/formsanddocuments";
com.adobe.fd.forms.api.PDFFormRenderOptions renderOptions = new com.adobe.fd.forms.api.PDFFormRenderOptions();
renderOptions.setAcrobatVersion(com.adobe.fd.forms.api.AcrobatVersion.Acrobat_11);
renderOptions.setContentRoot(xdpTemplatePath);
renderOptions.setRenderAtClient(com.adobe.fd.forms.api.RenderAtClient.NO);
Document xdpPDF = formsService.renderPDFForm(xdpName, xmlDataDocument, renderOptions);
InputStream fileInputStream = xdpPDF.getInputStream();
System.out.println("Got xdp PDF" + fileInputStream.available());
response.setContentType("application/pdf");
response.addHeader("Content-Disposition", "attachment; filename=" + xdpName.replace("xdp", "pdf"));
response.setContentLength((int) fileInputStream.available());
OutputStream responseOutputStream = response.getOutputStream();
int bytes;
while ((bytes = fileInputStream.read()) != -1) {
responseOutputStream.write(bytes);
}
responseOutputStream.flush();
responseOutputStream.close();
} catch (XPathExpressionException e) {
log.debug(e.getMessage());
} catch (TransformerException e) {
log.debug(e.getMessage());
} catch (FormsServiceException e) {
log.debug(e.getMessage());
} catch (IOException e) {
log.debug(e.getMessage());
}
}
}
In the sample code, the template name(f8918-r14e_redo-barcode_3 2.xdp) is hardcoded. You can easily pass in the template name to the servlet to make this code generic to work against all templates.
Deploy the sample on your server
To test this on your local server, please follow the following steps:
