アダプティブフォームで事前入力サービスを使用する

package com.aem.prefill.core;
import com.adobe.forms.common.service.DataXMLOptions;
import com.adobe.forms.common.service.DataXMLProvider;
import com.adobe.forms.common.service.FormsException;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import javax.jcr.Session;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.jackrabbit.api.JackrabbitSession;
import org.apache.jackrabbit.api.security.user.Authorizable;
import org.apache.jackrabbit.api.security.user.UserManager;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.osgi.service.component.annotations.Component;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

@Component
public class PrefillAdaptiveForm implements DataXMLProvider {
  private static final Logger log = LoggerFactory.getLogger(PrefillAdaptiveForm.class);

  @Override
  public String getServiceDescription() {

    return "Custom AEM Forms PreFill Service";
  }

  @Override
  public String getServiceName() {

    return "CustomAemFormsPrefillService";
  }

  @Override
  public InputStream getDataXMLForDataRef(DataXMLOptions dataXmlOptions) throws FormsException {
    InputStream xmlDataStream = null;
    Resource aemFormContainer = dataXmlOptions.getFormResource();
    ResourceResolver resolver = aemFormContainer.getResourceResolver();
    Session session = (Session) resolver.adaptTo(Session.class);
    try {
      UserManager um = ((JackrabbitSession) session).getUserManager();
      Authorizable loggedinUser = um.getAuthorizable(session.getUserID());
      log.debug("The path of the user is" + loggedinUser.getPath());
      DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
      DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
      Document doc = docBuilder.newDocument();
      Element rootElement = doc.createElement("data");
      doc.appendChild(rootElement);

      if (loggedinUser.hasProperty("profile/givenName")) {
        Element firstNameElement = doc.createElement("fname");
        firstNameElement.setTextContent(loggedinUser.getProperty("profile/givenName")[0].getString());
        rootElement.appendChild(firstNameElement);
        log.debug("Created firstName Element");
      }

      if (loggedinUser.hasProperty("profile/familyName")) {
        Element lastNameElement = doc.createElement("lname");
        lastNameElement.setTextContent(loggedinUser.getProperty("profile/familyName")[0].getString());
        rootElement.appendChild(lastNameElement);
        log.debug("Created lastName Element");

      }
      if (loggedinUser.hasProperty("profile/email")) {
        Element emailElement = doc.createElement("email");
        emailElement.setTextContent(loggedinUser.getProperty("profile/email")[0].getString());
        rootElement.appendChild(emailElement);
        log.debug("Created email Element");

      }

      TransformerFactory transformerFactory = TransformerFactory.newInstance();
      ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
      Transformer transformer = transformerFactory.newTransformer();
      DOMSource source = new DOMSource(doc);
      StreamResult outputTarget = new StreamResult(outputStream);
      TransformerFactory.newInstance().newTransformer().transform(source, outputTarget);
      if (log.isDebugEnabled()) {
        FileOutputStream output = new FileOutputStream("afdata.xml");
        StreamResult result = new StreamResult(output);
        transformer.transform(source, result);
      }

      xmlDataStream = new ByteArrayInputStream(outputStream.toByteArray());
      return xmlDataStream;
    } catch (Exception e) {
      log.error("The error message is " + e.getMessage());
    }
    return null;

  }

}