I'm looking for assistance in reading field names in an Adobe Dynamic XML
Form (.pdf) with iText-5.0.4.

The PDF was created using Adobe LiveCycle Designer (version
8.2.1.4029.1.523496).
http://itext-general.2136553.n4.nabble.com/file/n2547969/frmTestLetter.pdf
frmTestLetter.pdf 

Using the method readFieldNames from part2.chapter08.XfaMovie at
http://www.itextpdf.com/examples/iia.php?id=164 , looping through the fields
to display the names produces nothing. I'm not sure if the problem is with
my iText Java code, or with the original PDF (if so obviously a different
forum).

If I save the PDF as an Adobe Static PDF Form yes I can display the field
names and populate the fields. The functionality I require eventually is for
fields with a large amount of text to extend to a new page if necessary,
requiring a dynamic form rather than a static one.

package prjCreate_PDF_Templates;
/*
 * This class is part of the book "iText in Action - 2nd Edition"
 * written by Bruno Lowagie (ISBN: 9781935182610)
 * For more info, go to: http://itextpdf.com/examples/
 * This example only works with the AGPL version of iText.
 */
 
//package part2.chapter08;
 
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Set;
 
import org.xml.sax.SAXException;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactoryConfigurationError;
 
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.AcroFields;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.pdf.XfaForm;
 
public class frmTestLetter {
 
        public static final String PATH = "C:/Users/dwyly/Documents/Code
Library/aaJunk/Adobe play/";
    /** The original PDF. */
    public static final String RESOURCE = PATH + "frmTestLetter.pdf";
    /** Shows information about a form that has an AcroForm and an XFA
stream. */
    public static final String RESULTTXT1 = PATH +
"iTextTutorial/movie_xfa.txt";
   
    
    /**
     * Main method
     * @param args no arguments needed
     * @throws IOException
     * @throws DocumentException
     */
    public static void main(String[] args) throws IOException,
DocumentException,
        ParserConfigurationException, SAXException,
        TransformerFactoryConfigurationError, TransformerException {
        frmTestLetter xfa = new frmTestLetter();
        xfa.readFieldnames(RESOURCE, RESULTTXT1);
    } 
    
    
    /**
     * Checks if a PDF containing an interactive form uses
     * AcroForm technology, XFA technology, or both.
     * Also lists the field names.
     * @param src the original PDF
     * @param dest a text file containing form info.
     * @throws IOException
     */
    public void readFieldnames(String src, String dest) throws IOException {
        PrintStream out = new PrintStream(new FileOutputStream(dest));
        PdfReader reader = new PdfReader(src);
        AcroFields form = reader.getAcroFields();
        XfaForm xfa = form.getXfa();
        out.println(xfa.isXfaPresent() ? "XFA form" : "AcroForm");
        Set<String> fields = form.getFields().keySet();
        for (String key : fields) {
            out.println(key);
        }
        out.flush();
        out.close();
        System.out.println("End of readFieldName method");
    }       
 

}

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