questions.forms.GetTextFields.java Source code

Introduction

Here is the source code for questions.forms.GetTextFields.java

Source

/*
 * This example was written by Bruno Lowagie, author of the book
 * 'iText in Action' by Manning Publications (ISBN: 1932394796).
 * You can use this example as inspiration for your own applications.
 * The following license applies:
 * http://www.1t3xt.com/about/copyright/index.php?page=MIT
 */

package questions.forms;

import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Map;
import java.util.Set;

import com.lowagie.text.pdf.AcroFields;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfLister;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.AcroFields.Item;

public class GetTextFields {

    public static final String RESOURCE = "resources/questions/forms/textfields.pdf";
    public static final String RESULT = "results/questions/forms/textfieldinfo.txt";

    @SuppressWarnings("unchecked")
    public static void main(String[] args) {
        try {
            PrintStream out = new PrintStream(new File(RESULT));

            PdfLister lister = new PdfLister(out);

            PdfReader reader = new PdfReader(RESOURCE);

            PdfDictionary root = reader.getCatalog();
            PdfDictionary acroform = root.getAsDict(PdfName.ACROFORM);

            out.println("These are the form's font dictionaries:");
            PdfDictionary fonts = acroform.getAsDict(PdfName.DR).getAsDict(PdfName.FONT);
            for (PdfName key : (Set<PdfName>) fonts.getKeys()) {
                lister.listDict((PdfDictionary) PdfReader.getPdfObject(fonts.get(key)));
            }
            out.println("--------------");

            out.println("This is the default appearance for the complete form:");
            lister.listAnyObject(PdfReader.getPdfObject(acroform.get(PdfName.DA)));
            out.println("--------------");

            AcroFields form = reader.getAcroFields();
            Map<String, Item> fields = form.getFields();
            Item item;
            for (String name : fields.keySet()) {
                out.println(name);
                if (form.getFieldType(name) == AcroFields.FIELD_TYPE_TEXT) {
                    item = form.getFieldItem(name);
                    PdfDictionary dict = (PdfDictionary) item.getMerged(0);

                    out.println("This is the field's font dictionary:");
                    fonts = dict.getAsDict(PdfName.DR).getAsDict(PdfName.FONT);
                    for (PdfName key : (Set<PdfName>) fonts.getKeys()) {
                        lister.listDict((PdfDictionary) PdfReader.getPdfObject(fonts.get(key)));
                    }
                    out.println("---");
                    out.println("This is the field's default appearance");
                    lister.listAnyObject(PdfReader.getPdfObject(dict.get(PdfName.DA)));
                } else {
                    out.println("NOT A TEXT FIELD!");
                }
                out.println("--------------");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}