Get custom metadata for itext 7 pdf document - pdf

Question

I used the link given below for getting metadata in itext 5 using: Get and set metadata for itext pdf document
Currently, i can get metadata in itext7 too using the snippet:
PdfDocument pdfDoc = new PdfDocument(new PdfReader(src));
PdfDocumentInfo info = pdfDoc.getDocumentInfo();
info.getAuthor();
info.getCreator();
info.getProducer();
I don't know how to get custom properties using the same.
I can set custom metadata using:
pdfDoc.getDocumentInfo().setMoreInfo("Test", "test");
How to get this value programatically without hard coding the key name?
Also, is there a way to get these metadata values (including custom metadata) without actually writing:
getAuthor, getCreator, etc?

Answer 1

No worries, got the answer.
Didn't realize earlier that:
PdfDictionary map = info.getPdfObject();
returns map type object. Parsed the map to get all the key-value pairs including the custom properties.
Below is the full code snippet:
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfDocumentInfo;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfObject;
import com.itextpdf.kernel.pdf.PdfReader;
import java.io.File;
import java.io.IOException;
import java.util.Map.Entry;
public class GetInfo {
public static final String SRC = "hello.pdf";
public static void main(String[] args) throws IOException {
File file = new File(SRC);
file.getParentFile().mkdirs();
new GetInfo().manipulatePdf(SRC);
}
public void manipulatePdf(String src) throws IOException {
PdfDocument pdfDoc = new PdfDocument(new PdfReader(src));
PdfDocumentInfo info = pdfDoc.getDocumentInfo();
PdfDictionary map = info.getPdfObject();
for(Entry<PdfName, PdfObject> entry : map.entrySet()){
System.out.println(entry.getKey().getValue() + " - " + entry.getValue() );
}
pdfDoc.close();
}
}

Answer 2

In iText 7.0.8+ you can get a pdf metadata map this way.
PdfDocument pdfDoc = new PdfDocument(new PdfReader(src));
//get metadata map
PdfDictionary catalog = pdfDoc.getTrailer();
PdfDictionary map = catalog.getAsDictionary(PdfName.Info);
for (Map.Entry<PdfName, PdfObject> entry : map.entrySet()) {
System.out.println(entry.getKey().getValue() + " - " + entry.getValue());
}
pdfDoc.close();
You can set custom metadata using:
map.put(new PdfName("test"), new PdfString("test"));