A null check on two entity fields

Question

I am working on a JAVA EE application. I am creating a form using itext. This would be saved as a pdf file. I have two fields (ID Number and Passport Number). I am currently struggling with performing a null check on them. For instance, if the ID number field is null, then check whether or not the Passport Number field is null. If both are null, then display a text "No ID Numbers detected."

ID Number and passport numbers are of type string.

This is my code presently.

PdfPCell a3 = new PdfPCell();
        a3.setColspan(4);
        a3.addElement(PdfUtil.getSmallParagraph("ID NUMBER: " + (client.getIdNumber() != null ? client.getPassportNo() : "")));
        tbl.addCell(a3);

What have you tried? This is a very simple thing. The community will help only when you have done your bit, please do not expect the community to spoon speed you. — Abhijith Nagarajan, Nov 20 '15 at 12:45
Just do the logical 'if/else' in your getsmallParagraph method. With parameters "IdNumber, PassportNo" — Fundhor, Nov 20 '15 at 12:48

score 1 · Answer 1 · answered Nov 20 '15 at 12:46

1

You can try something like this

if(client.getIdNumber() == null && client.getPassportNumber() == null)
{
 //print No ID Numbers detected
}

if(client.getIdNumber()!= null)
{
  if(client.getPassportNumber()!= null)
  {
  // do something 
  }
}

answered Nov 20 '15 at 12:46

RockAndRoll

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score 1 · Answer 2 · answered Nov 20 '15 at 12:46

In a single line, with a nested, nasty ternary operator :

String text = "ID NUMBER: " + (client.getIdNumber() == null ? (client.getPassportNo() != null ? client.getPassportNo() : "NO ID FOUND") : client.getIdNumber());

Absolutely not the best for code readability ...

A null check on two entity fields

2 Answers2