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From: Kevin Ternes <KTernes@thegeneral.com>
To: "users@pdfbox.apache.org" <users@pdfbox.apache.org>
Date: Tue, 8 Sep 2015 09:45:11 -0500
Subject: Best way to deal with NULL PDAcroForm fields
Thread-Topic: Best way to deal with NULL PDAcroForm fields
Thread-Index: AdDqRPOlKjFxtrDtQ0i25L/IUxOvEQ==
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I get a lot of weird documents.  When I try to set a particular field value=
, some of them throw NullPointerExceptions from line PDAcroForm.getField(),=
 line 291:

287: COSArray fields =3D
288:    (COSArray) acroForm.getDictionaryObject(
289:        COSName.getPDFName("Fields"));
290:
291: for (int i =3D 0; i < fields.size() && retval =3D=3D null; i++)
292:{

To avoid this, at first I was calling PDAcroForm.getFields() and checking t=
hat to see if that was NULL but I realized that it would usually create a n=
ew fields array to return which seemed wasteful.

Is the most efficient way to avoid this to first call:
    COSArray fields =3D  (COSArray) acroForm.getDictionaryObject( COSName.g=
etPDFName("Fields"));
myself and check if that is NULL?=20


Secondary Question:
The method PDAcroForm.getFields() does a not-NULL check of fields before ca=
lling fields.size().
Is there a reason that this check is not performed in getField()?


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