Close PdfAcroForm constructors. Detect pdfA conformance level from reader when creating fields on stamping mode

DEVSIX-575

Author: Snipx

forms/src/main/java/com/itextpdf/forms/PdfAcroForm.java

@@ -136,8 +136,9 @@ public class PdfAcroForm extends PdfObjectWrapper<PdfDictionary> {
      * 
      * @param pdfObject the PdfDictionary to be wrapped
      */
-    protected PdfAcroForm(PdfDictionary pdfObject) {
+    private PdfAcroForm(PdfDictionary pdfObject, PdfDocument pdfDocument) {
         super(pdfObject);
+        document = pdfDocument;
         getFormFields();
         xfaForm = new XfaForm(pdfObject);
     }
@@ -148,8 +149,8 @@ protected PdfAcroForm(PdfDictionary pdfObject) {
      * 
      * @param fields a {@link PdfArray} of {@link PdfDictionary} objects
      */
-    protected PdfAcroForm(PdfArray fields) {
-        this(createAcroFormDictionaryByFields(fields));
+    private PdfAcroForm(PdfArray fields) {
+        this(createAcroFormDictionaryByFields(fields), null);
         setForbidRelease();
     }
 
@@ -174,7 +175,7 @@ public static PdfAcroForm getAcroForm(PdfDocument document, boolean createIfNotE
                 acroForm.setDefaultAppearance("/Helv 0 Tf 0 g ");
             }
         } else {
-            acroForm = new PdfAcroForm(acroFormDictionary);
+            acroForm = new PdfAcroForm(acroFormDictionary, document);
         }
 
         if (acroForm != null) {

forms/src/main/java/com/itextpdf/forms/fields/PdfFormField.java

@@ -854,6 +854,9 @@ public static PdfFormField makeFormField(PdfObject pdfObject, PdfDocument docume
         }
         if (field != null) {
             field.makeIndirect(document);
+            if (document != null && document.getReader() != null && document.getReader().getPdfAConformanceLevel() != null) {
+                field.pdfAConformanceLevel = document.getReader().getPdfAConformanceLevel();
+            }
         }
         return field;
     }
@@ -1755,7 +1758,7 @@ public boolean regenerateField() {
                         break;
                 }
                 PdfWidgetAnnotation widget = getWidgets().get(0);
-                if (widget.getNormalAppearanceObject().containsKey(new PdfName(value))) {
+                if (widget.getNormalAppearanceObject() != null && widget.getNormalAppearanceObject().containsKey(new PdfName(value))) {
                     widget.setAppearanceState(new PdfName(value));
                 } else {
                     widget.setAppearanceState(new PdfName("Off"));