final int[] fontBBox = new int[BoundingBox.BBOX_ENTRIES];
for (int i = 0; i < psarray.size(); i++) {
final Object arrayItem = psarray.get(i);
if (arrayItem instanceof PsInteger) {
final PsInteger psInteger = (PsInteger) arrayItem;
final int itemValue = psInteger.intValue();
fontBBox[i] = itemValue;
} else {
return null;
}
}