public static IDWithIssuer valueOf(Attributes attrs, int idTag, int issuerSeqTag) {
String id = attrs.getString(idTag);
if (id == null) return null;
return new IDWithIssuer(id, Issuer.valueOf(attrs.getNestedDataset(issuerSeqTag)));
}
public String selectStringValue(Attributes attrs, String defVal) {
Attributes item = attrs.getNestedDataset(itemPointers);
return item != null ? item.getString(privateCreator, tag, vr, valueIndex, defVal) : defVal;
}
protected Attributes item(Attributes attrs) {
for (int sqtag : itemPath) {
if (sqtag == -1) attrs = (sqtag == -1) ? attrs.getParent() : attrs.getNestedDataset(sqtag);
}
return attrs;
}