Second list of changes from the code review

Author: vstange

src/main/java/com/formulasearchengine/mathmlquerygenerator/BasicXQueryGenerator.java

@@ -74,14 +74,16 @@ private String generateSimpleConstraints(Node node, boolean isRoot) {
                 //If an element node and not an attribute or text node, add to xquery and increment index
                 childElementIndex++;
 
-                // We only want to consider elements below the content mathml semantics, a deeper annotation-node will be ignored
-                boolean notAnnotationNode = child.getLocalName() == null || !XMLHelper.ANNOTATION_XML_PATTERN.matcher(child.getLocalName()).matches();
-                if (notAnnotationNode) {
-                    if (handleSpecialElements(child, childElementIndex)) {
-                        // this was a special element and was handled otherwise (e.g. qvar)
-                        continue;
-                    }
+                boolean wasSpecialElement = handleSpecialElements(child, childElementIndex);
+                if (wasSpecialElement) {
+                    continue; // this was a special element and was handled otherwise (e.g. qvar)
+                }
 
+                // We only want to consider elements below the content mathml semantics,
+                // a deeper lying annotation-node should be ignored
+                boolean annotationNode = child.getLocalName() != null
+                        && XMLHelper.ANNOTATION_XML_PATTERN.matcher(child.getLocalName()).matches();
+                if (!annotationNode) {
                     if (queryHasText) {
                         //Add another condition on top of existing condition in query
                         out.append(" and ");

src/main/java/com/formulasearchengine/mathmltools/mml/CMMLInfo.java

@@ -101,10 +101,12 @@ private void abstractNodeCD(Node node) {
         String cd;
         try {
             cd = node.getAttributes().getNamedItem("cd").getNodeValue();
-        } catch (final DOMException | NullPointerException e) {
-            LOG.error("attribute not accessible or not found", e);
+        } catch (final DOMException e) {
+            LOG.warn("attribute not accessible or not found", e);
             //TODO: Implement CD fallback
             cd = "";
+        } catch (final NullPointerException e) {
+            cd = "";
         }
         if (cd != null && cd.isEmpty()) {
             return;