Java Utililty Methods XML Node Parent

NodeList childNodes = element.getChildNodes();
for (int i = 0; i < childNodes.getLength(); i++) {
    Node item = childNodes.item(i);
    if (item instanceof Element) {
        return (Element) item;
return null;
...

NodeList children = node.getChildNodes();
if (children == null)
    return null;
for (int i = 0; i < children.getLength(); i++) {
    try {
        Element child = (Element) children.item(i);
        if (name.equals(getElementLocalName(child)) && namespace.equals(getElementNamespaceURI(child))) {
            return child;
...

if (Node.DOCUMENT_NODE == xml.getNodeType()) {
    xml = xml.getFirstChild();
if (Optional.ofNullable(xml.getNamespaceURI()).orElse("").trim().equals("")) {
    throw new IllegalArgumentException("Namespace URI cannot be null!");
return xml;

ArrayList<Element> elements = getElementsByTagName(node, tagName);
if (!elements.isEmpty())
    return elements.get(0);
return null;

for (int i = 0; i < node.getChildNodes().getLength(); i++) {
    Node n = node.getChildNodes().item(i);
    if (n.getNodeType() == Node.ELEMENT_NODE && n.getNodeName().equals(tagName)) {
        return (Element) n;
return null;

if (node != null && element != null) {
    NodeList nl = node.getChildNodes();
    for (int i = 0; i < nl.getLength(); i++) {
        Node n = nl.item(i);
        if (n.getNodeType() == Node.ELEMENT_NODE && n.getNodeName().equals(element))
            return n;
return null;

if (node.getNodeName().equalsIgnoreCase(name))
    return node;
else {
    NodeList list = node.getChildNodes();
    for (int i = 0, len = list.getLength(); i < len; i++) {
        Node n = getFirstNamedNode(list.item(i), name);
        if (n != null)
            return n;
...

NodeList nodes;
nodes = root.getChildNodes();
for (int i = 0; i < nodes.getLength(); i++) {
    Node n = nodes.item(i);
    if (n.getNodeName().equals(tagName)) {
        return n;
return null;

NodeList children = node.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
    if (isValidNode(children.item(i)))
        return children.item(i);
return null;

Node parent = elem.getParentNode();
if (parent instanceof Element)
    return (Element) parent;
return null;