Java Utililty Methods XML Parse Stream

StringBuffer result = new StringBuffer();
if (reader != null) {
    try {
        while (reader.hasNext()) {
            switch (reader.getEventType()) {
            case XMLStreamConstants.START_ELEMENT:
                result.append("<");
                printName(reader, result);
...

Set<String> set = new HashSet<>();
for (String name : elementNames) {
    set.add(name);
List<String> stateNames = new ArrayList<String>();
while (true) {
    if (reader.getEventType() == END_DOCUMENT) {
        break;
...

try {
    BufferedInputStream in = new BufferedInputStream(is);
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    InputSource source = new InputSource(in);
    return builder.parse(source);
} finally {
    is.close();
...

DocumentBuilder builder = createDocumentBuilder(namespaces, validating);
return builder.parse(in);

try {
    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setNamespaceAware(false);
    DocumentBuilder builder = domFactory.newDocumentBuilder();
    return builder.parse(is);
} catch (Exception e) {
    throw new IOException("Error parsing XML Stream", e);

ArrayList<HashMap<String, String>> returnValues = new ArrayList<HashMap<String, String>>();
try {
    DocumentBuilder docBuilder = factory.newDocumentBuilder();
    Document doc = docBuilder.parse(is);
    Element rootElement = doc.getDocumentElement();
    for (int i = 0; i < tagNames.length; i++) {
        NodeList targetNodes = rootElement.getElementsByTagName(tagNames[i]);
        if (targetNodes.getLength() <= 0) {
...

if (reader.getNamespaceCount() == 0) {
    return Collections.emptyMap();
Map<String, String> prefixToNamespace = new HashMap<String, String>(reader.getNamespaceCount());
int namespaceCount = reader.getNamespaceCount();
for (int i = 0; i < namespaceCount; i++) {
    String namespacePrefix = reader.getNamespacePrefix(i);
    String namespaceURI = reader.getNamespaceURI(namespacePrefix);
...

while (reader.hasNext()) {
    switch (reader.nextTag()) {
    case XMLStreamConstants.END_ELEMENT: {
        return;
    default: {
        throw unexpectedContent(reader);
throw endOfDocument(reader.getLocation());

StringBuilder sb = new StringBuilder(5);
while (stream.peek().isCharacters()) {
    sb.append(stream.nextEvent().asCharacters().getData());
if (!stream.nextEvent().isEndElement()) {
    throw new RuntimeException("Did not end up with end tag while parsing number.");
return Integer.parseInt(sb.toString());
...

Map<String, String> xmlMap = new HashMap<String, String>();
try {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document document = db.parse(inputStream);
    Element root = document.getDocumentElement();
    NodeList nodes = root.getChildNodes();
    int len = nodes.getLength();
...