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Remove XMLUtils.java from the SSSD federation provider
Closes #45962 Signed-off-by: rmartinc <rmartinc@redhat.com>
This commit is contained in:
Ricardo Martin
GitHub
parent
c63f54ba3a
commit
047230a052
1 changed files with 0 additions and 226 deletions
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package org.freedesktop.dbus.utils;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.transform.OutputKeys;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerException;
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.dom.DOMSource;
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import javax.xml.transform.stream.StreamResult;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathConstants;
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import javax.xml.xpath.XPathExpression;
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import javax.xml.xpath.XPathExpressionException;
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import javax.xml.xpath.XPathFactory;
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import org.freedesktop.dbus.utils.XmlErrorHandlers.XmlErrorHandlerQuiet;
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import org.w3c.dom.Document;
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import org.w3c.dom.Element;
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import org.w3c.dom.NamedNodeMap;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.xml.sax.ErrorHandler;
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/**
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* Assorted static XML utility methods.
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*
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* @author hypfvieh
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*/
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public final class XmlUtil {
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private XmlUtil() {
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}
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/**
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* Shortcut for checking if given node is of type {@link Element}.
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*
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* @param _node node
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* @return true if {@link Element}, false otherwise
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*/
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public static boolean isElementType(Node _node) {
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return _node instanceof Element;
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}
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/**
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* Checks and converts given {@link Node} to {@link Element} if possible.
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* @param _node node
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* @return {@link Element} or null if given {@link Node} is not {@link Element} subtype
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*/
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public static Element toElement(Node _node) {
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if (isElementType(_node)) {
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return (Element) _node;
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}
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return null;
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}
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/**
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* Applies a xpathExpression to a xml-Document and return a {@link NodeList} with the results.
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*
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* @param _xpathExpression xpath expression
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* @param _xmlDocumentOrNode document or node
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* @return {@link NodeList}
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* @throws IOException on error
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*/
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public static NodeList applyXpathExpressionToDocument(String _xpathExpression, Node _xmlDocumentOrNode)
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throws IOException {
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XPathFactory xfactory = XPathFactory.newInstance();
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XPath xpath = xfactory.newXPath();
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XPathExpression expr = null;
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try {
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expr = xpath.compile(_xpathExpression);
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} catch (XPathExpressionException _ex) {
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throw new IOException(_ex);
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}
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Object result = null;
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try {
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result = expr.evaluate(_xmlDocumentOrNode, XPathConstants.NODESET);
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} catch (Exception _ex) {
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throw new IOException(_ex);
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}
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return (NodeList) result;
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}
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/**
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* Read the given string as XML document.
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*
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* @param _xmlStr xml string
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* @param _validating boolean
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* @param _namespaceAware boolean
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* @return {@link org.w3c.dom.Document}
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* @throws IOException on error
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*/
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public static Document parseXmlString(String _xmlStr, boolean _validating, boolean _namespaceAware) throws IOException {
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DocumentBuilderFactory dbFac = DocumentBuilderFactory.newInstance();
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dbFac.setNamespaceAware(_namespaceAware);
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dbFac.setValidating(_validating);
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try {
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return dbFac.newDocumentBuilder().parse(new ByteArrayInputStream(_xmlStr.getBytes(StandardCharsets.UTF_8)));
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} catch (IOException _ex) {
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throw _ex;
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} catch (Exception _ex) {
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throw new IOException("Failed to parse " + Util.abbreviate(_xmlStr, 500), _ex);
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}
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}
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/**
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* Convert a {@link NodeList} to a Java {@link List} of {@link Element}s.
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* @param _nodeList collection of nodes
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* @return list of elements
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*/
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public static List<Element> convertToElementList(NodeList _nodeList) {
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List<Element> elemList = new ArrayList<>();
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for (int i = 0; i < _nodeList.getLength(); i++) {
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Element elem = (Element) _nodeList.item(i);
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elemList.add(elem);
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}
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return elemList;
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}
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/**
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* Converts {@link NamedNodeMap} to a {@link LinkedHashMap}<String,String>.
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* @param _nodeMap node map
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* @return {@link LinkedHashMap}, maybe empty but never null
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*/
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public static Map<String, String> convertToAttributeMap(NamedNodeMap _nodeMap) {
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Map<String, String> map = new LinkedHashMap<>();
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for (int i = 0; i < _nodeMap.getLength(); i++) {
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Node node = _nodeMap.item(i);
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map.put(node.getNodeName(), node.getNodeValue());
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}
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return map;
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}
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/**
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* Loads XML from string and uses referenced XSD to validate the content.
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*
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*
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* @param _xmlStr string to validate
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* @param _namespaceAware take care of namespace
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* @param _errorHandler e.g. {@link XmlErrorHandlers.XmlErrorHandlerQuiet} or {@link XmlErrorHandlers.XmlErrorHandlerRuntimeException}
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* @return Document
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* @throws IOException on error
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*/
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public static Document parseXmlStringWithXsdValidation(String _xmlStr, boolean _namespaceAware, ErrorHandler _errorHandler) throws IOException {
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ErrorHandler handler = _errorHandler;
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if (_errorHandler == null) {
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handler = new XmlErrorHandlers.XmlErrorHandlerQuiet();
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}
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DocumentBuilderFactory dbFac = DocumentBuilderFactory.newInstance();
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dbFac.setValidating(true);
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dbFac.setNamespaceAware(_namespaceAware);
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dbFac.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaLanguage",
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"http://www.w3.org/2001/XMLSchema");
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try {
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DocumentBuilder builder = dbFac.newDocumentBuilder();
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builder.setErrorHandler(handler);
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return builder.parse(new ByteArrayInputStream(_xmlStr.getBytes(StandardCharsets.UTF_8)));
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} catch (IOException _ex) {
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throw _ex;
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} catch (Exception _ex) {
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throw new IOException("Failed to parse " + Util.abbreviate(_xmlStr, 500), _ex);
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}
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}
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/**
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* Loads XML from string and uses referenced XSD to validate the content.
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* This method will use {@link XmlErrorHandlerQuiet} to suppress all errors/warnings when validating.
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*
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* @param _xmlStr string to validate
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* @param _namespaceAware take care of namespace
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* @return Document
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* @throws IOException on error
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*/
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public static Document parseXmlStringWithXsdValidation(String _xmlStr, boolean _namespaceAware) throws IOException {
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return parseXmlStringWithXsdValidation(_xmlStr, _namespaceAware, null);
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}
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/**
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* Dump a {@link Document} or {@link Node}-compatible object to the given {@link OutputStream} (e.g. System.out).
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*
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* @param _docOrNode {@link Document} or {@link Node} object
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* @param _outStream {@link OutputStream} to print on
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* @throws IOException on error
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*/
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public static void printDocument(Node _docOrNode, OutputStream _outStream) throws IOException {
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if (_docOrNode == null || _outStream == null) {
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throw new IOException("Cannot print (on) 'null' object");
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}
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TransformerFactory tf = TransformerFactory.newInstance();
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Transformer transformer;
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try {
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transformer = tf.newTransformer();
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transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
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transformer.setOutputProperty(OutputKeys.METHOD, "xml");
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transformer.setOutputProperty(OutputKeys.INDENT, "yes");
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transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
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transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
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transformer.transform(new DOMSource(_docOrNode),
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new StreamResult(new OutputStreamWriter(_outStream, StandardCharsets.UTF_8)));
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} catch (TransformerException _ex) {
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throw new IOException("Could not print Document or Node.", _ex);
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}
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}
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}
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