in tooling/camel-kafka-connector-generator-maven-plugin/src/main/java/org/apache/camel/kafkaconnector/maven/utils/MavenUtils.java [147:179]
public static void writeXmlFormatted(Document pom, File destination, Log log) throws Exception {
XPathExpression xpath = XPathFactory.newInstance().newXPath().compile("//text()[normalize-space(.) = '']");
NodeList emptyNodes = (NodeList) xpath.evaluate(pom, XPathConstants.NODESET);
// Remove empty text nodes
for (int i = 0; i < emptyNodes.getLength(); i++) {
Node emptyNode = emptyNodes.item(i);
emptyNode.getParentNode().removeChild(emptyNode);
}
pom.setXmlStandalone(true);
TransformerFactory transformerFactory = TransformerFactory.newInstance();
transformerFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
DOMSource source = new DOMSource(pom);
String content;
try (StringWriter out = new StringWriter()) {
StreamResult result = new StreamResult(out);
transformer.transform(source, result);
content = out.toString();
}
// Fix header formatting problem
content = content.replaceFirst("-->", "-->\n").replaceFirst("\\?><!--", "\\?>\n<!--");
writeFileIfChanged(content, destination, log);
}