import org.w3c.dom.Document;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

public class DOMPrettyPrinter {

public static void prettyPrint(Document doc, int indentLevel) {

try {

prettyPrintHelper(doc, indentLevel);

} catch (Exception e) {

System.err.println("Error during pretty printing: " + e.getMessage());

e.printStackTrace(); // Log the stack trace for debugging

}

}

private static void prettyPrintHelper(Document doc, int indentLevel) throws Exception {

for (int i = 0; i < indentLevel; i++) {

System.out.print(" "); // Indentation

}

if (doc.getDocumentElement() == null) {

System.out.println("(Document with no root element)");

return;

}

Node root = doc.getDocumentElement();

System.out.println(root.getNodeName());

if (root.hasChildNodes()) {

NodeList children = root.childNodes;

for (int i = 0; i < children.length; i++) {

Node child = children.item(i);

prettyPrintHelper(child.asDocument(), indentLevel + 1);

}

}

}

public static void main(String[] args) {

// Example usage (replace with your DOM)

try {

Document doc = createSampleDOM();

prettyPrint(doc, 0);

} catch (Exception e) {

System.err.println("Error creating sample DOM: " + e.getMessage());

e.printStackTrace();

}

}

private static Document createSampleDOM() {

Document doc = Document.createDocument(null, "root", null);

Node node1 = doc.createElement("div");

doc.appendChild(node1);

Node node2 = doc.createElement("p");

node1.appendChild(node2);

node2.appendChild(doc.createTextNode("This is a paragraph."));

Node node3 = doc.createElement("ul");

node1.appendChild(node3);

NodeList listItems = doc.createDocumentFragment().getChildren(node3);

for (int i = 0; i < 3; i++) {

Node listItem = doc.createElement("li");

node3.appendChild(listItem);

listItem.appendChild(doc.createTextNode("Item " + (i + 1)));

}

return doc;

}

}