Main.java Source code

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Here is the source code for Main.java

Source

import java.io.ByteArrayInputStream;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

public class Main {
    private static String getXPath(Node root, String elementName) {
        for (int i = 0; i < root.getChildNodes().getLength(); i++) {
            Node node = root.getChildNodes().item(i);
            if (node instanceof Element == false) {
                return null;
            }
            if (node.getNodeName().equals(elementName)) {
                return "/" + node.getNodeName();
            } else if (node.getChildNodes().getLength() > 0) {
                String xpath = getXPath(node, elementName);
                if (xpath != null) {
                    return "/" + node.getNodeName() + xpath;
                }
            }
        }
        return null;
    }

    private static String getXPath(Document document, String elementName) {
        return document.getDocumentElement().getNodeName() + getXPath(document.getDocumentElement(), elementName);
    }

    public static void main(String[] args) throws Exception {
        Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder()
                .parse(new ByteArrayInputStream(
                        ("<foo><foo1>Foo Test 1</foo1><foo2><another1><test1>Foo Test 2</test1></another1></foo2><foo3>Foo Test 3</foo3><foo4>Foo Test 4</foo4></foo>")
                                .getBytes()));
        String xpath = "/" + getXPath(document, "test1");
        Node node1 = (Node) XPathFactory.newInstance().newXPath().compile(xpath).evaluate(document,
                XPathConstants.NODE);
        Node node2 = (Node) XPathFactory.newInstance().newXPath().compile("//test1").evaluate(document,
                XPathConstants.NODE);
        System.out.println(node1.equals(node2));
    }
}