Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.*;
import java.io.File;
import java.io.IOException;

public class Main {
    public static NodeList getNodesByXPath(File file, String xpath) {
        if (!file.isFile() || !file.canRead())
            return null;

        Document document;
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();

        try {
            DocumentBuilder documentBuilder = dbFactory.newDocumentBuilder();
            document = documentBuilder.parse(file);
        } catch (ParserConfigurationException e) {
            return null;
        } catch (SAXException e) {
            return null;
        } catch (IOException e) {
            return null;
        }

        if (document == null) {
            return null;
        }

        Object result;
        try {
            XPath xpathCompiler = XPathFactory.newInstance().newXPath();
            XPathExpression xPathExpr = xpathCompiler.compile(xpath);
            result = xPathExpr.evaluate(document, XPathConstants.NODESET);
        } catch (XPathExpressionException e) {
            return null;
        }

        return (NodeList) result;
    }
}