Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (C) 2007 Asterios Raptis
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class Main {
    /**
     * Gets the node list from the given xml file and the given xpath expression.
     * 
     * @param xml
     *            the xml
     * @param xpathExpression
     *            the xpath expression
     * @return the node list
     * @throws XPathExpressionException
     *             the x path expression exception
     * @throws ParserConfigurationException
     *             the parser configuration exception
     * @throws SAXException
     *             the sAX exception
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public static NodeList getNodeList(File xml, String xpathExpression)
            throws XPathExpressionException, ParserConfigurationException, SAXException, IOException {
        DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        domFactory.setNamespaceAware(true);
        DocumentBuilder builder = domFactory.newDocumentBuilder();
        Document doc = builder.parse(xml);
        XPath xpath = XPathFactory.newInstance().newXPath();
        XPathExpression expr = xpath.compile(xpathExpression);

        Object result = expr.evaluate(doc, XPathConstants.NODESET);
        NodeList nodes = (NodeList) result;
        return nodes;
    }

    /**
     * Gets the node list from the given xml file and the given xpath expression.
     * 
     * @param xml
     *            the xml file as string.
     * @param xpathExpression
     *            the xpath expression as string.
     * @return the node list
     * @throws XPathExpressionException
     *             the x path expression exception
     * @throws ParserConfigurationException
     *             the parser configuration exception
     * @throws SAXException
     *             the sAX exception
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public static NodeList getNodeList(String xml, String xpathExpression)
            throws XPathExpressionException, ParserConfigurationException, SAXException, IOException {
        DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        domFactory.setNamespaceAware(true);
        DocumentBuilder builder = domFactory.newDocumentBuilder();
        Document doc = builder.parse(xml);
        XPath xpath = XPathFactory.newInstance().newXPath();
        XPathExpression expr = xpath.compile(xpathExpression);

        Object result = expr.evaluate(doc, XPathConstants.NODESET);
        NodeList nodes = (NodeList) result;
        return nodes;
    }
}