Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * The MIT License
 * 
 * Copyright (c) 2011, Jesse Farinacci
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

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;

public class Main {
    private static final XPathFactory XPATH_FACTORY = XPathFactory.newInstance();

    public static String evaluateStringXPath(final Document document, final String expression)
            throws XPathExpressionException {
        return evaluateStringXPath(document, compile(expression));
    }

    public static String evaluateStringXPath(final Document document, final XPathExpression expression)
            throws XPathExpressionException {
        notNull(document);
        notNull(expression);

        return (String) expression.evaluate(document, XPathConstants.STRING);
    }

    public static XPathExpression compile(final String expression) throws XPathExpressionException {
        notNull(expression);

        return XPATH_FACTORY.newXPath().compile(expression);
    }

    public static void notNull(final Object object) {
        if (object == null) {
            throw new IllegalArgumentException();
        }
    }
}