Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * DSS - Digital Signature Services
 *
 * Copyright (C) 2011 European Commission, Directorate-General Internal Market and Services (DG MARKT), B-1049 Bruxelles/Brussel
 *
 * Developed by: 2011 ARHS Developments S.A. (rue Nicolas Bov 2B, L-1253 Luxembourg) http://www.arhs-developments.com
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * "DSS - Digital Signature Services" is free software: you can redistribute it and/or modify it under the terms of
 * the GNU Lesser General Public License as published by the Free Software Foundation, either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * DSS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * "DSS - Digital Signature Services".  If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.Iterator;
import javax.xml.crypto.dsig.XMLSignature;

import javax.xml.namespace.NamespaceContext;
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.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**
     * Return the Element corresponding the the XPath
     * 
     * @param xmlNode
     * @param xpathString
     * @return
     * @throws XPathExpressionException
     */
    public static Element getElement(Node xmlNode, String xpathString) throws XPathExpressionException {
        XPathExpression expr = createXPathExpression(xpathString);
        NodeList list;
        list = (NodeList) expr.evaluate(xmlNode, XPathConstants.NODESET);
        if (list.getLength() > 1) {
            throw new RuntimeException("More than one result for XPath: " + xpathString);
        }
        return (Element) list.item(0);
    }

    private static XPathExpression createXPathExpression(String xpathString) {
        /* XPath */
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        xpath.setNamespaceContext(new NamespaceContext() {

            @Override
            public Iterator<?> getPrefixes(String namespaceURI) {
                throw new RuntimeException();
            }

            @Override
            public String getPrefix(String namespaceURI) {
                throw new RuntimeException();
            }

            @Override
            public String getNamespaceURI(String prefix) {
                if ("ds".equals(prefix)) {
                    return XMLSignature.XMLNS;
                } else if ("xades".equals(prefix)) {
                    return "http://uri.etsi.org/01903/v1.3.2#";
                } else if ("xades141".equals(prefix)) {
                    return "http://uri.etsi.org/01903/v1.4.1#";
                } else if ("xades111".equals(prefix)) {
                    return "http://uri.etsi.org/01903/v1.1.1#";
                }
                throw new RuntimeException("Prefix not recognized : " + prefix);
            }
        });
        try {
            XPathExpression expr = xpath.compile(xpathString);
            return expr;
        } catch (XPathExpressionException ex) {
            throw new RuntimeException(ex);
        }

    }
}