示例#1
0
  /**
   * Performs an XPATH lookup in an xml document whose filename is specified by the first parameter
   * (assumed to be in the auxiliary subdirectory) The XPATH expression is supplied as the second
   * string parameter The return value is of type string e.g. this is currently used primarily for
   * looking up the Company Prefix Index for encoding a GS1 Company Prefix into a 64-bit EPC tag
   */
  private String xpathlookup(String xml, String expression) {

    try {

      // Parse the XML as a W3C document.
      DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
      Document document =
          builder.parse(new File(xmldir + File.separator + "auxiliary" + File.separator + xml));

      XPath xpath = XPathFactory.newInstance().newXPath();

      String rv = (String) xpath.evaluate(expression, document, XPathConstants.STRING);

      return rv;

    } catch (ParserConfigurationException e) {
      System.err.println("ParserConfigurationException caught...");
      e.printStackTrace();
      return null;
    } catch (XPathExpressionException e) {
      System.err.println("XPathExpressionException caught...");
      e.printStackTrace();
      return null;
    } catch (SAXException e) {
      System.err.println("SAXException caught...");
      e.printStackTrace();
      return null;
    } catch (IOException e) {
      System.err.println("IOException caught...");
      e.printStackTrace();
      return null;
    }
  }
示例#2
0
  static {
    try {
      dbf.setNamespaceAware(true);
      db = dbf.newDocumentBuilder();
      xpath.setNamespaceContext(
          new NamespaceContext() {

            @Override
            public Iterator<String> getPrefixes(String namespaceURI) {
              return Arrays.asList("md").iterator();
            }

            @Override
            public String getPrefix(String namespaceURI) {
              return "md";
            }

            @Override
            public String getNamespaceURI(String prefix) {
              return "http://www.osgi.org/xmlns/metatype/v1.1.0";
            }
          });
    } catch (ParserConfigurationException e) {
      e.printStackTrace();
      throw new ExceptionInInitializerError(e);
    }
  }