xmlutils.java

来自「开源的axis2框架的源码。用于开发WEBSERVER」· Java 代码 · 共 586 行 · 第 1/2 页

     */
    public static QName getQNameFromString(String str, Node e) {
        if (str == null || e == null) {
            return null;
        }

        int idx = str.indexOf(':');
        if (idx > -1) {
            String prefix = str.substring(0, idx);
            String ns = getNamespace(prefix, e);
            if (ns == null) {
                return null;
            }
            return new QName(ns, str.substring(idx + 1));
        } else {
            return new QName("", str);
        }
    }

    /**
     * Returns a string for a particular QName, mapping a new prefix
     * if necessary.
     */
    public static String getStringForQName(QName qname, Element e) {
        String uri = qname.getNamespaceURI();
        String prefix = getPrefix(uri, e);
        if (prefix == null) {
            int i = 1;
            prefix = "ns" + i;
            while (getNamespace(prefix, e) != null) {
                i++;
                prefix = "ns" + i;
            }
            e.setAttributeNS(Constants.NS_URI_XMLNS,
                             "xmlns:" + prefix, uri);
        }
        return prefix + ":" + qname.getLocalPart();
    }

    /**
     * Concatinates all the text and cdata node children of this elem and returns
     * the resulting text.
     * (by Matt Duftler)
     *
     * @param parentEl the element whose cdata/text node values are to
     *                 be combined.
     * @return Returns the concatinated string.
     */
    public static String getChildCharacterData(Element parentEl) {
        if (parentEl == null) {
            return null;
        }
        Node tempNode = parentEl.getFirstChild();
        StringBuffer strBuf = new StringBuffer();
        CharacterData charData;

        while (tempNode != null) {
            switch (tempNode.getNodeType()) {
                case Node.TEXT_NODE :
                case Node.CDATA_SECTION_NODE:
                    charData = (CharacterData) tempNode;
                    strBuf.append(charData.getData());
                    break;
            }
            tempNode = tempNode.getNextSibling();
        }
        return strBuf.toString();
    }

    public static class ParserErrorHandler implements ErrorHandler {
        /**
         * Returns a string describing parse exception details
         */
        private String getParseExceptionInfo(SAXParseException spe) {
            String systemId = spe.getSystemId();
            if (systemId == null) {
                systemId = "null";
            }
            return "URI=" + systemId +
                    " Line=" + spe.getLineNumber() +
                    ": " + spe.getMessage();
        }

        // The following methods are standard SAX ErrorHandler methods.
        // See SAX documentation for more info.

        public void warning(SAXParseException spe) throws SAXException {
        }

        public void error(SAXParseException spe) throws SAXException {
            String message = "Error: " + getParseExceptionInfo(spe);
            throw new SAXException(message);
        }

        public void fatalError(SAXParseException spe) throws SAXException {
            String message = "Fatal Error: " + getParseExceptionInfo(spe);
            throw new SAXException(message);
        }
    }


    /**
     * Utility to get the bytes uri.
     * Does NOT handle authenticated URLs,
     * use getInputSourceFromURI(uri, username, password)
     *
     * @param uri the resource to get
     */
    public static InputSource getInputSourceFromURI(String uri) {
        return new InputSource(uri);
    }


    /**
     * Utility to get the bytes at a protected uri
     * <p/>
     * Retrieves the URL if a username and password are provided.
     * The java.net.URL class does not do Basic Authentication, so we have to
     * do it manually in this routine.
     * <p/>
     * If no username is provided, creates an InputSource from the uri
     * and lets the InputSource go fetch the contents.
     *
     * @param uri      the resource to get
     * @param username basic auth username
     * @param password basic auth password
     */
    private static InputSource getInputSourceFromURI(String uri,
                                                     String username,
                                                     String password)
            throws IOException, ProtocolException, UnsupportedEncodingException {
        URL wsdlurl = null;
        try {
            wsdlurl = new URL(uri);
        } catch (MalformedURLException e) {
            // we can't process it, it might be a 'simple' foo.wsdl
            // let InputSource deal with it
            return new InputSource(uri);
        }

        // if no authentication, just let InputSource deal with it
        if (username == null && wsdlurl.getUserInfo() == null) {
            return new InputSource(uri);
        }

        // if this is not an HTTP{S} url, let InputSource deal with it
        if (!wsdlurl.getProtocol().startsWith("http")) {
            return new InputSource(uri);
        }

        URLConnection connection = wsdlurl.openConnection();
        // Does this work for https???
        if (!(connection instanceof HttpURLConnection)) {
            // can't do http with this URL, let InputSource deal with it
            return new InputSource(uri);
        }
        HttpURLConnection uconn = (HttpURLConnection) connection;
        String userinfo = wsdlurl.getUserInfo();
        uconn.setRequestMethod("GET");
        uconn.setAllowUserInteraction(false);
        uconn.setDefaultUseCaches(false);
        uconn.setDoInput(true);
        uconn.setDoOutput(false);
        uconn.setInstanceFollowRedirects(true);
        uconn.setUseCaches(false);

        // username/password info in the URL overrides passed in values 
        String auth = null;
        if (userinfo != null) {
            auth = userinfo;
        } else if (username != null) {
            auth = (password == null) ? username : username + ":" + password;
        }

        if (auth != null) {
            uconn.setRequestProperty("Authorization",
                                     "Basic " +
                                             base64encode(auth.getBytes(charEncoding)));
        }

        uconn.connect();

        return new InputSource(uconn.getInputStream());
    }

    public static String base64encode(byte[] bytes) {
        return Base64.encode(bytes);
    }

    public static InputSource getEmptyInputSource() {
        return new InputSource(bais);
    }

    /**
     * Finds a Node with a given QNameb.
     *
     * @param node parent node
     * @param name QName of the child we need to find
     * @return Returns child node.
     */
    public static Node findNode(Node node, QName name) {
        if (name.getNamespaceURI().equals(node.getNamespaceURI()) &&
                name.getLocalPart().equals(node.getLocalName())) {
            return node;
        }
        NodeList children = node.getChildNodes();
        for (int i = 0; i < children.getLength(); i++) {
            Node ret = findNode(children.item(i), name);
            if (ret != null) {
                return ret;
            }
        }
        return null;
    }

    /**
     * Converts a given DOM Element to an OMElement.
     *
     * @param element
     * @return Returns OMElement.
     * @throws Exception
     */
    public static OMElement toOM(Element element) throws Exception {

        Source source = new DOMSource(element);

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        Result result = new StreamResult(baos);

        Transformer xformer = TransformerFactory.newInstance().newTransformer();
        xformer.transform(source, result);

        ByteArrayInputStream is = new ByteArrayInputStream(baos.toByteArray());
        XMLStreamReader reader = StAXUtils
                .createXMLStreamReader(is);

        StAXOMBuilder builder = new StAXOMBuilder(reader);
        builder.setCache(true);

        return builder.getDocumentElement();
    }


    /**
     * Converts a given OMElement to a DOM Element.
     *
     * @param element
     * @return Returns Element.
     * @throws Exception
     */
    public static Element toDOM(OMElement element) throws Exception {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        element.serialize(baos);
        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(true);
        return factory.newDocumentBuilder().parse(bais).getDocumentElement();
    }


    /**
     * Converts a given inputstream to an OMNode
     *
     * @param inputStream
     * @return
     * @throws javax.xml.stream.XMLStreamException
     *
     */
    public static OMNode toOM(InputStream inputStream) throws XMLStreamException {
        XMLStreamReader xmlReader = StAXUtils
                .createXMLStreamReader(inputStream);
        OMFactory fac = OMAbstractFactory.getOMFactory();
        StAXOMBuilder staxOMBuilder = new StAXOMBuilder(fac, xmlReader);
        return staxOMBuilder.getDocumentElement();
    }

    /**
     * Converts a given Reader to an OMNode
     *
     * @param reader
     * @return
     * @throws XMLStreamException
     */
    public static OMNode toOM(Reader reader) throws XMLStreamException {
        XMLStreamReader xmlReader = StAXUtils
                .createXMLStreamReader(reader);
        OMFactory fac = OMAbstractFactory.getOMFactory();
        StAXOMBuilder staxOMBuilder = new StAXOMBuilder(fac, xmlReader);
        return staxOMBuilder.getDocumentElement();
    }
}