protected String getBinaryUrl()

in flex-maven-tools/flex-sdk-converter/retrievers/download/src/main/java/org/apache/flex/utilities/converter/retrievers/download/DownloadRetriever.java [339:405]
63 lines of code
15 McCabe index (conditional complexity)

    protected String getBinaryUrl(SdkType sdkType, String version, PlatformType platformType)
            throws RetrieverException {
        try {
            final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            final DocumentBuilder builder = factory.newDocumentBuilder();
            final URL configUrl = new URL(getFlexInstallerConfigUrl());
            URLConnection connection;
            ProxySettings proxySettings = ProxySettings.getProxySettings();
            if(proxySettings != null) {
                SocketAddress socketAddress = new InetSocketAddress(proxySettings.getHost(), proxySettings.getPort());
                Proxy proxy = new Proxy(Proxy.Type.valueOf(proxySettings.getProtocol().toUpperCase()), socketAddress);
                connection = configUrl.openConnection(proxy);
                LOG.info("Using proxy: " + proxySettings.getHost());
            } else {
                connection = configUrl.openConnection();
            }
            final Document doc = builder.parse(connection.getInputStream());

            //Evaluate XPath against Document itself
            final String expression = getUrlXpath(sdkType, version, platformType);
            final XPath xPath = XPathFactory.newInstance().newXPath();
            final Element artifactElement = (Element) xPath.evaluate(
                    expression, doc.getDocumentElement(), XPathConstants.NODE);
            if(artifactElement == null) {
                throw new RetrieverException("Could not find " + sdkType.toString() + " SDK with version " + version);
            }

            final StringBuilder stringBuilder = new StringBuilder();
            if ((sdkType == SdkType.FLEX) || (sdkType == SdkType.SWFOBJECT)) {
                final String path = artifactElement.getAttribute("path");
                final String file = artifactElement.getAttribute("file");
                if (!path.startsWith("http://")) {
                    stringBuilder.append("http://archive.apache.org/dist/");
                }
                stringBuilder.append(path);
                if(!path.endsWith("/")) {
                    stringBuilder.append("/");
                }
                stringBuilder.append(file);
                if(sdkType == SdkType.FLEX) {
                    stringBuilder.append(".zip");
                }
            } else {
                final NodeList pathElements = artifactElement.getElementsByTagName("path");
                final NodeList fileElements = artifactElement.getElementsByTagName("file");
                if ((pathElements.getLength() != 1) && (fileElements.getLength() != 1)) {
                    throw new RetrieverException("Invalid document structure.");
                }
                final String path = pathElements.item(0).getTextContent();
                stringBuilder.append(path);
                if(!path.endsWith("/")) {
                    stringBuilder.append("/");
                }
                stringBuilder.append(fileElements.item(0).getTextContent());
            }

            return stringBuilder.toString();
        } catch (ParserConfigurationException e) {
            throw new RetrieverException("Error parsing 'sdk-installer-config-4.0.xml'", e);
        } catch (SAXException e) {
            throw new RetrieverException("Error parsing 'sdk-installer-config-4.0.xml'", e);
        } catch (XPathExpressionException e) {
            throw new RetrieverException("Error parsing 'sdk-installer-config-4.0.xml'", e);
        } catch (IOException e) {
            throw new RetrieverException("Error parsing 'sdk-installer-config-4.0.xml'", e);
        }
    }