protected void performFastDownload()

in flex-maven-tools/flex-sdk-converter/retrievers/download/src/main/java/org/apache/flex/utilities/converter/retrievers/download/DownloadRetriever.java [188:242]
47 lines of code
8 McCabe index (conditional complexity)

    protected void performFastDownload(URL sourceUrl, File targetFile) throws IOException {
        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 = sourceUrl.openConnection(proxy);
        } else {
            connection = sourceUrl.openConnection();
        }
        ReadableByteChannel rbc = null;
        FileOutputStream fos = null;
        try {
            rbc = Channels.newChannel(connection.getInputStream());
            fos = new FileOutputStream(targetFile);

                ////////////////////////////////////////////////////////////////////////////////
                // Do the downloading.
                ////////////////////////////////////////////////////////////////////////////////

            final long expectedSize = connection.getContentLength();
            long transferedSize = 0L;

            LOG.info("===========================================================");
            LOG.info("Downloading " + sourceUrl.toString());
            if (expectedSize > 1014 * 1024) {
                LOG.info("Expected size: " + (expectedSize / 1024 / 1024) + "MB");
            } else {
                LOG.info("Expected size: " + (expectedSize / 1024) + "KB");
            }
            final ProgressBar progressBar = new ProgressBar(expectedSize);
            while (transferedSize < expectedSize) {
                transferedSize += fos.getChannel().transferFrom(rbc, transferedSize, 1 << 20);
                progressBar.updateProgress(transferedSize);
            }
        } finally {
            if(rbc != null) {
                try {
                    rbc.close();
                } catch (IOException e) {
                    // Ignore ...
                }
            }
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    // Ignore ...
                }
            }
        }
        LOG.info("");
        LOG.info("Finished downloading.");
        LOG.info("===========================================================");
    }