com.npower.dl.DownloadFactory.java Source code

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Here is the source code for com.npower.dl.DownloadFactory.java

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/**
  * $Header: /home/master/nWave-DM-Common/src/com/npower/dl/DownloadFactory.java,v 1.3 2007/03/12 14:47:47 zhao Exp $
  * $Revision: 1.3 $
  * $Date: 2007/03/12 14:47:47 $
  *
  * ===============================================================================================
  * License, Version 1.1
  *
  * Copyright (c) 1994-2006 NPower Network Software Ltd.  All rights reserved.
  *
  * This SOURCE CODE FILE, which has been provided by NPower as part
  * of a NPower product for use ONLY by licensed users of the product,
  * includes CONFIDENTIAL and PROPRIETARY information of NPower.
  *
  * USE OF THIS SOFTWARE IS GOVERNED BY THE TERMS AND CONDITIONS
  * OF THE LICENSE STATEMENT AND LIMITED WARRANTY FURNISHED WITH
  * THE PRODUCT.
  *
  * IN PARTICULAR, YOU WILL INDEMNIFY AND HOLD NPower, ITS RELATED
  * COMPANIES AND ITS SUPPLIERS, HARMLESS FROM AND AGAINST ANY CLAIMS
  * OR LIABILITIES ARISING OUT OF THE USE, REPRODUCTION, OR DISTRIBUTION
  * OF YOUR PROGRAMS, INCLUDING ANY CLAIMS OR LIABILITIES ARISING OUT OF
  * OR RESULTING FROM THE USE, MODIFICATION, OR DISTRIBUTION OF PROGRAMS
  * OR FILES CREATED FROM, BASED ON, AND/OR DERIVED FROM THIS SOURCE
  * CODE FILE.
  * ===============================================================================================
  */
package com.npower.dl;

import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.lang.StringUtils;

/**
 * @author Zhao DongLu
 * @version $Revision: 1.3 $ $Date: 2007/03/12 14:47:47 $
 */
public class DownloadFactory {

    /**
     * 
     */
    public static final String OPERARION_INSTALL_NOTIFICATION = "InstallNotification";
    /**
     * 
     */
    public static final String OPERATION_DOWNLOAD = "Download";
    /**
     * 
     */
    public static final String OPERATION_DOWNLOAD_DESCRIPTOR = "DownloadDescriptor";

    private DownloadFactory() {
        super();
    }

    public static DownloadFactory newInstance() {
        return new DownloadFactory();
    }

    /**
     * Extract Download ID From URL
     * @param uri
     * @return
     */
    public static String parserDownloadID(String uri) {
        if (StringUtils.isEmpty(uri)) {
            return null;
        }
        String result = uri.trim();
        if (result.lastIndexOf('.') > 0 && result.lastIndexOf('.') > result.lastIndexOf('/')) {
            result = result.substring(0, result.lastIndexOf('.'));
        }
        while (result.endsWith("/")) {
            result = result.substring(0, result.length() - 1);
        }
        result = result.substring(result.lastIndexOf('/') + 1, result.length());
        return result;
    }

    /**
     * Extract Download operation from URL
     * @param uri
     * @return
     */
    public static String parserOperation(String uri) {
        if (StringUtils.isEmpty(uri)) {
            return null;
        }
        String result = uri.trim();
        while (result.endsWith("/")) {
            result = result.substring(0, result.length() - 1);
        }
        result = result.substring(0, result.lastIndexOf('/'));

        result = result.substring(result.lastIndexOf('/') + 1, result.length());
        return result;
    }

    /**
     * Extract Server URL: 
     * http(s)://server:port
     * 
     * @param requestURL
     * @return
     * @throws MalformedURLException
     */
    public static String getServerURL(String requestURL) throws MalformedURLException {
        URL url = new URL(requestURL);
        String protocol = url.getProtocol();
        String server = url.getHost();
        int port = url.getPort();
        if (port <= 0) {
            if (protocol.equalsIgnoreCase("https")) {
                port = 443;
            } else {
                port = 80;
            }
        }
        String serverURL = protocol + "://" + server + ":" + port;
        return serverURL;
    }

    /**
     * Return a instance of Download Descriptior.
     * @param downloadID
     * @return
     */
    public DownloadDescriptor getDownloadDescriptor(String downloadID) {
        DownloadDescriptor dd = new FumoDownloadDescriptor();
        dd.setDownloadID(downloadID);
        return dd;
    }
}